# Mountain Warfare Operations

U.S. Marine Corps DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Headquarters United States Marine Corps Washington, D.C. 20350-3000

# Change 1 To Mctp 12-10A Mountain Warfare Operations

1. This publication has been edited to ensure gender neutrality of all applicable and appropriate terms, except those terms governed by higher authority. No other content has been affected. 2. File this transmittal sheet in the front of this publication. Reviewed and approved this date. BY DIRECTION OF THE COMMANDANT OF THE MARINE CORPS
Lieutenant General, U.S. Marine Corps Deputy Commandant for Combat Development and Integration Publication Control Numbers: Publication: 147 000003 00 Change: 147 000003 01


                                                                                                                        2 May 2016



## Erratum

# To

## Mcwp 3-35.1 Mountain Warfare Operations

1. Change all instances of MCWP 3-35.1, *Mountain Warfare Operations*, to MCTP 12-10A, Mountain Warfare Operations. 2. Change PCN 143 000174 00 to PCN 147 000003 00 3. File this transmittal sheet in the front of this publication.

PCN 147 000003 80
DEPARTMENT OF THE NAVY
Headquarters United States Marine Corps Washington, D.C. 20380-1775
28 February 2014

## Foreword

Marine Corps Warfighting Publication (MCWP) 3-35.1 *Mountain Warfare Operations*, is a reference for all unit commanders and their staffs (trained or untrained in mountain warfare) and all leaders from the company level through regiment or brigade for use in operations that occur in mountainous terrain, snow, or cold weather. This publication is designed to be used with Marine Corps Reference Publication (MCRP) 3-35.1A, Small Unit Leader's Guide to Mountain Warfare Operations; MCRP 3-35.1B, Mountain Leader's Guide to Winter Operations; MCRP 3-35.1C, Mountain Leader's Guide to Mountain Warfare Operations; and MCRP 3-35.1D, *Cold Region Operations*. These publications cover a broad range of unit planning considerations that can be used across a range of military operations. This publication references formal individual and collective mountain warfare training programs available within the Department of Defense. Because of the rapid turnover in personnel, operating tempo, multitude of training commitments, and constraint of training resources for these environments, the Marine Corps Mountain Warfare Training Center cannot train all Marines. Therefore, this publicationused in conjunction with MCRP 3-35.1A, MCRP 3-35.1B, MCRP 3-35.1C, and MCRP 3-35.1Didentifies the skills that Marines need to be successful in mountainous, snow, or cold weather environments. During combat, these publications provide Marines with the doctrinal references they need to augment the instruction they receive from their unit's qualified mountain leaders. The Marine Corps doctrinal proponent for mountain and cold regions operations is the Marine Corps Mountain Warfare Training Center (MCMWTC), Bridgeport, California. Contact MCMWTC, Operations and Training for further information.

This publication supersedes Fleet Marine Force Manual (FMFM) 7-29, Mountain Operations, dated January 1980; FMFM 7-21, Tactical Fundamentals for Cold Weather Operations, dated September 1992; and FMFM 7-22, Tactical Fundamentals for Aviation in Cold Weather Operations, dated May 1991.

Reviewed and approved this date. BY DIRECTION OF THE COMMANDANT OF THE MARINE CORPS
K. J. GLUECK, JR.

Deputy Commandant for Combat Development and Integration Publication Control Number: 143 000174 00 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Heavy Equipment . . . . . . . . 5-10 Underground Construction and Confined Spaces  . . . . . . . . 5-11

## Chapter 6. Logistics And Sustainment

General Planning Considerations . . . . . . . . 6-1
Logistic Support Concept . . . . . . . . 6-1 Logistic Cross-Training . . . . . . . . 6-2 Interoperability . . . . . . . . 6-2 Sustainment Challenges . . . . . . . . 6-2 Waste Management  . . . . . . . . 6-3 Supplies and Equipment Accountability  . . . . . . . . 6-3 Route Security  . . . . . . . . 6-3 Aviation Support. . . . . . . . . 6-4 Winterization  . . . . . . . . 6-4
Supply. . . . . . . . . 6-4
Food and Water (Class I) . . . . . . . . 6-4 Clothing, Individual Equipment, and Tents (Class II) . . . . . . . . 6-6 Petroleum, Oils, and Lubricants (Class III) . . . . . . . . 6-7 Other Supplies  . . . . . . . . 6-7
Vehicle and Equipment Operator Considerations  . . . . . . . . 6-9
Vehicle Loading . . . . . . . . 6-9 Vehicle Operation. . . . . . . . . 6-9 Vehicle Rollover. . . . . . . . . 6-10 Vehicle Recovery . . . . . . . . 6-10
Vehicle Maintenance  . . . . . . . . 6-10
Maintenance Personnel. . . . . . . . . 6-10 Preventive Maintenance and Repair. . . . . . . . . 6-11 Field Maintenance  . . . . . . . . 6-11
Distribution and Transportation . . . . . . . . 6-11
Ground Distribution . . . . . . . . 6-12
River Distribution. . . . . . . . . 6-14
Air Distribution. . . . . . . . . 6-14
Medical Support Considerations  . . . . . . . . 6-16
Casualty Collection and Evacuation. . . . . . . . . 6-16 Medical Evacuation  . . . . . . . . 6-17
Acclimatization. . . . . . . . . 6-17

## Chapter 7. Aviation

Antiair Warfare. . . . . . . . . 7-1
Planning Considerations. . . . . . . . . 7-1 Unique Capabilities and Limitations of Marine Corps Low
Altitude Air Defense. . . . . . . . . 7-2
Suppression of Enemy Air Defenses and Air-to-Air
Planning Considerations. . . . . . . . . 7-3
Training Considerations . . . . . . . . 7-3
Air Reconnaissance. . . . . . . . . 7-3
Attack Reconnaissance Helicopter Operations. . . . . . . . . 7-3
Unmanned Aircraft Systems . . . . . . . . 7-4
Assault Support. . . . . . . . . 7-6
Air Delivery  . . . . . . . . 7-6 Combat Search and Rescue and Tactical Recovery of Aircraft
and Personnel  . . . . . . . . 7-7
Medical, Casualty, and Air Evacuations. . . . . . . . . 7-7
Combat Assault Transport  . . . . . . . . 7-8 Airborne Command and Control. . . . . . . . . 7-8 Battlefield Illumination. . . . . . . . . 7-8 Landing Zone Considerations . . . . . . . . 7-9 Snow-Covered Terrain . . . . . . . . 7-9 Air-Ground Integration and Training Considerations. . . . . . . . . 7-10
Marine Corps-Specific Control of Aircraft and Missiles . . . . . . . . 7-10
Marine Air Command and Control System Considerations . . . . . . . . 7-10 Tactical Air Operations Center Considerations  . . . . . . . . 7-12 Joint/Coalition Theater Command and Control Architecture. . . . . . . 7-13
Electronic Warfare  . . . . . . . . 7-13
Weather and Terrain . . . . . . . . 7-13 Time On Station . . . . . . . . 7-13 Electronic Attack. . . . . . . . . 7-13 Electronic Warfare Support  . . . . . . . . 7-14 Electronic Protect . . . . . . . . 7-14 Training Considerations . . . . . . . . 7-14
Offensive Air Support. . . . . . . . . 7-15
Planning Considerations . . . . . . . . 7-15 Ordnance Versus Fuel. . . . . . . . . 7-15 Forward Operating Base and Forward Arming and Refueling
Point Locations . . . . . . . . 7-15
Ordnance Selection . . . . . . . . 7-15 Reduced Power Available. . . . . . . . . 7-16 Geometry of Fires . . . . . . . . 7-16 Weather . . . . . . . . 7-16 Deep Air Support  . . . . . . . . 7-16 Training Considerations . . . . . . . . 7-16
Aviation Ground Support . . . . . . . . 7-17
Planning Considerations . . . . . . . . 7-17 Forward Arming and Refueling Points . . . . . . . . 7-17 Forward Operating Base Locations. . . . . . . . . 7-17
Aviation Logistic Support in a Mountainous Environment . . . . . . . . 7-17
Planning Considerations . . . . . . . . 7-17 Material Storage and Handling Considerations  . . . . . . . . 7-18
Training Considerations . . . . . . . . 7-19

## Chapter 8. Fires

Organization for Artillery. . . . . . . . . 8-1
Movement and Positioning. . . . . . . . . 8-2
Reconnaissance, Selection, and Occupation of a Position . . . . . . . . 8-2
Movement. . . . . . . . . 8-2 Air Movement. . . . . . . . . 8-2 Position Selection . . . . . . . . 8-2 Multiple Launch Rocket System M270A1 and High Mobility
Artillery Rocket System M142 Position Considerations . . . . . . . 8-3
Acquisition and Observation  . . . . . . . . 8-3
Radar Considerations . . . . . . . . 8-3 Observer Considerations. . . . . . . . . 8-4 Use of Laser Range Finders and Laser Designators for
Laser-Guided Munitions. . . . . . . . . 8-5
Survey and Meteorology  . . . . . . . . 8-6
Survey in Mountains. . . . . . . . . 8-6 Global Positioning System Limitations and Considerations  . . . . . . . . 8-6
Meteorological Message Space and Time Validity . . . . . . . . 8-6
Targeting. . . . . . . . . 8-6 Munitions . . . . . . . . 8-7
High Explosive Munitions . . . . . . . . 8-7 Smoke and Obscurants . . . . . . . . 8-7 High-Angle Fire . . . . . . . . 8-8 Thermobaric Weapons . . . . . . . . 8-8
Mortars . . . . . . . . 8-8 Air Support . . . . . . . . 8-9 Naval Surface Fires. . . . . . . . . 8-10 Nonlethal Fires . . . . . . . . 8-10
Information Operations. . . . . . . . . 8-10 Deception . . . . . . . . 8-11
Fire Support Coordination Measures . . . . . . . . 8-11
Artillery Logistics. . . . . . . . . 8-11

## Chapter 9. Communications

Planning Considerations. . . . . . . . . 9-1 Requirements Identification . . . . . . . . 9-1 Communications Systems Comparison . . . . . . . . 9-1
Single-Channel Radio. . . . . . . . . 9-1 High Frequency  . . . . . . . . 9-2 Very High Frequency . . . . . . . . 9-2 Ultra High Frequency . . . . . . . . 9-2 Tactical Satellite Radio. . . . . . . . . 9-4 Commercial Satellite Terminals . . . . . . . . 9-4
Special Purpose Systems. . . . . . . . . 9-4 Multichannel Radios . . . . . . . . 9-4 Enhanced Position Location Reporting System . . . . . . . . 9-5 Blue Force Tracking . . . . . . . . 9-5 Cell Phones . . . . . . . . 9-5

## Chapter 10. Training Considerations

Military Mountaineering Skill Sets. . . . . . . . . 10-1
Level I: Tactical Rope Suspension Technician (Marine Corps)/
Basic Mountaineer (Army) . . . . . . . . 10-2
Level II: Assault Climber (Marine Corps)/Advanced
Mountaineer (Army) . . . . . . . . 10-3
Level III: Mountain Leader. . . . . . . . . 10-3 Additional Knowledge and Skills . . . . . . . . 10-3
Marine Corps Mountain Warfare Training Center . . . . . . . . 10-4
Collective Training . . . . . . . . 10-4 Individual Training . . . . . . . . 10-5
Army Training. . . . . . . . . 10-6
Northern Warfare Training Center . . . . . . . . 10-6 Mountain Warfare School. . . . . . . . . 10-6 Special Forces Command Mountaineering Warfare
Training Detachment. . . . . . . . . 10-7
Navy Sea-Air-Land Team Cold Weather Maritime Course . . . . . . . . 10-7 Army National Guard High Altitude Aviation Training Site . . . . . . . . 10-7 Interagency Training. . . . . . . . . 10-7 Coalition Training in Mountain Warfare  . . . . . . . . 10-7
Training Charts . . . . . . . . 10-7

## Appendices

| A   | Altitude and Environmental Hazards A-1   |
|-----|------------------------------------------|
| B   | Mountain Weather Data B-1                |
| C   | Unmanned Aircraft System Information C-1 |

## Glossary References And Related Publications Chapter 1 Overview

the environment, accompanied by realistic training under similar environmental conditions, is a prerequisite to success.

Mountains establish both formal and informal
boundaries and form barriers. When conflicts
erupt in these rugged areas, commanders are pre-
sented with unique operational challenges: moun-
tainous terrain, snow, and cold weather. Since the
Marine Corps is an expeditionary force designed
to fight anywhere in the world, it must project
force rapidly, sustain itself, and accomplish mis-
sions in such conditions as well as across the
range of military operations and in every clime
and place.

The Marine air-ground task force (MAGTF) sat-
isfies these rapid deployment requirements. As
these units train, they must prepare themselves
for most contingencies and the unique challenges
that each contingency may bring. In order for the
unit to succeed, commanders and leaders must
address environmental challenges and obtain the
requisite skill, special equipment, and training
required for the success of their units.

World War II provided powerful examples that
reinforce the need to properly prepare units for
mountain operations. For example, the 19391940
Winter War in Finland illustrates how a well-pre-
pared, small, elite force could dominate a much
larger, general-purpose force. Although the Soviets
enjoyed a 40 to 1 superiority in personnel, 20 to 1
superiority in aircraft, and a 100 to 1 superiority in
tanks and artillery, the Finns were better prepared
to operate in snow-covered terrain. The Finns'
ability to adapt to the environment allowed them to
use the mobility offered by skis and the cover and
concealment of mountain forests to decimate the
road-bound, Soviet logistic infrastructure. As a
result, the Soviet's supply system completely
broke down and they were unable to maintain
operational-level mobility. Lacking food, winter
clothing, and shelter, the harsh winter environ-
ment ultimately took its toll on the Russian sol-
diers and they simply froze to death.

## Historical Perspective

History is replete with examples of competent mil-
itary forces becoming exhausted, defeated, and
sometimes destroyed by a much smaller adversary
because that adversary proved more skillful in
mountainous terrain and the harsh weather that
often accompanies it. The historical lessons
learned and the development of functional princi-
ples based on these lessons should guide future
preparation and training. A historical study of
mountain operations shows that the key to success
is maintaining contact with the enemy while pre-
serving one's own combat effectiveness. Such suc-
cess requires good command, control, and
communications as well as mobility and logistics
in an environment, which, by its nature, inhibits all
these; therefore, an understanding and respect for

After attempts to capture Bologna failed during
the winter of 194445, allied commanders
focused on the possibility of wide sweeping
movements aimed at encircling Bologna and all
German forces in the region. The plan used the
Army's 10th Mountain Division to capture a
series of mountain peaks and ridges that domi-
nated a 10-mile section of main routes leading
from Pistoia through the northern Apennines. In
order to surprise the Germans, the 10th Mountain
Division's assault teams climbed the 1,500-foot
cliff in the dead of nighthammering pitons into
the rock, attaching links to them, and fastening
ropes to the linksto move themselves to the top.
They attacked the German defensive positions,
achieving complete surprise. German counterat-
tacks were repulsed and the division's left flank

was secured on Riva Ridge, opening the way for the rest of the division to accomplish its mission. Even though US forces achieved successes in mountainous areas during World War II, they were woefully unprepared to tackle the extreme conditions they faced in the mountains during the Korean War. Many of the Marines who succumbed to the extreme conditions of Korea were hardened combat veterans of World War II, yet the lack of extreme cold weather equipment and specialized training exacted a heavy toll on US forces. For example, although the Marines' breakout from encirclement at the Chosin Reservoir is heroic, more than half of its 6,818 nonbattle casualties resulted from frostbite and other preventable cold weather injuries.

## Present Imperative For Mountain Doctrine

Both past and modern history illustrates the need for the Marine Corps to focus on mountain doctrine and training when preparing to conduct

expeditionary operations in mountainous environ-
ments. While a mountainous environment is chal-
lenging, expeditionary forces can operate
effectively with proper training, equipment, and
organization. Marines must learn the tactics, tech-
niques, and procedures (TTP) required to con-
duct mountain operations in mountainous terrain
to be best prepared.

According to the Marine Corps Intelligence
Activity's Mid-Range Threat Estimate for 2005
2015, there are 38 states of concern in the world.
Of these, 20 are called states of interest and all
20 are located within the Arc of Instability (see
fig. 1-1). Sixteen of the 20 states of interest have
regions with elevations equal to or greater than
2,438 meters (8,000 feet) and average tempera-
tures of 40 F and below. The current and
projected threats in many of these countries cen-
ter on small, irregular forces operating in rugged,
compartmentalized terrain. The Marine Corps
Intelligence Activity expects these forces to use
the inherent advantages that mountainous terrain
and weather offer in order to negate US

3,048 meters (10,000 feet). Its climate varies from arctic cold to tropical heat, with the full range of seasonal and local extremes.

technological advantages in intelligence, surveillance, reconnaissance (ISR), and firepower. Therefore, the ability to fight both large- and small-scale contingencies against conventional and irregular, nonstate actors is paramount.

## The World's Mountainous Regions

The Andes stretch as a continuous narrow band
along the western region of South America.
Narrower than its counterpart in the north, this
range is less than 805 kilometers (500 miles)
wide; however, it continuously exceeds an ele-
vation of 3,048 meters (10,000 feet) for a distance
of 3,218 kilometers (2,000 miles).

The Eurasian mountain belt includes the Pyre-
nees, Alps, Balkans, and Carpathian ranges of
Europe. These loosely linked systems are sepa-
rated by broad, low basins and are cut by numer-
ous valleys. The Atlas Mountains of North Africa
are also a part of this belt.

The principal mountain ranges of the world lie
along the broad belts shown in figure 1-2. Called
cordillera (after the Spanish word for rope), these
ranges encircle the Pacific basin and then lead
westward across Eurasia into North Africa. Sec-
ondary, though no less rugged, chains of moun-
tains lie along the Atlantic margins of the
Americas and Europe.

Moving eastward into Asia, this system becomes
more complex as it reaches the extreme heights
of the Hindu Kush and the Himalayas. The Hima-
layas stretch over more than 2,414 kilometers
(1,500 miles) and contain 9 of the 10 tallest peaks
in the world. Just beyond the Pamir Knot on the
Russian-Afghan frontier, this range begins to fan
out across all parts of eastern Asia. Branches of

The Rocky Mountain Range, a broad mountainous region approximately 1,609 kilometers (1,000 miles) wide, dominates northwestern North America. It occupies much of Alaska, more than a quarter of Canada and the United States, and all but a small portion of Mexico and Central America. It includes extensive high plains and basins. Numerous peaks in this belt rise above this belt continue south along the rugged island chains to New Zealand and northeast through the Bering Sea to Alaska.

firm earth or grass. Grassy slopes may include
grassy clumps known as tussocks; short alpine
grasses; or tundra, which is more common at
higher elevations and latitudes. Many slopes will
be scattered with rocky debris deposited from the
higher peaks and ridges. Extensive rock or boul-
der fields are known as talus; slopes covered with
smaller rocks, usually fist-sized or smaller, are
called scree fields. Slopes covered in talus often
prove to be a relatively easy ascent route. On the
other hand, climbing a scree slope can be
extremely difficult because the small rocks tend
to loosen easily and give way; however, this char-
acteristic often makes scree fields excellent
descent routes. Before attempting to descend
scree slopes, commanders should carefully ana-
lyze the potential for creating dangerous rockfall
and take necessary avoidance measures.

Different mountain chains can have different
types of climates. Some chains are located in dry
desert regions with temperatures ranging from
extreme heat in the summer to extreme cold in
the winter. In tropical regions, small to medium
mountains are covered in lush jungles with deep
ravines that flood during the rainy season. Tem-
peratures in these areas typically remain warm
and humid year-round. Many of the mountains in
Central America and many mountainous regions
in Africa and South America that are located
close to the equator have these types of character-
istics. Conversely, high mountains in temperate
climates have sparse vegetation at elevations
above 3,505 meters (11,500 feet) and tempera-
tures can drop below freezing in winter. Some
mountainous regions have a variety of environ-
ments, such as in Afghanistan where units have
encountered several different mountainous envi-
ronments within the same area of operations.

## Mountainous Terrain

In winter and at higher elevations throughout the
year, snow may blanket slopes, creating an envi-
ronment with its own distinct effects. Some snow
conditions can aid travel by covering rough ter-
rain with a consistent surface. Deep snow, how-
ever, greatly impedes movement and requires
Marines to be well trained in using snowshoes,
skis, and over-the-snow vehicles. Steep, snow-
covered terrain presents the risk of snow ava-
lanches as well. Snow can seriously threaten per-
sonnel not properly trained and equipped for
movement under such conditions. Avalanches
have taken the lives of more personnel engaged
in mountain warfare than all other terrain haz-
ards combined.

Mountains may rise abruptly from the plains to
form a giant barrier or ascend gradually as a
series of parallel ridges extending unbroken for
great distances. They may consist of varying
combinations of isolated peaks, rounded crests,
eroded ridges, and high plains and may be cut by
valleys, gorges, and deep ravines. High, rocky
crags with glaciated peaks and year-round snow
cover exist in mountain ranges at most latitudes
along the western portion of the Americas and in
Asia. Regardless of their appearance, rugged ter-
rain is common among all types of mountains.

Mountain slopes generally vary between 15 and
45 degrees. Cliffs and other rocky precipices may
be near vertical or even overhanging. Aside from
obvious rock formations and other local vegeta-
tion characteristics, slope surfaces are usually

Commanders operating in the arctic and subarc-
tic mountain regions, as well as the upper eleva-
tions of the world's high mountains, may be
confronted with vast glaciated areas. Valleys in
these areas are frequently buried under massive
glaciers and present additional hazards, such as
hidden crevices and ice and snow avalanches.
The mountain slopes of these peaks are often gla-
ciated, with their surfaces generally composed of
varying combinations of rock, snow, and ice.

## Mountain Classifications

Although glaciers have their own peculiar hazards requiring special training and equipment, dismounted movement over valley glaciers is often the safest route through these areas.

Mountain environments are difficult to classify.
Soil composition, surface configuration,
elevation, latitude, and climatic patterns deter-
mine the specific characteristics of each major
mountain range. When alerted to the potential
requirement to conduct mountain operations,
commanders must carefully analyze each of
these characteristics for the specific mountain
region in which their forces will operate. Gene-
rally, however, mountains are classified or
described according to their elevation. For mili-
tary purposes, mountains may be classified
according to operational terrain levels and dis-
mounted mobility and skill requirements.

Different rock types, soil composition, and slope types will affect how forces are employed. For example, granite produces fewer rock falls, but its jagged edges make pulling rope and raising equipment more difficult. Granite is abrasive and increases the danger of ropes or accessory cords being cut. An in-depth analysis of individual factors that will affect operations in mountainous environments can be found in Army Training Circular (TC) 3-97.61, Military Mountaineering, and Marine Corps reference publication (MCRP) 3-35.1C, Mountain Leader's Guide to Mountain Warfare Operations.

## Elevation

Mountains are commonly classified according to
elevation, which is the height of the immediate
terrain above sea level, using the following
descriptors:

See appendix A for a discussion of altitude and environmental hazards in mountains. This appendix will provide detailed information on environmental threats unique to mountains.

## Glaciers

 Very highgreater than 3,048 meters (10,000
feet).
 High1,829 to 3,048 meters (6,000 to 10,000
feet).
 Moderately high914 to 1,829 meters (3,000
to 6,000 feet).
 Moderately low305 to 914 meters (1,000 to
3,000 feet).
 Low152 to 305 meters (500 to 1,000 feet).  Very lowless than 152 meters (500 feet).

Glaciers are rivers of ice and rocks that slowly
move down mountains. They are formed when
the rate of snowfall or other types of precipita-
tion exceeds the rate of melting in summer
months. After accumulations over hundreds of
years, the snow compresses into ice that can
range from 10 to several hundred feet thick. Gla-
ciers can be small and only cover a portion of a
mountain or they can be massive with a series of
glaciers covering a mountain range. Dismounted
movement across glaciers is often dangerous due
to icy conditions, landslides, ice falls, and deep
crevasses that often crisscross glaciers. Troops
should reference TC 3-97.61 and MCRP 3-35.1C
for movement considerations over glaciers. Gla-
ciers are a good supply of water for units on
patrol. Units can purify water and reduce the need
for aerial or ground resupply.

In general, low mountains have an elevation of
305 to 914 meters (1,000 to 3,000 feet) with sum-
mits usually below the timberline. High moun-
tains usually exceed 914 meters (3,000 feet) and
are characterized by barren alpine zones above
the timberline. Glaciers and perennial snow cover
are common in high mountains and usually pres-
ent commanders with more obstacles and haz-
ards to movement than do low mountains.

Mountain operations are generally carried out at
three different operational terrain levels (see
table 1-1). Level I terrain is located at the bottom
of valleys and along the main lines of communi-
cations (LOCs). At this level, heavy forces can
operate, but maneuver space is often restricted.
Light and heavy forces are normally combined,
since vital LOCs usually follow the valley high-
ways, roads, and trails.

Level
Description
I
Bottoms of valleys and main LOCs
II
Ridges, slopes, and passes that overlook valleys
III
Dominant terrain of the summit region

Level II terrain lies between valleys and shoul-
ders of mountains and generally consists of nar-
row roads and trails, which serve as secondary
LOCs, that cross this ridge system. Therefore,
enemy positions on level III terrain dominate and
influence the lower level II terrain. Similarly,
units will expend the energy to occupy level II
terrain because it dominates level I terrain and
influences operations dramatically.

Level III terrain includes the dominant terrain of
summit regions. Mobility in level III terrain is
usually the most difficult to achieve and main-
tain even though summit regions may contain rel-
atively gentle terrain. Level III terrain, however,
can provide opportunities for well-trained units to
attack the enemy from the flanks and rear. At this
terrain level, acclimatized personnel with
advanced mountaineering training can infiltrate

| Class                 | Terrain                                     | Mobility Requirements                        |
|-----------------------|---------------------------------------------|----------------------------------------------|
| Skill Level           |                                             |                                              |
| Required              |                                             |                                              |
| 1                     | Gentler slopes/trails                       | Walking techniques                           |
| assistance) and basic |                                             |                                              |
| mountaineers          |                                             |                                              |
| 2                     | Steeper/rugged terrain                      | Some use of hands                            |
| 3                     | Easy climbing                               | Fixed ropes where exposed Basic mountaineers |
| (with assistance from |                                             |                                              |
| assault climbers)     |                                             |                                              |
| 4                     | Steep/exposed climbing Fixed ropes required |                                              |
| 5                     | Near vertical                               | Technical climbing required Assault climbers |

to attack LOCs, logistic bases, air defense sites, and command infrastructures.

## Dismounted Mobility Classification

When conducting mountain operations, command-
ers must clearly understand the effect the opera-
tional terrain level has on dismounted movement.
Therefore, in addition to the general mobility clas-
sifications contained in MCRP 2-3A, Intelligence
Preparation of Battlefield/Battlespaceunre-
stricted, restricted, severely restrictedmountain-
ous terrain may be categorized into five classes
based on the type of individual movement skill
required (see table 1-2). Operations conducted in
the first two classes require little to no mountain-
eering skills, but operations in the other three
require a higher level of mountaineering skills for
safe and efficient movement. Commanders should
base plans and preparations for mountain opera-
tions on this type of terrain analysis, particularly
noting that class 4 terrain kills more people than
any other class because the risk the terrain poses is
less obvious than class 5 terrain.

## Weather

In general, mountain climates tend to be cooler,
wetter versions of the climates of the surrounding
lowlands. Most mountainous regions exhibit at
least two different climatic zonesa zone at low
elevations and another at elevations nearer the
summit regions. In some areas, an almost endless
variety of local climates may exist within a given
mountainous region. Conditions change markedly

Their relatively mild winters produce heavy snowfalls, while their summer temperatures rarely get excessively hot.

with elevation, latitude, and exposure to atmo-
spheric winds and air masses. The climatic pat-
terns of two ranges located at the same latitude and
in the same proximity may differ radically due to
all of these individual factors. These different pat-
terns of weather are known as microclimatization.

Mountains farther inland usually display a more
continental climate. Winters in this type of cli-
mate are often bitterly cold, while summers can
be extremely hot. Annual rainfall and snowfall in
these inland areas are far less than in a maritime
climate and may be quite scarce for long periods.
Relatively shallow snowpacks are normal during
a continental climate's winter season.

## Temperature

Major mountain ranges force air masses and
storm systems to drop significant amounts of rain
and snow on the windward side of the range. As
air masses pass over mountains, the leeward
slopes receive far less precipitation than the
windward slopes. It is not uncommon for the cli-
mate on the windward side of a mountain range
to be humid and the climate on the leeward side
arid. This phenomenon affects both coastal and
inland mountains. The deepest winter snowpacks
will almost always be found on the windward
side of mountain ranges. As a result, vegetation
and forest characteristics may be markedly differ-
ent between these two areas. Prevailing winds
and storm patterns normally determine the sever-
ity of these effects.

Normally, personnel encounter a temperature
drop of 3 to 5 F per 305-meter (1,000-foot) gain
in elevation. At high elevations, there may be dif-
ferences of 40 to 50 F between the temperature
in the sun and that in the shade, which is similar
in magnitude to the day-to-night temperature
fluctuations experienced in some deserts. Besides
permitting rapid heating, the clear air at high alti-
tudes also results in rapid cooling at night. Conse-
quently, temperatures rise swiftly after sunrise
and drop quickly after sunset. Much of the chilled
air drains downward so that the differences
between day and night temperatures are greater in
valleys than on slopes. Refer to MCRP 3-35.1D,
Cold Region Operations, for more considerations
for cold temperatures and weather phenomena.

## Wind

Wind in a mountainous environment has the following characteristics:

Mountain weather can be erratic, varying from
calm to strong winds and from relative warmth to
extreme cold within a short time or a minor shift
in locality. The severity and variance of the
weather require personnel to be prepared for alter-
nating periods of heat and cold, as well as condi-
tions ranging from dry to extremely wet. At higher
elevations, noticeable temperature differences may
exist between sunny and shady areas or between
areas exposed to wind and those protected from it.
This greatly increases every Marine's clothing
load and a unit's overall logistical requirements.
For a more detailed listing of mountain weather
considerations, see appendix B.

 In high mountains, the ridges and passes are
seldom calm, while strong winds in protected valleys are rare.

## Climate Influences

 Normally, wind velocity increases with altitude
and is intensified by mountainous terrain.
 Valley breezes moving up-slope are more common in the morning, while descending mountain breezes are more common in the evening.

Like most other landforms, oceans influence
mountain climates. Mountain ranges in close
proximity to oceans and other large bodies of
water usually exhibit a maritime climate. Mari-
time climates generally produce milder tempera-
tures and much larger amounts of rain and snow.

 Wind speed increases when winds are forced
over ridges and peaks (orographic uplift), or

## Rain And Snow

when they funnel through narrowing mountain valleys, passes, and canyons (venturi effect).

 Wind may blow with great force on an exposed
mountainside or summit.
 As wind speed doubles, its force on an object
nearly quadruples.

Mountain winds cause rapid temperature changes
and may result in blowing snow, sand, or debris
that can impair movement and observation. Com-
manders should routinely consider the combined
cooling effect of ambient temperature and wind
(windchill) experienced by their personnel (see
temperature categories in app. B).

Both rain and snow are common in mountainous
regions. Rain presents the same challenges as at
lower elevations, but snow has a more significant
influence on all operations. Depending on the
specific region, snow may occur at any time dur-
ing the year at elevations above 1,521 meters
(5,000 feet). Heavy snowfall greatly increases
avalanche hazards and can force changes to pre-
viously selected movement routes. In certain
regions, the intensity of snowfall may delay
major operations for several months. Dry, flat riv-
erbeds may initially seem to be excellent loca-
tions for assembly areas and support activities;
however, heavy rains and rapidly thawing snow
and ice may create flash floods many miles
downstream from the actual location of the rain
or snow.

## Thunderstorms

At higher elevations, air is considerably dryer
than air at sea level. Due to this increased dry-
ness, personnel must increase their fluid intake by
approximately one-third. In this environment,
equipment will not rust as quickly and organic
matter will decompose more slowly.

## Precipitation

The rapid rise of air masses over mountains
creates distinct local weather patterns. A moun-
tainous environment has the following effect on
precipitation:

 Precipitation increases with elevation and
occurs more often on the windward side than on the leeward side of ranges.

Although thunderstorms are local and usually last
only a short time, they can impede mountain
operations. Interior ranges with continental cli-
mates are more conducive to thunderstorms than
coastal ranges with maritime climates. In alpine
zones, driving snow and sudden wind squalls
often accompany thunderstorms. Ridges and
peaks become focal points for lightning strikes,
which occur most often in the summer. Although
statistics do not show lightning to be a major
mountaineering hazard, it should not be ignored
and Marines should take normal precautions,
such as avoiding summits and ridges, water,
antennas, and contact with metal objects.

 Maximum cloudiness and precipitation generally occur near 1,829 meters (6,000 feet) elevation in the middle latitudes and at lower levels in the higher latitudes.

## Traveling Storms

 Usually, a heavily wooded belt marks the zone
of maximum precipitation.
Common types of mountain precipitation include rain and snow, thunderstorms, and traveling storms.

Storms resulting from widespread atmospheric
disturbances involve strong winds and heavy pre-
cipitation and are the most severe weather condi-
tion that occurs in the mountains. If Marines

encounter a traveling storm in alpine zones dur-
ing winter, they should expect low temperatures,
high winds, and blinding snow. These conditions
may persist longer than in the surrounding low
lying areas.

## Fog

topography, fog occurs more frequently in the
mountains. The high incidence of fog makes it a
significant planning consideration because it
restricts visibility and observation, which compli-
cates reconnaissance and surveillance. Fog, how-
ever, may help facilitate clandestine operations,
such as infiltration. Routes in areas with a high
occurrence of fog may need to be marked and
charted to facilitate passage.

The effects of fog in mountains are much the same as in other terrain; however, because of the

## Chapter 2 Operations

 Avoid an overreliance on motorized and mechanized assets.
 Balance force protection requirements with the
need to operate and live among the population.
Mountain operations are normally characterized by a series of separately fought battles for the control of key terrain, such as population centers, dominating ridges and heights, and other potential avenues of approach. As a result, mountain operations in the operational environment generally require smaller unit tactics of squad-, platoon-, and company-level organizations. Due to the nature of the environment and the extreme mental and physical challenges associated with operating in the mountains, the need for detailed planning is essential. Risk management is an integral part of planning and must take place at all phases of every operation. Planning for mountain operations must be based on sound mission, enemy, terrain and weather, troops and support available-time available (METT-T) analysis of the specific operational environment. The factors of METT-T provide the standard methodology for identifying both threats and hazards, which is the first step in the risk management process (see Marine Corps Institute Publication ORM 1-0, Operational Risk Management).

## Planning Considerations

The nature of operating and maneuvering in a mountainous environment requires centralized planning and decentralized execution. The dispersion of forces is useful when conducting offensive, defensive, and stability operations in the mountains. The role of the elements of the task force in mountain operations remains unchanged, although the techniques for accomplishing the mission may vary considerably. Ground combat element (GCE) units are usually organized into highly mobile, self-sustained tactical groupings with only those weapons and equipment suited to the mission. This decentralization allows for greater flexibility and responsiveness across the operational environment. In mountainous environments, battalion-size units can increase the number of maneuver units available by reorganizing available units; for example, forming four units from the battalions' three table of organization rifle companies will enhance the battalion's ability to cover more terrain.

Forces must plan for and be able to operate for extended periods of time as independent, small units. For this reason, commanders and planners should use the information in this chapter in conjunction with Army Tactics, Techniques, and Procedures (ATTP) 3-21.50, Infantry Small-Unit Mountain Operations, and MCRP 3-35.1A, Small Unit Leader's Guide to Mountain Warfare Operations. Due to the challenging human and physical environment and an elusive, adaptive, and complex enemy, operating forces must
While this technique is useful in a compartmentalized mountainous environment, this unorthodox approach of breaking down existing units into smaller units to compensate for environmental challenges requires units to be previously trained on this method of task organization. It also requires more detailed planning and rehearsals. Maneuver commanders and planners must be aware of potential equipment constraints, reduction in unit cohesion, and command and control issues. Equipment issues will arise since existing units will be fragmented to create additional units. Unit cohesion may suffer as personnel from existing units are split and reintegrated to create

 Operate independent of forward operating
bases (FOBs).
 Command relationships that are clearly understood and facilitate the exercise of initiative by subordinates (unity of command where possible, unity of effort where it is not).
new units. Command and control may suffer significant impact due to the increased complications of having more moving pieces in the area of operations and relying on junior officers and noncommissioned officers (NCOs) to lead new units.

 Standing operating procedures that are understood and applied across the command to assure TTP excellence.
 Mobile reserves or reaction forces that are
trained to move quickly across rough compartmentalized terrain with tailored loads.
The principles of patrolling do not change in a mountainous environment (see Marine Corps Warfighting Publication [MCWP] 3-11.3, Scouting and Patrolling; ATTP 3-21.50; and MCRP 3-35.1B, Mountain Leader's Guide to Winter Operations.)

## Leadership Command And Control Considerations

To help ease their anxiety in combat, troops must have confidence in their leaders. This confidence may diminish rapidly unless leaders demonstrate the ability to lead over formidable terrain and under the most difficult weather conditions. Superficial knowledge of mountain warfare and ignorance or underestimation of mountain hazards and environmental effects may result in mission failure and the unnecessary loss of life.

The environmental factors associated with mountain operations offer unique command and control challenges. The compartmentalized terrain, expansive areas of operations, and severe environmental conditions limit communications systems and challenge command and control efforts. Large operating areas and the need to employ small unit tactics require commanders to decentralize and disperse their forces. In order to effectively command and control dispersed forces, commanders must rely on decentralized execution, which is enabled by centralized planning, mission orders, and commander's intent. Commanders must resist the micromanagement of subordinate leaders that modern communications assets enable. Effective integration of risk management is critical at each level of command in all phases of mountain operations to identify and mitigate hazards in order to enhance mission success. The following considerations apply to command and control during mountain operations:

 Warning orders that allow subordinates ample
time to prepare and plan for operations.
 Mission orders that empower subordinates and
promote freedom of action.
 Commander's intent that clearly articulates the
desired purpose.
Effective leadership in mountain operations combines sound judgment with a thorough understanding of the characteristics of mountainous environments. Commanders must first develop flexible and adaptable leadership throughout the chain of command. They must then be able to understand and exploit the operational and tactical implications of mountainous environments and their effect on personnel, equipment, and weapons. The keys to meeting this challenge are proper training and operational experience in the mountains, which requires leaders to understand the need for specialized clothing, equipment, and training. Commanders must recognize the importance of small unit leaders in preventing environmental injuries and illnesses. To fight effectively, leaders creatively exploit the opportunities offered by the mountainous environment while minimizing the adverse effects it can have on their operations. Commanders must manage risks to their forces to accomplish the mission and take care of their Marines.

## Command Posts

until the forward command post can re-establish reliable communications.

## Watch Personnel

Effective command and control of the command post requires it to remain functional despite difficulties associated with the environment, such as cold temperatures, high winds, and the effects of altitude.

## Displacement

Displacing the command post will take more time due to the effects of the environment and the terrain itself. Displacement exercises are critical. Future command post locations must be identified quickly and reconnoitered to ensure they will function effectively.

Because a mountainous environment quickly saps strength and energy, a three-watch system is recommended for command posts operating under harsh, mountain conditions. Headquarters personnel augmentation is essential to provide extra watchstanders, to assist command post displacements, and to provide more depth for security personnel. In many cases, command posts will need to provide for their own defense, especially when conducting displacement operations. Multiple command post configurations (forward, main, jump) should be rehearsed in hardstand, tentage, and mobile forms. Their displacement should also be rehearsed.

## Offensive Operations

Offensive operations in the mountains vary depending on the degree of restrictions dictated by mountains of different heights and character. Conventional mountain operations are generally conducted to gain control of key or decisive terrain. Key terrain includes LOCs, mountain passes, ridges, and chokepoints. Every attempt must be made to attack from higher elevations to lower elevations to conserve troop energy, increase movement speed, and have superior observation and fields of fire. Frontal attacks against defended heights have little chance of success. Attacks are usually made along the flanks and to the rear of the enemy. Consequently, flanking attacks and envelopments are the preferred form of maneuver.

Headquarters should configure their command posts in echelons with redundant and overlapping capabilities. Such configuration usually comprises a forward, main, and rear command post, assuming enough equipment and personnel exist to support all three. Each echelon has a primary and secondary command and control responsibility. For example, the main command post may have primary responsibility for logistic operations and movement control while the forward command post has responsibility for maneuvering forces and coordinating fire support. The main command post may have the secondary responsibility of monitoring those tactical communications nets associated with maneuvering forces and coordinating fires support so that it can assume command in the event the forward command post needs to displace or loses the ability to command and control. By organizing headquarters into a forward, main, and rear and by assigning primary and alternate command and control responsibilities to each echelon, headquarters can exercise command and control while displacing echelons.

A well-trained force using mobility skills that mitigate the effects of the mountainous environment can achieve surprise by infiltrating and attacking the enemy's rear or attacking during periods of limited visibility, such as night, rain, or Normally, the commander will position himself/ herself with the forward command element to have the best situational awareness of the battlefield. During displacement, the commander will normally pass control to the main command post snow. Marines can use helicopters and their technical mountaineering skills to conduct decisive operations throughout the area of operations. The mountainous terrain increases the threat to concentrated formations. Usually, it is difficult to coordinate all forces by time and location so they can rapidly support each other and achieve massed effects. The compartmented terrain separates adjacent units, which precludes mutual support and may adversely affect supporting distances. Therefore, it is critical to anticipate the concentration of forces and fires before the battle begins to achieve effective synchronization. The length of the preparatory phase is typically longer in a mountainous environment. Offensive action against a well-defended enemy must be based on thorough reconnaissance and orderly preparation. When planning, commanders must take advantage of the weaknesses found in the enemy's defenses. A large number of reconnaissance assets and additional time may be needed to determine the strength of enemy positions and to identify favorable routes to and beyond the objective. Difficult approach routes should be marked and prepared for safe passage. Easily traversed slopes, broad hills, plateaus, and valley floors as well as mountainous terrain with well-developed road and transportation nets create opportunities for the force to deploy in breadth. High ranges with ridges and crests leading to the objective require organization in depth with extended LOCs. Units should always attempt to have overwatch when moving in the mountains. Traveling overwatch is the preferred technique when preparing for the offense. In trackless, mountainous terrain, company-sized units usually conduct attacks. If the area assigned to a battalion permits, companies should approach the objective separately on multiple routes, never moving without overwatch on adjacent high ground. In restrictive terrain, adequate maneuver space may not always be available and several units may be required to move along the same avenue of approach. It may even be necessary to conduct shaping operations to seize terrain that dominates movement routes.

## Types Of Offensive Operations

The types of offensive operations are movement to contact, attack, and exploitation and pursuit. They are addressed in the following subparagraphs.

## Movement To Contact

Movement to contact operations in the mountains are more vulnerable to attack and ambush. Limited mobility and dependence on restrictive LOCs limit deployment of the force from movement formations. Plans and movement formations should be based on maintaining flexibility and providing continuous security. During a movement to contact, the advance guard advances in column, moving continuously or by bounds until it makes contact. While requiring less physical exertion, movement along the topographical crest of a ridgeline increases the possibility of enemy observation and should normally be avoided. Given adequate concealment, this exposure may be reduced by moving along the military crest. Ridgelines and crests can often provide a tactical advantage to the force that controls them by allowing rapid movement from one terrain compartment to another and affording excellent observation. In all cases, commanders must address the control or clearance of ridgelines that dominate their planned avenues of approach. The main body should never be committed to canalizing terrain before forward elements have advanced far enough to ensure that the main body will not become encircleda critical factor when employing mixed heavy and light forces that have sharp differences in operational tempo. Combat service support (CSS) units must be decentralized and readily available to sustain the combat elements. Major terrain compartments may physically separate maneuver units moving as part of a larger force. Continuous reconnaissance to the front and flank security is essential to prevent the enemy from infiltrating the gaps between units.

that the enemy will generally seek to control the valleys and trail networks, including adjacent slopes and high ground. The enemy will attempt to engage the attacker in the valleys and low ground with flanking fires and artillery, often in a direct fire mode. Commanders must analyze the terrain to determine not only how the enemy will organize their defensive positions, but also how the terrain might contribute to the enemy's ability to counterattack. As friendly forces attempt to deploy for the attack, the enemy, using their advance knowledge of the terrain and prepared routes, may maneuver forces to counterattack from the flank or rear.

As the enemy situation becomes better known, commanders may shorten the distance between elements to decrease reaction time or they may begin to deploy in preparation for the attack. Lateral movement between adjacent columns is frequently difficult or impossible; however, every attempt should be made to maintain at least visual contact. Connecting files or mountain pickets are effective for lateral connection. Commanders must emphasize the use of checkpoint reporting, contact patrols, and phased operations to coordinate and control the movement of the overall force. Control measures should not be so numerous as to impede operations and stifle initiative. Proper control ensures that units and fires are mutually supporting, objectives are correctly identified, and units are in position to attack. Permanent occupation of key terrain is unrealistic; therefore, engagements occur repeatedly on the same pieces of terrain. Commanders should plan to control those historic points whenever operating within their vicinity. Fixing and finishing the enemy is often accomplished by direct and indirect fire, respectively, in mountainous terrain.

## Attack

Terrain. All terrain features that can be occupied by even a small enemy force should be secured. In many instances, overwatch positions may not be readily available within the range or capability of organic weapons. Infiltration, technical climbing, and extensive breaching may be required to position weapons to support the assault. On many occasions, artillery support, especially in high mountains, may not be available. Commanders must identify fire support requirements and allocate fires based on the ability to support and available ammunition. Because resupply may be limited and extremely difficult, they may need to place restrictions on the amount of ammunition expended on specific targets. Dominating terrain may give a commander great situational awareness, while being beyond the range of fires, such as the enemy used during Operation Anaconda in the Arma Mountains of Afghanistan.

Speed, flexibility, and surprise, normally advantages enjoyed by the attacker, are limited by restrictive terrain and the defender's increased ability to see and acquire targets at greater distances. These limitations make it difficult for units above the company team level to conduct hasty attacks against prepared positions. Additional time should be allocated to conduct deliberate planning for fire support coordination, route selection, and command and control coordination.

Obstacles. Breaching obstacles and preparing bypass routes that allow the assault force to move into the defensive position must be an integral part of the commander's plan. In rugged terrain, manmade obstacles that are covered by fire create a particularly dangerous and formidable barrier. Command and control of breaching operations are more difficult than in open terrain and mobility support is extensive if the obstacle cannot be reduced. Assaults in mountainous terrain almost Planning an Attack. When planning and conducting attacks, commanders should recognize always involve preparing routes that allow the assault force to rapidly move over difficult natural obstacles and into the objectives.

The exploiting commander must compensate for the ground mobility restrictions imposed by terrain and weather. Speed can be achieved best by isolating enemy positions with the smallest force possible. Engineer support should be well forward with the necessary equipment to enable combat personnel to maintain momentum and avoid delay by enemy obstacles. The commander must be careful to prevent overextending either the exploiting force or its sustaining logistics. A withdrawing force can establish numerous delaying and firing positions on heights, quickly dissipating the combat power of the exploiting force.

## Forms Of Offensive Maneuver

The forms of offensive maneuver are common to all environments, including mountainous terrain, and only such considerations for mountain operations are addressed in the following subparagraphs. While frequently used in combination, each form of maneuver attacks the enemy in a different way and some pose different challenges to the commander when attacking in the mountains.

Raid and Ambush. The restrictive terrain of mountainous areas also affords increased opportunities to conduct raids and ambushes. These operations should take advantage of limited visibility and terrain that the enemy may consider impassable. In steep terrain, movement time increases significantly and only light equipment can be taken. The force should use special climbing techniques to negotiate the difficult routes during limited visibility. Commanders must carefully consider the routes and methods used for extraction to ensure that the combat force does not become isolated after executing the mission. They can ensure a successful operation by avoiding detection through proper movement techniques and by skillfully using natural cover and concealment. It may be necessary to reposition some indirect fire support assets to cover dead space or use attack helicopters and close air support (CAS). The ambush or raid commander must know in advance if supporting fires cannot cover his/her routes to and from the objective.

## Frontal Attack

Demonstrations and Feints. Because maneuver space is usually limited or confined and restricts the number of avenues of approach for heavier forces, deception plays an important part in the mountain battle. To mislead the enemy regarding friendly intentions, capabilities, and objectives, commanders should plan systematic measures of deception.

## Exploitation And Pursuit

The frontal attack is an offensive maneuver in which the main action is directed against the front of the enemy forces. It is used to rapidly overrun or destroy a weak enemy force or fix a force in place to support a flanking attack or envelopment. Aviation forces and supporting arms should be used to create gaps in the enemy's front or to prevent or delay enemy reinforcements from reaching the front lines. The frontal attack is generally the least preferred form of maneuver because it strikes the enemy where they are the strongest. Frontal attacks in hilly or mountainous areas, even when supported by heavy direct and indirect fires, have a limited chance of success. Mountainous terrain adds to the relative combat power of the defender, requiring that the ratio of attacking forces exceeds three to one, such as in military operations on urban terrain.

In a mountainous environment, exploitation and pursuit operations must be conducted discriminately and the commander must always prepare for success. A battalion may exploit its own success to a limited extent, but it normally participates in the exploitation as part of a larger force. Air assault and attack helicopter units can be used to augment exploitation and pursuit operations.

## Flanking Attacks, Envelopments, And Turning Movements

members of the force use the best route. Small groups are harder to detect, are easier to control, and do not compromise the total force if detected. This technique is time consuming, requires an increased number of guides and lead climbing teams, and requires an assembly area or linkup point prior to conducting the decisive action. The risk of enemy detection and of follow on groups being ambushed is greater. Movement in One Group Along One Axis. The enemy can more easily detect movement of one large group along a single axis of advance. If the force is detected, the overall mission may be endangered. This technique, however, does not require reassembling the force prior to going into the attack. Since everyone uses the same route, navigation is easier and the requirement for guides and lead climbing teams is reduced. A large force can fight out of a dangerous situation more easily than a small one. This technique also minimizes coordination problems among infiltrating units.

Flanking attacks, envelopments, and turning movements are used extensively in mountain operations. These techniques are a superior form of offensive maneuver used by the attacker to bypass the enemy's principal defensive positions. These forms of maneuver seek to avoid the enemy's strength and attack where the enemy is weakest or unprepared. The enemy's defensive positions may be bypassed using ground, air, or vertical envelopment. When conducting dismounted movements, the corridors through which the maneuver elements travel are key considerations. Commanders should place considerable emphasis on the use of mountain pickets to act as connecting files and overwatch as maneuver forces move across the valley floor in order to achieve surprise. The ability of forces to successfully execute flanking attacks, envelopments, and turning movements is enhanced by employing organizational mountaineers, airborne insertions, and air assaults.

## Infiltration

Movement in Small Groups Along Multiple Axes. Movement in small groups along several axes avoids putting the total force in danger and makes them less likely to be seen. It forces the enemy to react in many locations and makes it harder for them to determine the size of the force or its mission. The challenges associated with this technique include reassembly of the force, command and control, sustainment, and the need for more specialized training, equipment, and personnel.

## Penetration

Infiltration is frequently used in the mountains. The difficult terrain and recurring periods of limited visibility allow for undetected movement. Infiltration in a mountainous environment is used to shape the battlefield by attacking enemy positions from the flank or the rear, securing key terrain in support of decisive operations, or disrupting enemy sustainment operations. Infiltration is normally conducted using one of three techniquesmovement in small groups along one axis, movement in one group, or movement in small groups along several routes at the same time. Regardless of the technique used, units conduct tactical movement and employ noise and light discipline while leveraging existing/available natural concealment to reduce the chance of enemy contact.

Mountainous terrain normally makes penetrations extremely dangerous due to the difficulty of concentrating overwhelming combat power at the area of penetration. Due to mobility restrictions, it is also difficult to develop and maintain the momentum required to move through the point of penetration. The area of penetration is vulnerable to flank attack, especially in mountainous terrain.

## Movement In Small Groups Along One Axis. When Moving In Small Groups Along One Axis, All

A penetration may be useful when attacking an enemy that is widely dispersed or overextended in their defense. Flank defensive positions must be eliminated before the initial breach of enemy positions. Successful penetrations require surprise, security, and covered and concealed terrain at selected breach points.

## Defensive Operations

The immediate objective of a mountainous defense is to deny the enemy access to key terrain that helps them conduct further operations. Therefore, it is necessary to defend in terrain that restricts and contains the enemy as well as to control the high ground that dominates this terrain. The terrain provides the defender with cover, concealment, and camouflage that can deceive the enemy regarding the strength and dispositions of friendly forces. The defender should know the terrain, control the heights, fortify positions, site weapons in advance, stockpile supplies, and prepare lateral trail networks to allow for mobility. Restrictive terrain inherent to mountainous areas is one of the primary advantages of the defender because it interferes with the attacker's synchronization, canalizes the attacker's movement, and impedes the attacker's ability to maneuver. To capitalize on this advantage, commanders should carefully analyze the vertical and horizontal components of terrain from both friendly and enemy viewpoints. While a screening force is usually considered to be the preferred form of security in rugged terrain, all forms of security operations (screen, guard, and cover) may be employed. The following points should be considered when conducting security operations:

 Forces available for security operations.  Ability to maintain a mobility advantage.  Size of the security area and the number of
avenues of approach.
 Likelihood of enemy action.
 Size of the expected enemy force.  Amount of early warning and reaction time
needed.
A screening force provides early warning to the protected force and is usually an economy-offorce measure. The compartmented nature of mountainous terrain can lead to gaps and exposed flanks. The rugged terrain also restricts movement of both friendly and enemy forces. In these instances, commanders may choose to use minimum combat power to observe, identify, and report enemy actions at these locations and engage and destroy enemy reconnaissance within the screening force's capability. The screening force can avoid being decisively engaged by withdrawing into restrictive terrain. In mountainous terrain, the screening force should adjust to the enemy advance and continue to screen as far forward as possible, even though elements of the force may have to withdraw. Retention of selected forward positions may allow surveillance and targeting forward of the area of operations, upsetting the enemy's coordination. By allowing the enemy to bypass advance positions, the screening force can facilitate a counterattack since it can observe and access the flanks and rear of the attacking forces. If a significant enemy force is expected or a significant amount of time and space is required, commanders may employ a guard or covering force. Security forces that can maintain a mobility advantage over the enemy can effectively delay and counterattack the enemy force. The appropriate use of a guard or covering force provides greater depth in the security area. Defending forces must prevent enemy infiltration by carefully positioning observation posts and conducting continuous patrols and ambushes. Reconnaissance patrols may rely heavily on technical climbing skills. Ground surveillance radar and ground sensors can be used to add greater depth to the defense.

## Motti Tactics

Motti tactics demonstrate how forces can exploit superior mobility skills and knowledge of both snow-covered and mountainous terrain and the environment to defeat an enemy that is road bound. The Motti is a double envelopment maneuver, using the ability of light troops to travel over rough ground to encircle and cut off road-bound enemy forces. Forces with superior mobility can easily immobilize a larger enemy force. Motti tactics were used extensively by Finland's forces in the Russo-Finnish War of 19391940. This tactic was extremely effective against many of the mechanized units of the Soviet Army that were restricted to the long and narrow forest roads. Due to their poor training and limited mobility, the Russian forces remained road bound and vulnerable to the more mobile and highly trained Finnish units. Unlike the mechanized Russian units, the Finnish troops moved quickly through the forests on skis to break the armored columns into small chunks, such as by felling trees along the road. Once a large column was split up into smaller units, the Finns attacked the isolated Soviet units. By cutting Soviet columns into smaller groups and then encircling them with light, mobile forces, the Finnish army was able to overwhelm a much larger force. Generally, a force using Motti tactics avoids becoming decisively engaged. It disrupts the enemy's supply lines, denies them warmth and shelter, infiltrates their bivouacs, and destroys their rear areas to the point where they must remain in a high state of alert. These attacks, in combination with the environment, help to destroy the enemy's will to fight. Commanders should not only develop a thorough understanding of how to apply these tactics, but also understand the conditions that may leave their own forces vulnerable to their use. Motti tactics generally follow the sequence of

 Locating and fixing the enemy.  Isolating the enemy.  Attacking to defeat or destroy the enemy.
Reconnaissance is conducted to locate an enemy force moving in or toward an area that will restrict their movements to roads, trails, or linear terrain. Once identified, the force must be fixed so that it presents a linear target along the axis of advance to which it is bound by using obstacles and a series of squad- and platoon-sized ambushes and raids. Obstacles may be natural (snow, crevices, deep mud, steep terrain, and water obstacles) or manmade (mines, landslides, avalanches, or destroyed bridges). The ambushes and raids not only fix the enemy, ambushes and raids also disturb the enemy's composure, create an air of uncertainty, and prevent uninterrupted sleep and rest. Attacking units attack the enemy from the high ground. They make maximum use of night vision devices as well as the difficult restrictive terrain. They avoid enemy security and interdict the enemy's operations. As a further result of these actions, the enemy is compelled to use more forces on security tasks. Unless the enemy can be easily defeated or destroyed, the attacking force rapidly withdraws after forcing the enemy to deploy. In general, this series of attacks confuses the enemy as to the attacking unit's exact location and intent and slows the enemy's decisionmaking cycle so that the enemy reacts ineffectively to subsequent operations. The attacking force then isolates the enemy into smaller groups. Once isolated, the attacking force maneuvers to envelop and attacks to defeat or destroy the isolated elements. As the enemy becomes exhausted in an effort to break out, the attacking force may regroup and repeat the sequence. It is imperative that the attacking force seal off the enemy, keep avenues of approach closed, and not ignore the threat to its flanks, which may increase as the attack progresses. Overall, Motti tactics wear the enemy down to a point where the enemy is vulnerable to more direct attacks or to the point where it is no longer beneficial or feasible to continue operations in the area. Motti tactics employed alone only prove decisive over a long period of time, depending on the enemy's capabilities, strength, and resolve. Based on METT-T, friendly forces must normally increase the operation's tempo to gain a quick, decisive outcome. Still, this tactic may complement other more direct offensive operations in support of the overall plan. In sum, forces can use Motti tactics when they

 Have superior technical mobility skills necessary to negotiate Class 4 and 5 terrain.  Are able to operate effectively in a noncontiguous area of operations with limited support and despite temperature
extremes and inclement mountain weather.
 Are able to navigate in high, mountainous terrain, dense vegetation, darkness, storms, and fog while making good
use of available cover and concealment.
 Maintain the element of surprise.
Forces are vulnerable to Motti tactics when they

 Operate within noncontiguous areas of operations.  Have limited mobility skills, restricting their movements to roads, trails, and Class 1 and 2 terrain.  Have inadequate reconnaissance and security.
Defensive positions along ridges or on dominating heights should include both forward and reverse slopes to add greater depth and security. Fighting positions and observation posts should be echeloned vertically as well as in depth. When defending a mountain valley, forces should establish fighting positions that are located on adjacent heights and in depth to permit covering the valley with interlocking fires. Defensive positions must be anchored to restrictive terrain or adjacent defensive forces to prevent enemy infiltration or envelopment. In wooded terrain, defensive positions may be organized on the forward edge of the woods, as well as on commanding heights. Obstacles should be widely employed to slow or stop enemy movement. Mountain warfare demands that forces defend aggressively. Defending units must infiltrate enemy units and attack headquarters, supply lines, and rear areas. Small patrols and observation posts should be deployed well forward to direct artillery fire and attack aircraft on targets of opportunity and to conduct personnel and antiarmor ambushes. Operations should be conducted to force the enemy to deploy additional assets and to disrupt preparations. Commanders may need to rely on their reserve as the principal means of restoring a defense's integrity or exploiting opportunities through offensive action. Because of the difficulties of movement, small reserves may be located near primary defensive positions, ready for immediate counterattack. This type of small, responsive counterattack may be much more effective than a large-scale, major counterattack. Large, centrally-placed counterattack forces are normally unable to intervene in time unless the terrain permits mounted movement or sufficient helicopter lift assets are committed to the reserve force or made rapidly available. Reserves should be mobile enough to react to enemy action in any portion of the perimeter. Less mobile reserves are positioned to block the most dangerous avenues of approach and are assigned on-order positions on other critical avenues.

Sharply compartmented terrain may require the creation of more than one reserve. To minimize the vulnerability of sustaining operations, sustainment resources must be dispersed, redundant, and as far from enemy approaches as possible. Because of limited space available in rear areas, the commander must carefully select and locate positions for CSS/sustainment unit activities. These positions are likely to be confined to small valleys. A perimeter defense is planned for each operating base within the defensive area. Defensive positions should be selected on the dominating high ground. Sensors, observation posts, and radars are used to cover avenues of approach and gaps between positions. More information on perimeter defense is available in ATTP 3-21.50; MCRP 3-35.1A; and FM 3-90, *Tactics*. There are three fundamental types of defense: mobile, position, and retrograde.

## Mobile Defense

In a mobile defense, the defender withholds a large portion of available forces for use as a striking force in a counterattack. Mobile de-fenses require enough depth to let enemy forces advance into a position that exposes them to counterattack. The defense separates attacking forces from their support and disrupts the enemy's command and control. As enemy forces extend themselves in the defended area and lose momentum and organization, the defender surprises and overwhelms them with a powerful counterattack. The counterattack focuses on destroying the attacking force by permitting the enemy to advance into a position that exposes them to counterattack and envelopment. The commander commits the minimum possible combat power to his/her fixing force that conducts shaping operations in order to control the depth and breadth of the enemy's advance. The fixing force also retains the terrain required to facilitate the striking force's decisive counterattack.

A mobile defense relies heavily on the defender's ability to maintain a mobility advantage. This mobility advantage may result from or be enhanced by countermobility actions directed against the enemy force. In his/her mobile defense plan, the commander seeks to ensure that his/her forceincluding reserves and the striking forcecan move freely around the battlefield, while restricting the enemy's mobility, slowing their momentum, and guiding or forcing them into areas favorable for engagement. Mountainous terrain favors the defender because of its many chokepoints and fire sacks. Chokepoints have limiting terrain on two sides and fire sacks have limiting terrain on three sides.

## Position Defense

A position defense focuses on retaining terrain by absorbing the enemy into a series of interlocked, mutually supporting positions. Mobility restrictions and the requirement to control key terrain favor position/area defenses. Defending forces are relied upon to maintain their positions and to control the terrain between them. This defense uses battle positions, strongpoints, obstacles, and barriers to slow, canalize, and defeat the enemy attack. Position defenses rely on security forces, continuous reconnaissance and combat patrols, and numerous observation posts for depth and early warning. The natural canalization effect of mountainous terrain offers tremendous advantages in the defense. In a position defense, the commander positions the bulk of his/her combat power in static defensive positions with small mobile reserves. He/She depends on his/her static forces to defend their positions and on his/her reserves to blunt and contain penetrations, to counterattack, and to exploit opportunities presented by the enemy. Helicopters may be used to deploy reserves, but their use depends on the availability of suitable, secure landing zones (LZs) and favorable weather conditions. Commanders must prevent the enemy from concentrating overwhelming combat power against isolated sections of their defense. Reverse slope defenses (see fig. 2-1) are wellsuited to mountain operations. Reverse slope defenses seek to reduce the effects of massed indirect fire from mortar, artillery, and CAS and draw the battle into the small arms range of infantry weapons. The overall goal of the reverse slope defense is to make the enemy commit their forces against the forward slope of the defense, causing them to attack in an uncoordinated fashion across the exposed topographical crest. All or parts of the defending force may use reverse slope techniques. In many instances, mountainous terrain favors a defense that employs both forward and reverse slope positions to permit fires

## Stability Operations

on enemy approaches around and over the crest and on the forward slope of adjacent terrain features. Key enablers to this type of defense are

 Mutually supporting covered and concealed
positions.
 Numerous natural and manmade obstacles.  The ability to bring fire from all available
weapons onto the crest.
 A strong and mobile counterattack force.
Cultural understanding is fundamental to planning stability operations in the mountains. Although challenging in the mountains, commanders can develop situational understanding by circulating throughout their operational areas as often as possible, talking with their Marines, making observations, and communicating with the local populace and other actors operating in the area. These activities will aid Marine forces in overcoming local suspicion of outsiders and establishing the personal bonds of trust with local leaders.

## Civil Considerations

Generally, civilian population centers will be located at the lower elevations of Level I close to sources of water and along major LOCs. Refugees and displaced civilians may increase congestion on the already limited road and trail networks normally found in mountainous environments, further complicating maneuver and sustainment operations.

The reverse slope defense is organized so that the main defensive positions are masked from enemy observation and direct fire by the topographical crest. It extends rearward from the crest only to the maximum effective range of small arms fire. Observation and fires are maintained over the entire forward slope as long as possible to continue to destroy advancing enemy forces and prevent them from effectively massing for a final assault. A successful reverse slope defense is based on denying the topographical crest to the enemy, either by fire or by physical occupation. Although the crest may not be occupied in strength, control of the crest by fire is essential for success.

## Retrograde

Retrograde operations in the mountains require fewer assets to delay an advancing enemy. Numerous positions may exist where elements as small as a machine gun or sniper team can significantly delay a large force. When conducting retrograde operations in mountainous terrain, the friendly force must
Commanders must also consider the impact of operations on the often limited civilian resources available in the mountains. The wisdom of using local resources to lighten in theater supply requirements must be balanced with the impact on civilians and their local economy. While the purchase of goods and services from the local economy is generally welcomed, it may serve to inflate prices and make it impossible for local civilians to purchase their own scarce and needed supplies.

 Make maximum use of and reinforce existing
obstacles.
 Conduct detailed reconnaissance of routes to
rearward positions. Routes of withdrawal are not as numerous in mountainous terrain and often do not intersect as they do on flat terrain. These factors complicate subsequent linkup operations and necessitate meticulous planning.
 Protect the flanks and rear to prevent encirclement, particularly by air assault.
In mountainous regions, commanders often encounter a populace of diverse political and ethnic orientation that may support, oppose, or be ambivalent to US operations or the presence of US forces. Depending on friendly force objectives, commanders may conduct public relations, civil affairs, humanitarian assistance, and military information support operations to influence perceptions and attitudes of neutral or uncommitted parties. Even if commanders choose not to commit The DSF consistently maintains focus on the local populace. Organizations using the tactical conflict assessment and planning framework follow a continuous cycle of see-understand-actmeasure. The DSF includes four distinct, but interrelated, activities
resources to enlist civilian sympathy and support, they must still adjust their operations to minimize damage and loss of life to innocent civilians. Homogeneous mountain communities are susceptible to greater influence from external forces/factors than the more heterogeneous communities found in less compartmented terrain.

 Situational awareness.  Analysis.  Design.  Monitoring and evaluation.

## Situational Awareness

Due to the restrictive nature of the terrain, mountain communities may quickly become safe havens for enemy activity and bases of support. Where combat typically focuses on the defeat or destruction of an enemy force, the focus of stability operations is the populace.

Situational awareness of the causes of instability within an operational area is a four-step process

## District Stability Framework

 Identify stability and instability.  Understand the cultural environment.  Apply instability and stability dynamics.  Understand perception dynamics.
The following four questions of the tactical conflict survey are very useful when drawing critical information from the local populace:
Successful stability operations are predicated on identifying and reducing the causes of instability and re-establishing or building community and state capacity to diminish, manage, or prevent future instability. The District Stability Framework (DSF) is a tool that can be effectively used to assess the causes of instability in an isolated mountain community.

 Has the population of the village changed in
the last 12 months?
 What are the greatest problems facing the village?
 Who do you believe can resolve problems?  What should be done first to help the village?
Targeted interviews should be conducted with key local stakeholders, such as traditional leaders, government officials, business leaders, and prominent citizens.

The DSF was developed by the United States Agency for International Development and has been successfully used in various theaters to identify, prioritize, and target the causes of instability in a measurable and immediately accessible way. Since it makes maximum use of assets in the field and measures the effectiveness of activities over time and across multiple unit rotations, it is an important tool for conducting stabilization operations. The DSF is based on the following four tenets:

## Analysis

 Instability results when the factors fostering
instability overwhelm the ability of the host nation to mitigate these factors.
 Assessment is necessary for targeted and strategic engagement.
 The population is the best source for identifying the causes of instability.
 Measures of effectiveness are the only true
measure of success.
During analysis, the information gained through situational awareness is compiled in a graphical display to help identify the main concerns of the population and to serve as a reference point for targeted questioning. The DSF data is combined with input from other staff sections and other sources of information, such as intergovernmental organizations, nongovernmental organizations, and private sector entities. All this input is used to create a prioritized list of the causes of instability and sources of resiliency that guide the conduct of stability operations.

## Design

The design effort is informed by analysis. The results of which are used to create a tactical stability matrix for each of the causes of instability. After identifying the causes of instability and sources of resiliency, a program of activities is designed to address them. Three key factors guide program design to ensure program activities accomplish the following:

 Increase support for the host-nation government.  Decrease support for antigovernment or insurgent elements.
 Build host-nation capacity and capability
across each of the stability sectors.
The tactical stability matrix and program activities form the basis for planning within an operational area. The plan targets the least stable areas and ensures instability is contained. It is nested within the higher headquarters plan and details how specific stability tasks will be integrated and synchronized at the tactical level. The DSF data is collated at each echelon to develop or validate assessments performed by subordinate elements.

## Monitoring And Evaluation

The DSF provides a comprehensive means of evaluating success in addressing the sources of instability. Through monitoring measures of effectiveness, analysts gauge progress toward improving stability while diminishing the sources of instability. Monitoring measures of effectiveness and overall stabilitythe key component of the DSF processare vital to evaluating the success of program activities in changing the state of the operational environment envisioned during the design effort.

While evaluation is critical to measuring the effectiveness of activities in fostering stability, it also helps to ensure that the views of the population are tracked, compared, measured, and displayed over time. Since these results are objective, they cannot be altered by interviewer or analyst bias, creating a continuous narrative that significantly increases situational awareness. For more information on stability operations see FM 3-07, *Stability Operations*; United States Agency for International Development; and MCWP 3-33.5, *Counterinsurgency*.

## Operational Advantages And Disadvantages

The forms of maneuver and types of offensive operations will not change for mountainous environments; however, there are unique elements that must be considered before conducting offensive operations. Like all other environments, one of the primary advantages of conducting offensive operations is that the attacker can choose when and how to attack. This point is emphasized even further in the mountains due to the many avenues of approach to a tactical objective, limited ground LOCs the defender has to rely upon for sustainment, and the difficulty the defender faces in constructing defensive positions. Despite these offensive advantages, the aggressor is usually at a disadvantage in the mountains because the mountainous terrain favors defensive operations. The primary advantage to the defender in mountainous terrain is the ability to choose defensive positions that will canalize offensive forces, denying the attacking force the ability to maneuver effectively. If the defender controls the heights, observation will preclude the attacking force from achieving surprise. Both observation and canalization will give the defender the opportunity to mass fires in order to defeat or destroy the enemy; however, if the attacking force is highly trained and able to negotiate the complicated mountainous terrain, the advantages the defender gained will be nullified.

## Planning And Intelligence Preparation Of The Battlespace

Existing intelligence processes will be used in mountainous environments. Marines should reference MCRP 2-3A for further details on determining environmental effects, identifying hazards, and managing risks in an area of operations. Intelligence preparation of the battlespace (IPB) is designed to support threat-based risk assessments by identifying opportunities and constraints in the battlespace for both enemy and friendly forces. It is a dynamic staff process critical to identifying enemy threatone of the factors in METT-T and mission variables and assists commanders in their decisionmaking process. The Marine Corps uses operational risk management as its primary decisionmaking process to mitigate risks associated with any hazard that may injure or kill personnel, damage or destroy equipment, or otherwise impact mission effectiveness. For the Marine Corps, risk management is an ongoing process that continues from mission to mission. Within the mission, leaders must know when the process begins and who has responsibility. Such knowledge must be integral to the military decision.

Conducting stability operations in mountain population centers establishes conditions that enable the efforts of the other instruments of national and international power. By providing the requisite security and control to stabilize an operational area, those efforts build a foundation for transitioning to civilian control and, eventually, to the host nation. Military forces operating in this environment seek to establish or restore basic sustainable civil functions and protect them until a civil authority or the host nation is capable of providing these services for the local populace. In many cases, the restrictive terrain and cultural barriers found in isolated mountain communities will prevent the host nation from fulfilling its role. Military forces may be called upon to significantly increase their role to include providing the basic civil functions of government. This slow development process of government reconstruction and stabilization may become frustrating and difficult to manage as units and commanders cycle through deployments to mountainous operational environments. Integrating the planning efforts of all the agencies and organizations involved in a stability operation is essential to long-term peace.

## Chapter 3 Intelligence

intelligence knowledge, planners must conduct the following tasks:

 Develop the foundation to define threat characteristics.
 Obtain detailed terrain information and intelligence.
 Obtain detailed weather and weather effects
information and intelligence.
 Obtain detailed civil considerations information and intelligence.

This chapter discusses specific effects of moun-
tainous environments on intelligence operations
by concentrating on two areas of the intelligence
processplan and collect. The Marine intelli-
gence cycle discusses plan and collect activities.
These activities are impacted by mountainous
environments, such as when the environment lim-
its communication. Mountain operations also
present unique challenges in waging irregular
warfare due to the compartmentalized terrain.
Intelligence references include

 Complete studies.
 FM 3-55, *Information Collection*, which discusses ISR measures.
 Army ATTP 2-01, Planning Requirements and
Assessing Collection, for more specifics
regarding ISR synchronization.
 MCWP 2-2, *MAGTF Intelligence Collection*.

The results of each of the first four tasks are trans-
lated into a database or data files based on the
commander's guidance to support the commander
(see FM 2-0, Intelligence, and MCWP 2-1, Intelli-
gence Operations, for more details).

The Marine Corps uses the generic term ISR
assets for all units, personnel, and equipment that
conduct ISR activities. Therefore, in order to
maintain ease of reading and limit redundancy
throughout the rest of this publication, the term
ISR assets will be used.

## Planning

Planning is conducted to identify intelligence
requirements, plan intelligence operations, and
support the formulation of the commander's esti-
mate of the situation. In this phase, intelligence
gaps are identified and collection is planned to
satisfy those intelligence gaps. The effects of
harsh weather and compartmented terrain make
accuracy and efficiency in the planning and
direction phase critical to intelligence operations
in mountainous environments. Planners must
also note that caves will be used extensively in
mountainous environments and should refer to
ATTP 3-21.50 and MCRP 3-35.1C.

Generating intelligence knowledge begins before
the mission is received and provides the relevant
knowledge required regarding the operational
environment for the conduct of operations. It is
the foundation for performing IPB and problem
framing. Its primary products are the initial data
files and the intelligence survey. To generate

The ISR plan faces numerous challenges and can
take much longer to execute because of poor traf-
ficability, severe weather conditions, and the rug-
ged nature of the topography. Caves, overhangs,

crevices, gorges, boulders, and crags all afford
excellent cover and concealment for the enemy.
These unique terrain conditions pose multiple
problems for ground commanders and their staffs
in maneuver and security. High altitudes and
extreme weather conditions impact negatively on
the ability of aerial platforms and all types of
imaging systems. As a result, commanders and
their staffs must allow significantly more time for
reconnaissance and surveillance in this unforgiv-
ing environment. Emphasis must be placed on
confirming data collected from sensors and ter-
rain analysis tools. These tools provide intelli-
gence personnel with valuable data, but that data
can lack sufficient detail. Mountain weather phe-
nomena are localized, which increases the
requirement for meteorological (MET) teams.
Due to the decentralized nature of mountain oper-
ations, MET teams need to be pushed down to the
battalion level if assets are available. Intelligence
personnel cannot rely on regional forecasts when
conducting planning.

The relative inaccessibility of most mountainous
terrain places severe demands on the maneuver-
ability of troops. In this environment, the use of
ISR assets to verify trafficability, identify routes
that support the movement of dismounted and
mounted elements, and maintain friendly situa-
tional understanding for commanders and their
staffs can be critical to the success of an opera-
tion. Constant surveillance of the limited routes
and avenues may contribute greatly to situational
awareness. While the ideal solution is to main-
tain constant surveillance in a mountainous envi-
ronment, leaders must realize that doing so will
consume significant resources, which could
impact the number of available named areas of
interest that can be monitored. Even if no intelli-
gence is gathered while surveying an area of
interest, there is a greater chance of operational
success if maneuver forces know that enemy
forces have not been operating in the battlespace.

Combat in mountainous environments also pres-
ents commanders and their staffs with the chal-
lenges of locating and defeating an enemy who

may be arrayed in multiple tiers along the slopes
of key terrain, such as a critical mountain pass,
dominating height, gorge, or trail. Since the
restrictive terrain often does not support massing
combat power against decisive points, command-
ers and their staffs need to use the ISR plan to pre-
cisely focus the maneuver assets and fire support.

## Collection

Collection, complicated by a mountainous envi-
ronment, consists of the activities of organic,
attached, and supporting ISR assets to gather new
data and deliver it to the appropriate processing
or production agency. Though all ISR assets can
be hindered by weather/terrain, troops can consult
intelligence personnel for ISR capabilities and
limitations, if necessary. An example of such data
is presented in appendix C. Usually, however,
intelligence personnel will conduct ISR synchro-
nization to assist the operations personnel with
the production of the ISR annex for the opera-
tions order. The ISR plan outlines the collection
effort in response to the commander's critical
information requirements.

## Human Environment

Mountain populations exhibit certain traits that
will significantly impact operations. While there
will be variations depending on the location of
the operation, case studies have revealed some
generalizations that distinguish mountain popula-
tions from other populations. These variations
include the following traits:

 Independent.  Enhanced loyalty to their group.  Homogeneous.  Tribal/clannish.  Increased emphasis on religion.  Less economically developed than more accessible areas.
 Lacking formal education.
 Adherence to a strict social code.  Different norms to determine economic status.  Less infrastructure.  Decreased access to information.  Less emphasis on centralized governance.

is no official doctrine, regulation, or table of
organization and table of equipment (TOE) out-
lining the roles, responsibilities, and number of
analysts assigned to the company. Recent lessons
learned, however, have led to the production of
handbooks that can be used by troops to aid in
operations, such as Army TC 2-19.63, Company
Intelligence Support Team, to assist with com-
pany level intelligence operations. Companies
must also have access to and develop shared data-
bases that help them identify key members of
mountain communities.

## Irregular Warfare Considerations

While individual mountain populations tend to be
homogenous due to the compartmentalized ter-
rain, the districts/provinces/states in which they
reside tend to be heterogeneous. Clans or tribes
from one valley may differ from those in the
next. The operational impact is that small unit
leaders are forced to conduct functions that are
normally done at the battalion level and higher.
As a result, assets are being pushed to lower lev-
els to compensate for this operational need. For
example, the company level intelligence cell will,
in most cases, pull information from human envi-
ronment databases.

The composition of such small units is not uniform and depends upon the mission of the parent unit. Since this is an emerging requirement, there

To facilitate intelligence activities in support of
irregular warfare, intelligence planners in a
mountainous environment select teams of ana-
lysts who examine and share information pro-
vided by different field elements. Much like
journalists, these analysts will collect informa-
tion from the grass roots level and incorporate

## Operation Red Wings Population Analysis

The local population encountered in Operation Red Wings rank among the poorest as well as the most insular in all of Afghanistan and the world. Subsistence farming and basic trade define the area's economy. Few health care and educational facilities exist;
mosques serve virtually all community functions, with community leadership flowing from village elders. Historically, this part of Kunar Province was the southernmost aspect of a region known as "Kafiristan" (land of the 'Infidel'), the last part of Afghanistan to convert to Islam under the harsh rule of Emir Abdur Rahman Khan (the "Iron Emir"), a Pashtun who led Afghanistan from 1880 through 1901 and forced conversion of all non-Muslims. Post-conversion, the isolated villages in this area adopted some of the hardest line Salafist Islamic ideology not only in Afghanistan, but in the world. The people here call themselves the "Safi" (the Pure). While part of modern day Kunar Province, this region (former "Kafiristan") was part of what became Nuristan ("Land of Light," that is, "Land of the Enlightened Ones"). Many people in this region, who are part of an ethno-linguistic group called Pashai, speak their own language; for example, Korangalese, a Sanskrit/Pashai-rooted language, is spoken only in the Korangal Valley. Traditionally, the people in this region have staunchly resisted outside forces. More recently, however, they show a propensity for aiding anticoalition militia forces vice cooperating with coalition forces. A large measure of this chosen insularity derives from their "world view." Their "world" is defined by bounding topographic featuresridges and peaksabove their tiny valley, with no communication with or knowledge of the outside world. Their isolation, fierce independence, and hard-line Islamic fundamentalist beliefs proved a deadly combination for Afghan communist and Soviet occupation forces in the 1980s. The Chowkay Valley, for instance, was known as the "Valley of Death" and also
"The Valley of Islam" by Soviet troops during the Soviet-Afghan war. The Soviets controlled the main supply route (MSR) in the larger regionas they did throughout much of Afghanistanbut never the "high ground" of this part of the area of operations. Many of the people in this part of Regional Command-East simply resisted the concept of a centralized government. They even pushed back against the Taliban in their attempts to unify Afghanistan under their rule. They will give aid to outsiders; however, they will fight against those the locals perceive as trying to control them from afar, such as US and coalition forces and the Government of the Islamic Republic of Afghanistan entities.

that information at their command level. For
example, they integrate information collected by
civil affairs officers, provincial reconstruction
teams, liaison officers (LNOs), female engage-
ment teams, military information support opera-
tions teams, human terrain teams, and infantry
battalions into a shared database.

Leaders and planners must put time and energy into selecting the best, most extroverted, and most eager analysts to serve in the fusion cells. The highly complex mountainous environment requires an adaptive way of thinking and operating, such as vetting a single source from one tribal valley compartment against the adjacent terrain/ tribal compartment. These efforts also facilitate stability operations by allowing the commander to better respond to the needs of the populace.

## Reconnaissance And Surveillance

At the beginning of a campaign in a mountainous
environment, requirements will usually be
answered by aerial or overhead platforms using
radar systems to detect manmade objects. Ter-
rain may significantly impact the employment of
overhead reconnaissance platforms. These sys-
tems may be adversely impacted by the masking
effect that occurs when mountainous terrain

## Operation Enduring Freedom: Nuristan

The Nuristan region is divided into three zones: western, central, and eastern. These zones include Northern portions of Konar Province and correspond to the major North-South oriented valley systems that divide the region into its three distinct parts. These divisions make central administration extremely difficult and population movements will generally follow this North-South axis. The extraordinarily complex socio-cultural environment in the Nuristan region has greatly inhibited the ability of the central government and their partners to put into action policies and institutions that are representative of local traditions and are viewed by the local population as being beneficial rather than imposing. To further complicate efforts, the form of Islam practiced in the Nuristan region is markedly different from that practiced in other regions of Afghanistan. This difference is partly explained by the fact that Islam arrived to this region in the late 1800s, later than other areas of Afghanistan and was forced on the tribes of Nuristan by the Afghan government. After a few decades of pronounced resistance by traditionalists, the people of Nuristan seemed to enthusiastically embrace the practice of Islam. In fact, people began sending their children to madrassas in Pakistan where they were exposed to what many would now call more radical schools of thought. Many of these children returned to Nuristan after their education and spread their understanding of the religion. As a result, the type of Islam practiced in this region was markedly different from that practiced in other regions of Afghanistan, which tends to be more tempered and in line with Pashtun traditionalism.

blocks the radar beam, so radar coverage may not
extend across the reverse slope of a steep ridge or
a valley floor. Attempts to reposition the over-
head platform to a point where it can "see" the
masked area may result in masking occurring
elsewhere. This limitation does not preclude
using such systems; however, commanders and
their staffs should employ air reconnaissance
with overhead reconnaissance platforms, such as
balloons and satellites, when available to mini-
mize these occurrences.

The subsequent use of ground reconnaissance
assets to verify the data that can be gathered by
overhead and electro-optical platforms will
ensure that commanders do not fall prey to delib-
erate enemy deception efforts that capitalize on
the limited capabilities of some types of over-
head platforms in this environment. In mountain-
ous areas of operations, it may often be necessary
to commit ground reconnaissance assets to sup-
port strategic and operational information
requirements. Conversely, strategic and opera-
tional reconnaissance systems may be employed
to identify or confirm the feasibility of employing
ground reconnaissance assets. Surveillance teams
may be inserted to gather information that cannot
be collected by overhead systems or to verify
data that has already been collected. In this
instance, satellite imagery is used to analyze a
specific area for inserting the team. The potential

hide positions for the teams are identified using imagery and, terrain and weather permitting, verified by unmanned aircraft systems (UASs).

 Level of mountaineering skill required to negotiate routes (dismounted mobility classification) and sections of the route that require specific mountaineering equipment, tools, or facilities (e.g., bivouac sites, tents, and huts) as well as mountaineering installations (e.g., fixed ropes or raising/lowering systems).
 Trafficability of existing trails and routes to
support sustained military movement requirements and an engineer estimate of the effort required to improve/maintain this capacity.
 Location of enemy obstacles/barriers, including
minefields, and feasibility of breach or bypass.
 Bypass routes.  Potential airborne and air assault drop zones
and/or pickup zones (PZs) and aircraft landing areas.
 Location of locally available engineer resources, such as construction materials, borrow pits, water, and construction equipment.

## Operational Considerations

On harsh mountainous terrain, ground recon-
naissance operations are often conducted dis-
mounted. Commanders and their staffs must
assess the slower rate of ground reconnaissance
elements to determine its impact on the entire
reconnaissance and collection process. They
must develop plans that account for this slower
rate and initiate reconnaissance as early as possi-
ble to provide additional time for movement (see
chap. 4 for movement planning tools). Com-
manders may also need to allocate more forces,
including combat forces, to conduct reconnais-
sance, surveillance, or limited objective attacks to
gain needed intelligence. Based upon METT-T,
commanders may need to prioritize collection
assets, accept risk, and continue with less infor-
mation than from their initial reconnaissance
efforts. In these cases, they must use formations
and schemes of maneuver that provide maxi-
mum security and flexibility, to include robust
security formations, and allow for the develop-
ment of the situation once in contact.

Although reconnaissance patrols should nor-
mally use the heights to observe the enemy, they
may need to send small reconnaissance teams
into valleys or along the low ground to gain suit-
able vantage points, conduct countersurveillance
(as mountain villages often serve as a network of
informants on friendly movements), or physi-
cally examine routes that will be used by mecha-
nized or motorized forces. In mountainous
environments, reconnaissance elements are often
tasked to determine

Snow can pose a serious threat to Marine Corps
units not properly trained and equipped for
movement under such conditions: avalanches
have taken the lives of more troops engaged in
mountain warfare than all other terrain hazards
combined. Reconnaissance units must do a thor-
ough reconnaissance of the battlespace to deter-
mine areas where avalanches and rockslides are
most prevalent and most likely to hinder mobil-
ity. This information should be included in their
reconnaissance overlays in order to generate a
full picture for the commander (see chap. 5 for
mitigation procedures).

 The enemy's primary and alternate LOCs.

## Reconnaissance In Force

 Locations and directions from which the
enemy can attack or counterattack.
 Heights that allow the enemy to observe the
various sectors of terrain.
 Suitable observation posts for forward observers.  Portions of the route that provide covert
movement.

The compartmented geography and inherent
mobility restrictions of mountainous terrain pose
significant risk for reconnaissance in force opera-
tions. Since the terrain normally allows enemy
units to defend along a much broader front with
fewer forces, a reconnaissance in force may be

mountainous terrain makes ground reconnaissance
time consuming and dangerous, a combination of
ground and aerial or overhead platforms should be
used for engineer reconnaissance. Data on the ter-
rain, vegetation, and soil composition, combined
with aerial photographs and multispectral imag-
ery, enable engineer terrain intelligence teams to
provide detailed information that may be unavail-
able from other sources.

## Chemical, Biological, Radiological, Nuclear, And High-Yield Explosives Reconnaissance

conducted as a series of smaller attacks to deter-
mine the enemy situation at selected points. Com-
manders and their staffs should carefully consider
mobility restrictions that may affect plans for
withdrawal or exploitation. They should also
position small reconnaissance elements or em-
ploy surveillance systems throughout the threat
area of operations to gauge the enemy's reaction
to friendly reconnaissance in force operations and
alert the force to possible enemy counterattacks.
In the mountains, the risk of having at least a por-
tion of the force cut off and isolated is extremely
high. Mobile reserves and preplanned fires must
be available to reduce the risk, decrease the vul-
nerability of the force, and exploit any success as
it develops.

## Engineer Reconnaissance

The mountainous environment presents unique
challenges when conducting CBRNE [chemical,
biological, radiological, nuclear, and high-yield
explosives] reconnaissance. See MCWP 3-37.4,
Multi-Service Tactics, Techniques, and Proce-
dures for Chemical, Biological, Radiological,
and Nuclear Reconnaissance and Surveillance,
and MCRP 4-11.1F, Multiservice Tactics, Tech-
niques, and Procedures for Health Service Sup-
port in a Chemical, Biological, Radiological, and
Nuclear Environment, for information that can be
useful in conducting such reconnaissance.

Engineer reconnaissance assumes greater signifi-
cance in a mountainous environment to ensure
that supporting engineers are properly task-orga-
nized and have specialized equipment to quickly
overcome natural and reinforcing obstacles. En-
gineer reconnaissance teams conduct the follow-
ing functions:

## Air And Overhead Reconnaissance

 Assessing the resources required for clearing
obstacles on precipitous slopes.
 Constructing crossing sites at fast-moving
streams and rivers.
 Improving and repairing roads, erecting fortifications, and establishing barriers during the conduct of defensive operations.
 Integrating themselves into all mountain reconnaissance operations, since the restrictive terrain promotes the widespread employment of point obstacles.

Additional information on engineer reconnais-
sance can be found in MCWP 3-17.4, Engineer
Reconnaissance. In some regions, maps may be
unsuitable for tactical planning due to inaccura-
cies, limited detail, and inadequate coverage. In
these areas, engineer reconnaissance should pre-
cede, but not delay, operations. Because rugged

During all but the most adverse weather condi-
tions, air or overhead reconnaissance may be the
best means to gather information and cover large
areas that are difficult for ground units to traverse
or observe. Airborne standoff intelligence-collec-
tion devices, such as side-looking radar, provide
excellent terrain and target isolation imagery. Mis-
sions must be planned to ensure that critical areas
are not masked by terrain or other environmental
conditions. Additionally, air or overhead photo-
graphs may compensate for inadequate maps and
provide the level of detail needed to plan opera-
tions. Infrared imagery and camouflage detection
film can be used to determine precise locations of
enemy positions, even at night. Furthermore, heli-
copters, such as the AH-64 and OH-58D, can pro-
vide commanders and their staffs with critical day
or night video reconnaissance using television or
forward-looking infrared.

operations, a balance must be struck between the
adversary's location and communications capa-
bilities and that of the SIGINT collection team.
Effective and accurate IPB is critical to ensuring
optimal SIGINT collection. For more elaboration
on SIGINT impacts, see MCWP 2-2.

The UAS flight patterns may be adversely affected
by mountainous terrain. Line of sight (LOS) com-
mand links may limit UASs from flying into val-
leys, which also limits signals collection or electro-
optical resolution. They may require much higher
operating elevations to maintain positive command
and control, use satellite-based command links, or
operate in autonomous mode more often.

## Human Intelligence

Terrain and weather will slow the mobility of all
personnel on the ground, including human intelli-
gence (HUMINT) collectors. Also, disparate pop-
ulations and their sometimes long-term isolation
may result in language barriers. A limited supply
of interpreters and linguists will likely limit the
HUMINT collection efforts; moreover, in many
areas of the world, different groups of mountain
inhabitants speak languages or dialects different
from the rest of the country and even the rest of
the area. This variety of languages and dialects,
coupled with a likely distrust of outsiders can
make HUMINT collection extremely challenging.

Radar shadowing is a phenomenon in which a
distortion occurs in a radar return image when the
angle of an observed object, such as a mountain
side, is steeper than the sensor depression angle.
This occurrence may cause ghost images or dis-
torted images in mountainous terrain. Command-
ers and intelligence officers should consider
employing manned or unmanned systems that
employ nonradar sensors to minimize such
images. Overhead systems that employ electro-
optical or infrared sensors may realize greater
success than radar systems when weather condi-
tions facilitate their use. The subsequent employ-
ment of ISR assets to verify data provided by
overhead sensors helps ensure that the com-
mander does not fall victim to deception targeted
against specific overhead sensors.

## Signals Intelligence

Ground reconnaissance assets will be a key
source to enable HUMINT operations. Any infor-
mation or activity that ground reconnaissance
units observe must be reported up through the
chain of command. Only trained and certified
HUMINT collectors are authorized to collect
information. Frequent periods of low visibility,
severe weather, and compartmented terrain will
impact the range and observation capabilities of
these assets. See FM 2-22.3, Human Intelligence
Collector Operations, for further details.

## Geospatial Intelligence

Weather and terrain also limit the collection of
imagery. Terrain masking will preclude imagery
collection from national collection assets at some
angles. Precipitation, icing, and winds will limit/
preclude the employment of UASs and manned
reconnaissance aircraft. Such operations may
also be impacted by rapidly changing weather.
Long-endurance UAS operations will require
careful planning for dramatic changes in weather
over the course of a mission. Additionally,

Weather and compartmented terrain reduces the
effectiveness of signals intelligence (SIGINT)
assets, but mountainous terrain presents a special
challenge to SIGINT collection. Mountain min-
eral deposits can create dead zones for frequency
modulation communications, making the use of
SIGINT collection pointless. Extreme changes in
elevation create radio frequency blind spots,
known as terrain masking. This terrain masking
of radio frequency signals will, in many
instances, become the determining factor for the
employment and placement of SIGINT collec-
tion assets. Higher elevations provide better area
coverage for radio frequency signals; however,
weather conditions rapidly deteriorate as eleva-
tion increases, limiting effective deployment of
SIGINT collection teams to higher ground. In
order to maintain effective SIGINT collection

mountainous regions often experience extremely
high wind velocities. Smaller UAS platforms
may be unable to fly or may be lost due to vio-
lent winds experienced at higher altitudes. Fog,
cloud cover, and precipitation also limit the
effectiveness of electro-optical and infrared sen-
sors and degrade the quality of imagery col-
lected. Careful calculation of weather and terrain
effects and a focused and efficient collection plan
help to mitigate these limitations.

Geospatial information and services consider-
ations can be found in MCWP 2-26, Geospatial
Information and Intelligence. Such consider-
ations are useful for examining unique natural
aspects of the terrain that affect all types of oper-
ations in a mountainous environment. For exam-
ple, geospatial information and services can
model rock types and analyze the amount of
water a given rock type can provide, which will
impact sustainment and stability operations.
However, commands that direct a thorough engi-
neer reconnaissance/engineer battlefield assess-
ment will significantly increase the fidelity of
information available within GIS media.

## Ground/Long-Range Surveillance

In the mountains, surveillance of vulnerable
flanks and gaps between units is accomplished
primarily through well-positioned observation
posts. These observation posts are normally
inserted by helicopter and manned by small
elements equipped with sensors, enhanced
electro-optical devices, and appropriate com-
munications. Commanders and their staffs must
develop adequate plans that address not only
their insertion, but also their sustainment and
ultimate extraction. The considerations of
METT-T may dictate that commanders provide
more personnel and assets than they would to
operations in other types of terrain to adequately
conduct surveillance missions. Commanders and
their staffs must also ensure that surveillance
operations are fully integrated with recon-
naissance efforts in order to provide adequate
coverage of the area of operations.

Long-range surveillance units and snipers trained
in mountain operations also contribute to surveil-
lance missions and benefit from the restrictive
terrain and excellent LOS. Overhead platforms
and attack reconnaissance helicopters may also
be used for surveillance missions of limited dura-
tion (see MCWP 3-26, Air Reconnaissance);
however, weather may impede air operations,
decrease visibility for both air and ground ele-
ments, and reduce the ability of ground surveil-
lance elements to remain hidden for prolonged
periods without adequate logistical support. Ter-
rain may mask overhead surveillance platforms.

## Mountain Pickets

The Marine Corps has historically used mountain
pickets in mountainous environments. Mountain
pickets are usually dismounted, but may consist
of either mounted or dismounted elements.
Mounted maneuver elements should use scouts as
forward reconnaissance elements. These elements
should be small, light, mobile units that conduct
route reconnaissance for the main body. In addi-
tion to a route reconnaissance, these elements
should establish security at danger areas by secur-
ing the high ground and establishing mountain
pickets. The use of pickets will decrease the
speed at which a unit can move due to the diffi-
culty of moving along the top of ridgelines. Char-
acteristics of mountain pickets are to

 Provide flank security for the main body.  Provide surveillance of adjacent compartments.  Provide observed fires into and across adjacent compartments.
 Serve as a relay for voice communications.  Serve as connecting files in offensive operations.  Be either static or mobile along tops of ridgelines.
 Patrol for periods of 3 to 14 days.  Be acclimatized and in a high state of physical
fitness and have any specialized equipment needed to move across the specific ridge complex, such as crampons, ice axes, and ropes.

## Chapter 4 Maneuver And Movement

Maneuver in mountainous terrain is inherently difficult. The complex and compartmentalized terrain, time of year, weather, and adversary influence maneuver/movement and maneuver in the mountains. Detailed planning, specialized equipment and training, and strong leadership are required for successful operations. Low temperatures, reduced visibility, snow and ice, avalanche hazards, rock fall hazards, and an adversary who is familiar with fighting in the mountains all combine to make the mountains one of the most challenging environments for military operations. Further maneuver considerations that are unique to the different types of operations can be found in chapter 3.

## Air Movement

Aviation is well suited for conducting operations in a mountainous environment. Assault support aircraft are essential to rapid movement of forces and equipment in the mountains; however, commanders must be continuously mindful of the effects of weather and elevation on the employment of assault support aircraft. Assault support aircraft can provide the commander with tremendous maneuver capabilities, enabling him/her to concentrate combat power quickly and decisively. However, any operation that depends primarily on continuous aviation support to succeed is extremely risky. High elevations and rapidly changing weather, common to mountainous regions, are restrictive to aviation operations and make availability of aviation support unpredictable. Higher altitudes restrict helicopter lift capabilities and decrease aircraft payloads. Commanders must be familiar with the conditions that limit the effectiveness of aviation during mountain operations. A more detailed discussion can be found in chapter 7.

## Mounted Movement

Mechanized and motorized operations in complex and compartmentalized terrain are severely hampered by terrain, infrastructure, and weather. Narrow roads and movement corridors will limit vehicle traffic to predictable patterns. While simplifying traffic control, maneuvering and recovering vehicles will be problematic. Terrain and weather may limit the type of vehicles that can travel on certain roads, especially during inclement weather conditions. Roads that are wide enough for high mobility multi-purpose wheeled vehicle (HMMWVs) may not support larger wheeled vehicles (e.g., MRAP [mine resistant ambush protected]) or mechanized vehicles (e.g., tanks, armored personnel carriers, or amphibious assault vehicles). Where practicable, movement planners should ensure turnaround points are constructed in support of ground LOCs. Fuel consumption for vehicles also increases due to the effects of road slope/grade. Precipitation (snow and rain) will hamper the mobility of both mechanized and motorized assets. For example, roads close to rivers can flood during spring when snowpacks start to melt at higher elevations. The seasonal impact on vehicle movement must always be considered when planning convoys in complex terrain. Generally, mountainous terrain above the valley floor will severely limit movement of wheeled vehicles and is too restricted for tracked vehicles. Trafficable terrain, such as roads and trails, tend to contour along rugged terrain features, which makes mounted movement vulnerable to ambushes and attack aircraft. Recovery vehicles must always accompany mounted forces in mountainous terrain to rapidly remove disabled vehicles from the limited and narrow road networks. See chapter 6 for vehicle recovery information. Tanks and other armored vehicles, such as infantry fighting vehicles, are generally limited to movement in valleys and existing trail networks at lower elevations. Even at lower elevations, roads and trails may require extensive engineer work to allow tracked vehicle usage. In mountain operations, there is an operational need for an uparmored, over-the-snow vehicle similar to the small unit support vehicle (SUSV). Due to terrain limitations, tracked vehicles will rarely accompany dismounted infantry in the assault. Tanks, infantry fighting vehicles, and cavalry fighting vehicles can assist forces conducting dismounted movement by occupying support by fire positions and by using their firepower to isolate objectives. If employed above Level I terrain, mechanized vehicles can decentralize and operate as smaller units, but they should always be complemented by dismounted forces. Mechanized vehicles are more vulnerable in mountainous terrain because they are susceptible to attack from higher elevations and unable to elevate their weapon systems sufficiently to return fire. The lower atmospheric pressure at higher elevations considerably increases the evaporation of water in batteries and vehicle cooling systems and impairs cylinder breathing. Consequently, vehicles expend more fuel and lubricant and experience engine power reductions by 4 to 6 percent for every 1,000-meter increase in elevation above sea level. As a result, mileage and load carrying capacity is reduced during operations. Consequently, the need for fuel and oil increases approximately 30 to 40 percent. Additional movement considerations are discussed in MCRP 3-35.1D.

## Driving

Inexperienced drivers should not be permitted to drive in mountainous environments until they have had adequate training. Rollover battle drills must be rehearsed as roads tend to have very steep dropoffs. During predeployment training, drivers should conduct rough terrain driving to prepare them for the rigors of driving in complex, compartmentalized terrain. Drivers must become skilled at driving in reverse on narrow mountain passes: if the road only allows for one way traffic and drivers encounter oncoming traffic, then one of the parties will have to back up to a spot that will allow passage.

## Convoy Planning

To facilitate convoy planning, planners should conduct a physical network analysis. The physical network analysis should encompass roads, bridges, obstacles, population centers, and potential danger areas. Due to the complex nature of mountainous terrain, assets other than maps and dated imagery should be used. Roads that appear viable on maps may be impassable during certain times of the year. Additional convoy planning considerations include

 Type and maximum number of vehicles that
the road network can support, including each route's throughput.
 Requirement for new road construction or road
improvements.
 Classification of bridges.  Likely locations for vehicle rollovers.  Rapid analysis of existing roads for bottlenecks, deployment areas, passing places, and turnarounds for various vehicles. There is a requirement for early location and marking of bottlenecks, deployment areas, passing places, and turnarounds for various types of transport. Alternative routes must be identified and allocated as soon as possible.
 Selection, whenever possible, of at least two
routes; one for vehicle traffic and the other for troops on foot, animal transport, and refugees. If possible, additional separate routes for wheeled and tracked vehicles should also be allocated, particularly if the latter are likely to damage the surface.

## Mines And Improvised Explosive Devices

 Classification of routes as one- or two-way and
development of schedules for the use of oneway routes.
 Placement of signs, if the tactical situation permits, for both day and night moves on difficult and dangerous routes.
 Good communications, especially between
start and finish points, on congested portions of the route and at any passing points.
 Dedicated organization to rapidly clear obstacles caused by enemy action, the elements, or broken-down vehicles.
 Plans for integrated route clearance operations
to be executed prior to convoy movement along designated routes.
Limited ingress and egress routes in mountain valleys and villages aid in the enemy's ability to ambush and attack mounted convoys. The complexity of the terrain surrounding navigable roads coupled with the ability of the enemy to use this terrain to employ mines or improvised explosive devices (IEDs) can have a devastating effect on ground forces. When conducting convoy and route clearance operations, a detailed assessment of the road, terrain, and enemy threat must take place to determine potential mine/IED locations. Likely locations of mines/IEDs include chokepoints, compartmented terrain, and restricted roads. Using host-nation route clearance units is recommended, if available. Additionally, commanders can mitigate enemy obstacle emplacement (reseeding mines) by providing overwatch (pickets) to the MSR/alternate supply route or critical ground LOCs areas, such as bridges or tunnels. More information pertaining to route clearance and obstacle reduction is found in MCWP 3-17.8, Combined Arms Mobility Operations, and MCRP 3-17.2D, Explosive Hazards Operations.

## Dismounted Movement

Dismounted movement is often extremely slow and arduous and may require highly skilled mountaineering teams to secure the advance. For example, movement in Level II terrain may dictate that elements secure the high ground in Level III terrain. As with any type of movement, Most mountainous areas of the world have unimproved roads that are not suitable for heavy tactical vehicles. In such areas, existing roads and trails are few and primitive and cross-country movement is particularly challenging. Highways usually run along features that have steep slopes on either side, making them vulnerable to attack. Rivers may become major obstacles because of rapid currents, broken banks, rocky bottoms, and the lack of bridges. Landslides and avalanches, natural as well as manmade, may also pose serious obstacles to vehicle movement. In late winter or early spring, mud becomes a big issue and roads can become flooded as snow begins to melt. The runoff from melting snows in the spring and torrential rains in the summer or fall can wash away roads and flood low ground. In the face of numerous dangers, all vehicles must have survival equipment for all personnel.

## Operation Enduring Freedom: Vehicle Mobility In Nuristan

During Operation Enduring Freedom (OEF), a Marine Corps task force operated in the Nuristan and Konar regions of Afghanistan at an average altitude of 2,438 meters (8,000 feet). More than 75 percent of the MSR in the area of operations were unimproved surfaces that were impassable to tactical vehicles larger than a HMMWV. Additionally, not all MSR and secondary roads extended into all the mountains or valleys where the forces were operating.

her shortened gait, allowing the unit to maintain a uniform march rate.

proper movement techniques and formations and constant security to avoid unplanned enemy contact are some of the keys to successful dismounted movement.

## Route Planning

A tool available to commanders during the planning process is the time-distance formula, which assumes acclimatized forces. The following considerations will help planners determine time requirements for movements:

 Altitude at which forces will be operating.
The terms broken and unbroken trail have specific meanings. When moving through undisturbed (unbroken) snow greater than 30 centimeters (12 inches), the lead 2 or 3 persons have to pack the snow for the rest of the file. Once accomplished, the trail becomes broken. Since the lead persons exert more effort while breaking the trail, they need to be cycled to the rear of the formation every 15 to 30 minutes. Personnel complete this cycling in much the same way they execute a last Marine up run. Leaders replace personnel in the lead every 15 to 30 minutes, de-pending on fitness level.

 Amount of time a unit has had to acclimate to
the environment.
 Weight each individual will be required to carry.  Fitness level of the unit.
Foot marches in the mountains are measured in time and elevation, rather than just distance. For a map reconnaissance, map distance plus one-third is a good estimate of actual ground distance to be covered. One hour is planned for each three kilometers (about two miles) of distance. An additional hour is added for each 300 meters (1,000 feet) of ascent or each 600 meters (2,000 feet) of descent. The shortest Marine in the unit needs to be placed in the front of the formation due to his/
If dismounted, troops deploy into column (wedge) formation outside the file formation and the unit will move more slowly. With no one breaking the trail, all personnel must now move through undisturbed snow. In temperate regions, column formation is ideal since it maximizes fields of fire and allows for greater command and control; however, when operating in a snow-covered environment, the ideal formation is the file formation. Leaders only deploy into column formation if enemy contact is imminent because the rate of movement is so constrained. Table 4-1 shows dismounted movement rates of march in the mountains.

Movement Mode
Unbroken Trail
Broken Trail
On foot, no ski or snowshoe Less than 1 foot of snow
1.5 to 3 kph
2 to 3 kph
On foot, no ski or snowshoe More than 1 foot of snow
0.5 to 1 kph
2 to 3 kph
Snowshoe
1.5 to 3 kph
3 to 4 kph
Skiing
1.5 to 5 kph
5 to 6 kph
Skijoring
NA
8 to 24 kph (for safety, 15 kph is the highest recommended speed)
Legend kph
kilometers per hour
NA
not applicable

Time-distance formula: Add 1 hour for every 300 meters (1,000 feet) of ascent and 1 hour for every 600 meters (2,000 feet) of descent.

considered. First class lightweight assault packs, however, are vital. Leaders at all levels must ensure they review and modify existing unit packing lists and standing operating procedures when conducting dismounted operations in mountainous terrain. Consider using the memory aid DROP

 Decide mobility levels.
Commanders cannot permit straggling or deviations from the selected route. Every aspect of march discipline must be rigorously enforced to keep a column closed. To prevent an accordion effect, unit members must allow enough distance between themselves to climb without causing the following individual to change pace. In mountainous terrain, a slow, steady pace is preferred to more rapid movement with frequent halts.

 Reduce unnecessary equipment.  Organize resupply methods.  Police the ranks and conduct inspections.

## Terrain Analysis

Unlike flat terrain on which the quickest way from point A to point B may be a straight line, moving in a straight line on mountainous terrain is often more difficult and time consuming. Considerations for route planning include
Commanders must incorporate scheduled rest halts into movement plans based on distance and availability of covered and concealed positions. As a general rule, units should stop and rest for 5 minutes after 25 minutes moving. If possible, commanders should not conduct rest halts during steep ascents or descents. At the start of a march, everyone should dress lightly so that they begin the march cool. A short halt should be taken to adjust clothing and equipment after the first 15 minutes of movement.

 Physical network analysis.  Contouring to prevent forces from gaining or
losing elevation unnecessarily.
 Obstacles, such as population centers, rivers,
and bridges.

## Mountain Streams And Fords

In glacial areas, the principal dangers and obstacles to movement are crevasses and snow and ice avalanches. Exposure to the hazards of glaciated mountains increases at the company-level and above; hence, movement should be limited to separate platoons and lower levels. When moving on glaciers, an advance element should be used. The advance element identifies the best routes of advance, marks the trail, and provides directions and distances for follow-on units. A marked trail is especially important during inclement weather and low visibility and provides a route for retrograde. Commanders must carefully weigh the advantages of a marked route against the possibility of ambush and the loss of surprise.

## Individual Loads

Economizing the individual combat load is essential for conducting dismounted operations in the mountains. In steep terrain at elevations above 1,524 meters (5,000 feet), individual loads may need to be reduced by 50 percent. For example, water purification and the amount of bulky ammunition, such as pyrotechnics, must be Stream and river crossing operations are difficult and are usually accomplished by expedient means. Bridging operations in mountainous terrain are normally limited to spanning short gaps and reinforcing existing bridges by using prefabricated materials and fixed spans from floating bridge equipment. However, standard design or improvised suspension bridges may still be needed for longer spans. Because existing bridges may have low vehicle load classifications, standard fixed tactical bridges and bridging materials should be on hand to quickly reinforce or replace them. In extremely rough terrain, cableways and tramways may be constructed to move light loads and personnel across gorges and up and down steep slopes.

## Swift Water

Operations conducted in mountainous terrain may often require crossing swift flowing rivers or streams. Such crossings should not be taken lightly. The force of the flowing water may be extremely great and is most often underestimated. All rivers and streams are obstacles to movement. They should be treated as danger areas and avoided, if possible. Not all mountain rivers or streams will be fordable. If a water obstacle is too wide, swift, or deep, then an alternate route should be used or the crossing will require major bridging by engineers. It may require the use of rafts or boats. Reconnaissance of questionable crossing sites is essential. Map, photo, and air reconnaissance of the route may not always reveal where water obstacles exist. In a swamp, for example, unfordable sloughs may not show on the map and they may be concealed from aerial observation by a canopy of vegetation. Whenever a unit may cross a water obstacle, its commander must plan some type of crossing capability.

## Fords

A ford is a location in a water barrier where the current, bottom, and approaches allow personnel, vehicles, and other equipment to cross and remain in contact with the bottom during crossing. Fords are classified according to their crossing potential (or trafficability) for pedestrians or vehicles. Fordable depths for vehicular traffic can be increased by suitable waterproofing and adding deep-water fording kits. These kits permit fording depths up to an average of 4.3 meters (14 feet). Vehicle technical manuals provide further fording information. Reconnaissance of potential fording sites is critical and should include the soil composition of the approaches and the current's speed. Approaches may be paved or covered with mat or trackway, but they are usually unimproved. The composition and the slope of the approaches to a ford should be carefully noted to determine the trafficability after fording vehicles saturate the surface material of the approaches. The velocity of the water and the presence of debris are used to determine the effect, if any, on the ford's condition. Currents are categorized as

 Swift (more than 1.5 meters [5 feet] per second).  Moderate (1 to 1.5 meters [3 to 5 feet] per second).
 Slow (less than 1 meter [3 feet] per second).
The ford's stream-bottom composition largely determines its trafficability. It is important to determine whether the bottom is composed of sand, gravel, silt, clay, or rock and in what proportions. For more information see FM 3-34.170, Engineer Reconnaissance.

## Casualty Evacuation

Evacuation of casualties in the mountains is resource intensive in manpower, equipment, and time. Planned routes should identify casualty collection points that are accessible to multiple transportation assets, if possible. Units must consider how they will move casualties in the event that vehicles or aircraft will not be available due to terrain and weather restrictions. Personnel should be trained in rough terrain evacuation techniques prior to deployment, to include raising, lowering, and nonstandard casualty evacuation (CASEVAC) platforms. Leaders should plan and rehearse contingencies for mounted, dismounted, and aviation evacuations. Realistic time-distance analysis must be conducted to ensure proper allocation of assets and to maximize casualty survivability. Units should consider pushing medical assets to lower echelons to reduce CASEVAC requirements. Chapter 6 provides more information.

## General Considerations

Mountainous environments will limit mobility, the use of mutually supporting large forces, and the full use of sophisticated weapons and equipment. These limitations mitigate many of the strengths and develop innovative TTP in order to successfully accomplish the mission.

US military forces bring to the fight; however, they benefit the indigenous adversaries whose lesser sophistication better suits the environment.

The ability to move requires the proper integration and use of all appropriate resources, including aircraft, wheeled and tracked vehicles, watercraft, porters, pack animals, and individual means. Successful negotiation of the terrain and overcoming the effects of the environment will depend on specialized mountain training and proper equipment.

Mountain operations will restrict ground and air movement of units. Movement requires careful planning and execution with the understanding that distance over arduous terrain can be as difficult to overcome as the adversary. Marine forces must adapt their standing operating procedures

## Chapter 5 Engineering

responsibility for the different engineering elements based on subordinate command element mission-essential tasks within units can result in a separation of resources to support varying requirements with varying priorities. In order to maximize the allocation of engineering resources to the highest priority tasks and to prevent low productivity from any engineering element, commanders must be prepared to detach all horizontal construction engineering elements from subordinate commands and combine them to create a separate element.

## Joint Engineer Support Elements

As with all operations conducted in mountainous terrain, engineering operations require more preparation, resources, and time in the mountains than in any other environment. Steep elevation changes, extreme weather, unmoving rock, and lack of oxygen at high altitude all present challenges for the engineer that can only be overcome by proper planning. The other warfighting functionseffective communications, sustainment, fires, and maneuver with traditional methods that enable the engineer to accomplish his/her mission will also be hindered by the inherent difficulty of mountain operations. Marines should reference MCWP 3-17.7, *General Engineering*, for additional information regarding general engineering in all environments.

## Organization

The difficulties presented by the mountainous environment can only be effectively mitigated by the combined effort of all engineer elements in the area of operations. The Marine Corps has limited heavy engineering assets with which to accomplish complex large-scale engineering missions, making aggressive liaison with joint elements vital to the procurement of critical engineering capabilities and support that may be organic to the other Services.

## Naval Construction Force

Only through an in-depth IPB, a thorough ISR plan, and an in-depth analysis can units overcome the difficulties associated with mountain operations; moreover, Marine Corps engineers execute a thorough engineer battlefield assessment. There is no formula for success in the mountains, as every valley over the next ridgeline will present new challenges that will require new solutions. But through analysis, effective task organization, and the proper allocation of resources, Marine Corps engineers can adapt to those challenges.

## Task Organization

Joint Publication (JP) 3-34, Joint Engineer Operations, describes the basis for naval construction force (NCF) support to the operational forces (MCWP 4-11.5, Seabee Operations in the MAGTF). In addition to or coincident with component missions specified by the commander, the Navy provides general engineering support to MAGTFs. This support consists of NCF units under the operational control of a MAGTF. These NCF units are necessary to reinforce and augment the MAGTF's limited engineering capability. They are integral to the organization of the MAGTF and ensure immediate and effective delivery of CSS tasks.

Mobility in the mountainous environment is extremely limited, requiring extensive shaping operations. The sheer quantity of earth movement and horizontal construction hours involved in providing mobility in offensive operations requires a focused effort from all engineering elements. The inherent separation of areas of

## Rapid Engineer Deployable Heavy Operational Repair Squadron Engineer

The rapid engineer deployable heavy operational repair squadron engineer (known as RED HORSE) is a US Air Force unit with the mission of assessing, planning, and establishing contingency facilities/infrastructure to support contingency operations and combat missions. In short, RED HORSE constructs facilities and infrastructure to support Air Force operations.

## Prime Base Engineer Emergency Force

The mission of prime base engineer emergency force (known as Prime BEEF) is to provide civil engineer support for the beddown of personnel and aircraft. In other words, Prime BEEF provides utilities and civil engineer support to improve and maintain existing infrastructure to support air and space expeditionary task force operations.

## Mobility

During mountain operations where limited mobility exists, it is critical that units maintain security and control of available road/transportation networks, including securing key bridges, fords, crossing sites, intersections, and other vulnerable chokepoints. These locations must be protected against enemy air, obstacle, and ground threats; however, commanders must carefully balance their available combat power between protecting their freedom of mobility and allocating forces to critical close combat operations. Effective risk analysis and decisions are essential. Route clearance operations, patrols, traffic control points, and other security operations aid commanders in securing routes. During offensive operations, commanders may need to commit forces to seize key terrain and routes that afford their forces greater mobility and tactical options against the enemy. Engineer support in front of convoys and combat formations is often necessary to clear and reduce obstacles, such as washouts, craters, mines, landslides, avalanches, and snow and ice in colder mountainous regions. Reducing obstacles is more difficult in mountainous areas because of reduced maneuver space, lack of heavy equipment, and an increased competition for engineer support. Minefields should normally be breached, since bypassing properly sited obstacles is often impossible.

## Gap Crossing

Stream and river crossing operations are difficult and often must be accomplished by expedient means. Bridging operations in mountainous terrain are normally limited to spanning short gaps and reinforcing existing bridges by using prefabricated materials and fixed spans from floating bridge equipment. Nonstandard bridging techniques may be necessary, as well as fording techniques where possible. During the spring and early summer months, snow melt will cause previously passable gap crossings to become untenable. Alternate routes must be identified to ensure mobility.

## Limited Assembly/Construction Area

Due to the narrow road systems and the limited radius of curves typically found in mountainous environments, possible locations for gap crossing are severely limited and crossing locations may be located further from the objective. Setting up staging areas, equipment parks, and assembly areas may not be possible near the gap crossing location due to limited open space in the vicinity of the gap. These factors will influence both the employment of the medium girder bridge and the improved ribbon bridge. Properly conducted engineer reconnaissance/IPBs will effectively identify the best locations for gap crossings.

## Dry Gaps

Areas that have been identified as dry gaps during the initial engineer reconnaissance may become wet gaps overnight. The same could happen with wet gaps becoming dry gaps in the summer. Using available intelligence and geospatial and historic MET methods, engineers must identify historical high water marks during the reconnaissance in order to predict the potential rise in water level during the wet seasons.

## Nonstandard Bridging

Countermine tasks in this environment are also affected by the temperature. Marines should refer to MCRP 3-35.1D for further information. Mines placed in snow cover can be plowed away to clear a route. Detonation and breaching can be more difficult due to freezing temperatures, frozen ground, and concealment of the snow cover (see FM 5-102, *Countermobility*).

The mountainous terrain will often hinder the employment of standard Marine Corps bridging assets, so engineer elements must be prepared to use nonstandard bridging techniques, such as rope, cable, or suspension bridges, to ensure mobility to both mounted and dismounted maneuver forces.

## Snow-Laid Mines Ice Crossing

During cold weather operations, frozen waterways, such as lakes, streams, or rivers, can be used by friendly forces for mounted or dismounted movement depending on the thickness and condition of the ice. See MCRP 3-35.1D for more information.

## Counter-Improvised Explosive Device/Mine Operations

Enemy forces can easily emplace antipersonnel and antivehicular mines and IEDs in snowy terrain. However, if the mines become covered by a couple feet of snow and the snowpack hardens, the mines will be ineffective until the snow melts. The existence of snowy or inclement weather conditions on routinely used pedestrian or vehicular route scan have a negative impact on the effectiveness of route clearance equipment. Leaders must ensure they leverage all doctrinal and technological TTP advantages to develop an effective route clearance strategy that assures mobility in all ground cover. This situation presents the possibility that routinely used paths or routes during the winter may contain mines underneath the snowpack. All snow-covered routes considered cleared during the winter must be cleared again once snow begins to melt.

In a mountainous environment, the terrain favors the enemy's use of mines and IEDs as standalone weapons and in the initiation of ambushes. In the mountains, using mechanical mine plows and rollers or other standard route clearance vehicles, such as the vehicle mounted mine detection system (Husky) and mine protected clearance vehicle (Buffalo), is frequently impossible due to the lack of roads and trails and the low classification of those that do exist.

## Route Sweep Formations

Commanders should employ mounted and dismounted counter-radio-controlled IED electronic warfare systems to the greatest extent possible to counter radio-controlled/detonated IEDs. When on foot patrol, breaching or bypassing mines and IEDs may be required. The use of robots or demolitions is often required and preferred. Commanders must exercise extreme caution when employing demolitions in the vicinity of snow- and rock-covered slopes because they can cause dangerous rockslides, avalanches, and secondary fragmentation. More information on breaching operations and required synchronization can be found in MCWP 3-17.8.

During fair weather mountain operations, tactical mobility teams may be task-organized and employed in front of convoys or combat formations to perform contiguous and/or combat route clearance operations as well as limited route repair and nonexplosive obstacle removal, such as rocks, snow, and downed trees. As opposed to formations in other terrain, route clearance formations in the mountains push the flanks up the hillside to fulfill the role of mountain pickets/ overwatch and to uncover potential radio-controlled IED trigger person. In many cases, flanks on one side of the formation may be removed if the slope drops off in a steep decline.

## Metal Detectors

Dismounted engineers with mine and/or metal detectors will remain a requirement on the current battlefield to perform dismounted sweeps in order to deny the enemy the intended effects of their use of mine and/or IED warfare. Commanders must understand the physical and psychological toll that performing dismounted sweep operations will take on Marines operating in a mountainous environment. Marines of all other military occupational specialties (MOSs) must be cross trained on the use of metal detectors as a force multiplier.

## Technological Considerations

Extreme cold weather, snow, and highly mineralized soils found in the mountains will have adverse effects on mine and metal detectors. Leaders must conduct pre-operational checks and testing in a secure area prior to deploying detection teams. Counter-IED technology, such as robotic platforms that use LOS remote control interfaces, must also receive pre-operational checks prior to deployment in adverse terrain and snowpacked conditions. Mine detection systems, whether vehicle mounted or handheld, that use ground-penetrating radar technology may be adversely affected by snow- and water-covered surfaces. The counter-radio-controlled IED electronic warfare systems that use LOS may be hindered by the effects of mountainous terrain and weather.

## Engineer Reconnaissance

In preparation for operations, the development of the engineer battlefield assessment, including IPB, mobility, and combined obstacles and ambush sites overlays, may be the most important task that the MAGTF can perform in the mountains. Accurate and detailed reports will provide all maneuver element commanders with the critical information necessary for proper operational planning. Engineer reconnaissance assumes greater significance in a mountainous environment in order to ensure supporting engineers are properly taskorganized with specialized equipment for quickly overcoming natural and reinforced obstacles. Engineer reconnaissance teams assess the resources required for clearing obstacles on precipitous slopes, constructing crossing sites at fastmoving streams and rivers, improving and repairing roads, erecting fortifications, and establishing barriers during the conduct of defensive operations. Since the restrictive terrain promotes the widespread employment of point obstacles, engineer elements should be integrated into all mountain reconnaissance operations. In some regions, maps may be unsuitable for tactical planning due to inaccuracies, limited detail, and inadequate coverage. In these areas, engineer reconnaissance should precede, but not delay, operations. Because rugged mountainous terrain makes ground reconnaissance time consuming and dangerous, a combination of ground and aerial or overhead platforms should be used for the engineer reconnaissance effort. Data on the terrain, vegetation, and soil composition, combined with aerial photographs and multispectral imagery, allow engineer terrain intelligence teams to provide detailed information that may be unavailable from other sources.

## Route Selection

Waterways, such as rivers and lakes, can be obstacles during the spring and summer months but can become trafficable and an asset during the winter months. Full use of all intelligence available through map, ground, and air reconnaissance is necessary for proper route selection. Route selection criteria will vary by season. Regardless of the season, the need for roads will not be eliminated by over-the-snow vehicles.

## Engineer Ground Reconnaissance

Engineer reconnaissance includes observation of soil, snow cover, vegetation, ground water, surface water, ice thickness, road surface conditions, and sources of local construction materials as well as the conditions of alternate routes. The purpose of this reconnaissance is to verify all information previously collected; check all possible routes for natural and manmade obstacles, such as avalanche debris, mines, and ice obstacles; and select the best site or route to accomplish the mission.

## Snow And Ice

As much data and information regarding snowfall and ice growth as possible should be collected in the area of operations. Both are equally important and can be used as an advantage or can become a disadvantage to friendly forces. As snow accumulates, it reduces the mobility of both Marines and machine. Heavy accumulation of snow can result in avalanches, so engineers must be aware of the slope angles and aspects that favor avalanches in their area of operations. This awareness enables the commander to use the following forces of nature to his/her advantage:

 Fresh water freezes at 32 F and salt water
freezes at 28 F.
 Ice is relatively strong and has a varying
degree of toughness and high bearing power.
 As temperatures drop, the strength increases
rapidly from the freezing point to about 0 F.
the degree to which obstacles restrict operations and at the ability of each force to exploit the tactical opportunities that exist when obstacles are employed. Manmade obstacles used with restrictive terrain and observed indirect fire are extremely effective in the mountains; however, their construction is very costly in terms of time, materiel, transportation assets, and labor. Commanders must know the location, extent, and strength of obstacles so that they can be incorporated into their scheme of maneuver. Commanders should allot more time for personnel to construct obstacles in cold weather due to the restriction of additional clothing and equipment. When developing barrier obstacle plans, they must consider what effect changes in weather will have on the plan. For example, if temperatures increase significantly, many areas that were solid ground may become untrafficable, such as rivers and lakes. Conversely, if temperatures fall, causing rivers and lakes to freeze, these areas may become new avenues of approach for the enemy. Consequently, these areas should be covered by a combination of observation and direct and indirect fire weapons, to include demolitions.

 From this temperature, the strength of ice
remains fairly constant despite lowering temperatures.
More information is available in MCRP 3-35.1D.

## Countermobility

During mountain operations where limited mobility exists, it is relatively easy to conduct countermobility.

## Obstacles

Obvious natural obstacles include deep defiles, cliffs, rivers, landslides, avalanches, crevices, and scree slopes, as well as the physical terrain of the mountains themselves. Obstacles vary in their effect on different forces. Commanders must evaluate the terrain from both the enemy and friendly force perspective. They must look specifically at The engineer should never fail to use the natural obstacles that the environment offers. Icy slopes and fallen trees can disrupt and channel troop movements. Leeward slopes with heavy deposits of snow can be rigged with explosives in order to catch enemy forces in the avalanche runout zone. Barbed wire and concertina are still effective on snow. It is easy to create effective obstructions in mountains by cratering roads, fully or partially destroying bridges, or inducing rockslides and avalanches. Units can emplace antitank minefields (family of scatterable mines) effectively to canalize the enemy, deny terrain, or support defensive positions. Commanders should remember that clearing or reducing these same obstacles may be extremely difficult and a hindrance to future operations. Using reserve and situational obstacles, lanes and gaps, and plans to rapidly reduce friendly obstacles must be an integral part of all defensive operations. Commanders must also consider the enemy's ability to create similar obstacles and minefields when developing courses of action that hinge on speed of movement or a particular avenue of approach.

## Mines

Personnel should refer to MCRP 3-35.1D for considerations regarding the employment of mines in cold weather.

## Avalanches

Avalanches occur in nature when snow loads exceed the strength of the snowpack structure. Artificial loads, such as explosive detonations, can be applied to the snowpack in order to artificially trigger an avalanche. Artificial avalanche triggers allow engineers to cause avalanches at a specific time when it is safe or most advantageous for friendly forces to hinder enemy force movement. The use of demolition charges or artillery air munitions is one method of applying stress to the snowpack's instability. Explosives do not provide the same loading of stress onto the snowpack as other control trigger mechanisms, but they may be ideal for some snowpack conditions. The range of terrain types as well as the operational requirements necessitates the use of various delivery methods to optimize the effectiveness of the explosives. The explosives delivery methods employed in a control area are chosen on the basis of the general terrain, snowpack, effectiveness, operational necessity and potential for noncombatant casualties, and destruction of civilian property and infrastructure. In order to mitigate the threat of avalanches and rockslides to friendly forces, noncombatants, and destruction of civilian property and infrastructure, the MAGTF has several methods to artificially trigger the event when it is safe. Engineers can place demolition charges on the snowpack or use indirect fire or direct fire with explosive projectiles to trigger the event. Indirect fire allows the MAGTF to control the time of the event from a safe distance without the burden of movement. They plan to trigger close enough to offensive operations that time is available to clear routes, yet not allow for the threat potential to rebuild. In stability operations, planners must mitigate the avalanche threat regularly for all LOCs. Small patrols in unfamiliar areas should carry mortar systems in order to mitigate any suspicious slopes that they might encounter from a safe distance.

## Survivability

The ability to dig survivability positions into a slope increases the amount of usable terrain, increases survivability of the positions, and saves on time and money for force protection. Engineer units should task-organize and deploy with the proper resources to cut into the hillsides so survivability positions can be placed into the mountain instead of building on top of them. Such operations will require extensive use of heavy equipment and demolitions.

## Elevation Of Forward Operating Bases/Combat Outposts In Relation To Surrounding Terrain

When planning to establish a fixed site, the position and angle of the enemy's fire plays a significant role in choosing the site location. Whoever maintains the high ground has an advantage of fire and cover, so defensive positions should be elevated. Placing fixed sites on peaks or ridges should be avoided because it makes the site vulnerable to fire from 360 degrees. Ideally, sites should be located on the military crest of the reverse slope with observation posts on both the military crest of the forward slope and surrounding key terrain. As time permits, positions should be camouflaged and/or concealed and dummy positions established.

## Overhead Cover

Mountains will almost always present the enemy with the opportunity to shoot at the friendly base from an elevated position, so most rounds will impact on the top of structures. Overhead cover should be heavily reinforced and maintained, requiring increased structural support in load bearing walls and roof supports.

## Forward Operating Base Site Selection Horizontal Construction

The most noticeable challenge in the mountains is the lack of road networks and railroads. Both are practically nonexistent, making road construction a major operation. Heavy equipment and combat engineer operators exposed to the elements rapidly become fatigued and require regular relief after short periods. Continuous operations, except for short, periodic stops for operator checks and minimum equipment maintenance, prevent equipment from freezing. Cross-country movement of units without engineer support is extremely difficult.

The trend for most bases is to locate them where it is convenient for logistics, command and control, and mobility, which is most likely next to a local MSR. In the mountains, MSRs tend to follow river valleys. Such routes present an issue when the river valley floods in the spring and washes out the entire MSR and parts of the local population center. Bases must be established high enough off the flood plain to avoid being damaged by the spring snow melt and should have a local MSR that is also clear from the flood plain.

## Snow Removal/Drainage Roads

The FOB construction in high altitude areas must be planned with space for snow removal. A location must be identified for storing snow piles and these locations must have adequate drainage to remove the snow melt from the FOB.

## General Engineering

For the most part, creating new road systems in mountainous regions is impractical because of the large amount of rock excavation required. Further, in winter months, rock excavation will be nearly impossible with the use of only heavy equipment. Therefore, roadwork is generally limited to the existing roads and trails, which often require extensive construction, improvement, maintenance, and repair to withstand the increased military traffic and severe weather conditions. In certain mountainous areas, materials may be difficult to obtain locally and it may be impossible to make full use of conventional heavy engineer equipment for road and bridge construction or repair. In such cases, large numbers of engineers are required and units must rely heavily on hand labor, light equipment, and demolitions.

## Secondary Roads

General engineering involves activities that identify, design, construct, lease, and provide facilities. Characterized by high standards of design, planning, and construction, general engineering in mountainous terrain must be carefully considered due to extreme temperatures, altitudes, and difficulty of terrain. If feasible, construction should be undertaken when little or no frost is on the ground; often, if the permafrost is too thick, it can make it impossible to dig. Construction operations in mountainous terrain are extremely slow, time consuming, and complicated by the lack of local material, heavy equipment operation difficulties, and enemy defensive activities. Due to the uneven terrain, surveyors must be employed to help ensure the best structural integrity of the construction project. Local materials, if available, should be used for construction purposes to help with stability operations and to help alleviate the strain on overburdened transportation and aviation assets.

Secondary roads and trails should be steadily improved to accommodate wheeled and tracked vehicles and, eventually, heavier vehicles. Their selection depends on necessity and the speed with which the routes can be put into service. Abnormal gradients on roads may be necessary to ensure that construction keeps pace with tactical operations. Side hill cuts are the rule and the same contour line is followed to avoid excessive fills or bridging. When terrain permits, turnouts should be constructed in order to mitigate traffic congestion on single-lane roads or trails. Drainage requirements must be considered in detail because of the effects of abnormally steep slopes, damaging thaws, and heavy rains.

## Landing Zones

Engineers must be prepared to consider LZs for aviation assets. Drainage is an important factor in selecting an airfield site and planning the construction. Engineers should be aware of the following features related to drainage in order to ensure a successful LZ design:

 Sites should be selected in areas where cuts or
the placement of base-course fills will not intercept or block obvious existing natural drainage ways.
 Areas with fine-textured, frost-susceptible soils
should be avoided.
 Soil stabilization and dust abatement must be
understood.
 An LZ should normally be on the windward
side of mountain ridges or peaks to ensure a reasonably smooth air flow; however, in forward areas, concealment from the enemy observation is a more important factor in selecting a site. These sites should be well clear of structures and vegetation, which are vulnerable to helicopter rotor downwash, particularly in confined spaces.
 An LZ should be as level as possible and may
not be on a slope exceeding 7 degrees in most
situations. Aircrews that experience difficulty landing due to extreme slope angles in LZs may request to reposition to a less drastic slope angle for operations. On slopes greater than 7 degrees, a helicopter cannot land; however, if rotors are clear of obstructions, they may be able to load and unload in a low hover.
 Snow-covered LZs can be effectively marked
with colored dye, timber "letters," or smoke, but they should be camouflaged with more snow when not in use.
In soft snow, a suitable reference point, such as a vehicle, should be available to the pilot to avoid disorientation in recirculating snow during descent. Stamping snow to form LZs is dangerous because compacted snow forms a crust when frozen, which the powerful downdraft of large helicopters breaks up causing a foreign object damage hazard. As with soft snow, some form of reference is desirable and, if time permits, the area should be damped with water or other dust abatement material. Helicopter-blown sand or ice is a hazard to Marines and weapons, particularly optics. Furthermore, downwash in freezing conditions can cause frostbite to exposed skin. An LZ should be relatively clear of fine dirt or sand, which often develops on spaces frequently trafficked by personnel and heavy vehicles. Fine, soft dirt can become deep on a relatively flat LZ and may cause brownout conditions for landing and departing aircraft. This situation may become even more dangerous with the addition of confined approach and departure paths due to surrounding steep terrain. When possible, LZs should have an adequate system in place to reduce the amount of dust prior to aircraft arriving. Crushed rock, matting pads, large amounts of water sprayed on the LZ, glue-/grease-based dust abatement products, and commercial products approved by aviation leadership are all viable methods of preventing pilot disorientation due to whiteout/brownout incidents.

## Vertical Construction

Field construction time and the difficulty of conventional engineer work are magnified in mountain operations. Environmental characteristics that complicate engineer tasks are permafrost, extreme and rapid changes in temperature, wind, moisture, snow, ice storms, and flooding. Although standard construction principles remain the same in mountainous environments, some considerations must be given to construction during times of heavy snowfall. The standard pitch of the roof (4:12 pitch [4 inches of rise over 12 inches of run]) is sufficient for snow to slide off; however, corrugated steel must be used atop plywood in order to allow the snow to slide off more freely. Ceilings need to be sealed in order to prevent dripping into structures.

blowtorch is used to preheat most air-cooled engines. Most liquid-cooled engines are equipped with a winterization kit that contains a preheater. The respective generator's technical manual for preheating and cold weather starting operating instructions is a good reference.

For wood frame construction, all material design requirements for structures without a snow load should be increased to the next standard material size. For example, a building with 2-inch by 4-inch studs without a snow load should be designed with 2-inch by 6-inch studs for use in an environment with a snow load. If material of a greater size is not available, on-center spacing for both studs and trusses can be decreased to accommodate the increased weight due to snow load.

## Utilities

Special care must be taken when emplacing and using field wiring harness kits. Typically, in extreme weather conditions, a lower American wire gauge is needed. If temperatures drop to below -32 F, a 12-gauge American wire will not be able to withstand the weather. Wires will become brittle and need to be covered with thermal protectors. At the same time, if wire is buried, it needs to be below the permafrost layer, which can be up to 3 feet (1 meter) in some areas, or the gauge needs to be low enough to be able to withstand the extreme temperatures.

Electrical and water equipment have associated winter kits. It is imperative that these winter kits are deployed with the gear in order to enable the gear to work under extremely cold conditions. Further considerations must be given to the altitude change for output of equipment. Also, when emplacing utility equipment, the operator must ensure that the equipment is on as level terrain as possible (not to exceed a 15 percent gradient) and the equipment is placed on any insulating material to keep it from freezing to the ground.

## Tactical Electrical

Generator sets are rated based on sea level altitude. The rating of the set may decrease as the altitude increases. Information about operating equipment at high altitudes is usually printed on the data plate. The kilowatt rating may be reduced at high altitudes, depending on the type of engine used to drive the generator. Refer to the appropriate technical manual for information for each model of generator set. As a general rule, a generator will lose 3.5 percent of its power for every 300 meters (1,000 feet) over 1,219 meters (4,000 feet) that it ascends. Cold weather maintenance must be done on all electrical systems. In all generators, the antifreeze solution must be able to protect the equipment at the lowest temperature expected. Also, the batteries will need to be fully charged to prevent freezing. In some cases, ice fog, which is caused by engine exhaust in very cold climates (-25 F and below), may occur. To eliminate ice fog, a tube should be placed on the exhaust pipes and covered with a tarpaulin to diffuse the exhaust in the snow. Lastly, prior to operating the equipment, ice, snow, moisture, and other foreign material should be removed from the generator set.

Generator sets can start and operate at temperatures as low as -25 F without a winterization kit. With a winterization kit, generators can operate at temperatures as low as -50 F and can be stored in temperatures no colder than -60 F. It is recommended that winterization kits be installed prior to deployment. Generators must be allowed to rise to normal operating temperature before applying a load to reduce the possibility of engine damage. When the ambient temperature is lower than -25 F, most engines require preheating before they are started. The engine type determines the method used. The two basic types of cooling systems used on power-generating equipment are air cooled and liquid cooled. A

## Potable Water

Major sources of water supply, in order of efficiency and economy, are
turbulent unfrozen sections of a river. If frazil ice is present at the water supply hole, the ice filter should be used to keep the frazil ice from being sucked into the raw water pump and freezing.

 Drawing water from under rivers or lakes.  Melting ice or snow.  Drilling wells.
More information on water usage requirements can be found in chapter 6.

Higher altitudes require adjustments in planning factors (see chap. 6). For example, the water treatment chemicals react differently at extremely low temperatures: at 32 F, chlorine requires twice as much contact time to properly disinfect water. It is recommended that individual Marines carry individual water purification systems and supplementary iodine tablets in order to purify water for personal consumption. Further information on potable water in cold weather and mountain water operations is found in MCRP 3-35.1D and FM 10-52, Water Supply in Theaters of Operations.

## Fuel

The Tactical Water Purification System can operate down to 32 F without the winter kit and down to -25 F with it; however, heated shelters are often necessary for operating water purification equipment in order to prevent the inner pipes from freezing when not purifying water. When temperatures go below 32 F, water purification personnel can have difficulty operating and maintaining their equipment. Constant winterizing and use of the water heaters are required to prevent freezing. Winterizing, however, is not always feasible. Surface water in winter must be pumped from beneath an ice layer. To prevent freezing, it may be necessary to preheat the water during operations and keep it heated until it is issued, which may require additional heaters. The water site selection can be tricky in mountainous terrain. The water site needs to be on high porous ground, reasonably level, and well drained to prevent water from impeding resupply operations. During the winter in cold regions, reconnaissance teams should use ice augers to determine ice thickness on a potential water source. The team should also measure the depth of water under the ice at several spots because of the variations in the beds of shallow streams and rivers in mountainous regions. Once a site has been selected, shaped charges are far superior to hand tools for cutting holes through thick ice to prepare a water hole.

Mountain operations challenge the storage and distribution of fuel. Cold weather operations require increased testing, recirculation, equipment maintenance, and fuel usage due to extended equipment operation requirements. Ground operations may increase fuel consumption rates of individual vehicles by 30 to 40 percent, requiring more fuel filtering and distribution. Depending on the temperature, adding icing inhibitors to fuel may be necessary. Diesel fuel will reach its freezing point and begin to gel at around 15 F; whereas, jet fuel has a much lower freezing point of around -51 F. Fuel additives are available to decrease the possibility of fuel gelling (Military Detail [MIL-DTL] Specification 85470, Inhibitor, Icing, Fuel System, High Flash, North Atlantic Treaty Organization Code Number S-1745). Although fuels do not completely freeze, they will be the same temperature as the air. To prevent frostbite, fuel handlers must always wear gloves designed for handling petroleum products when working with fuels.

## Heavy Equipment

Maintenance of the water distribution systems must be considered. In very cold weather, it may be necessary to periodically drain the raw water pump and the raw water hoses and bring them into a warm shelter so they do not freeze. Frazil ice is the slushy ice that forms as the water travels in Engineer equipment use in mountainous environments does not change drastically from its use in other regions; however, there are considerations that must be made when planning engineer equipment operations.

are increased when operating on uneven snowpacks, operators must be cautious of varying snowpack and snow stability.

## Hard Starting Excavation And Earthmoving

Diesel engines, found on all engineer equipment, will be prone to hard starting. Some are equipped with engine block heaters to help alleviate this problem. Commanders must plan on increased fuel consumption if vehicles are to remain running during extreme cold in order to counter cold sink.

## Tire Chains

Mountain soil conditions are prohibitive to excavation and earthmoving operations due to the amount of subsurface rock. During extreme cold weather conditions, excavation and earthmoving operations will be additionally hindered by the permafrost layer. If excavation and earthmoving operations are to take place, commanders must plan for increased time and equipment repair parts, especially cutting edges, cutting blades, and hydraulic systems.

When conducting heavy equipment operations in snow, tire chains will increase mobility and make material handling operations safer.

## Underground Construction And Confined Spaces Snow Removal

Mountains often present natural and manmade cave complexes that make convenient weapon caches and rally points. The dynamic nature of earth movement and the threats associated with confined spaces make underground areas extremely dangerous. As a result, they should be avoided unless absolutely necessary. Manmade caves and underground shafts should be avoided at all costs; if weapons or enemy forces are suspected of occupying manmade underground spaces, an attempt should be made to coerce the enemy to come out of them before using demolitions to destroy the cave portal. Units deploying to any terrain that supports underground spaces should equip their maneuver elements with gas detectors capable of identifying oxygen and carbon monoxide levels.

Front end loaders and road graders make excellent snow removal tools, but road edges, especially drainage ditches, should be marked to avoid accidents. When removing snow, operators must be cautious so as not to break through the soil permafrost layer to prevent muddy conditions. Bulldozers do not make good snow removal tools for FOB operations. The amount of mechanical damage to the ground surface generally outweighs the reduced time for removal. Commanders must weigh the use of bulldozers for snow removal outside of the FOB against the damage to road surfaces that can be caused. They must exercise extreme caution when ordering heavy equipment operations in deep snow or ice, since both tracked and wheeled vehicles are prone to sliding on ice. Since rollover conditions

## Chapter 6 Logistics And Sustainment General Planning Considerations

Planning considerations for logistics and sustainment begin with the concept of logistic support. Other considerations include crosstraining and interoperability, waste management, accountability, security, aviation support, and seasonal challenges.

## Logistic Support Concept

sonnel, such as winter mountain leaders, who have expertise in route planning and movement techniques. Logistic support elements may provide container delivery system (CDS) recovery, sling operations, helicopter LZ coordination, convoy escort, health services, motor transport, material handling, supply, maintenance, vehicle recovery, and field feeding. In addition to these multi-Service functions, the Marine Corps also requires their logistical elements to fulfill detainee operations, embarkation, and general engineering functions.

## Intermediate Staging Bases

Due to the increase in time associated with moving at high altitude, logistic support should be forward positioned as close to the supported unit as possible. The FOBs will likely be supported by intermediate support bases and main supply hubs. During OEF, for example, Jalalabad Airfield in Afghanistan was established so supplies could be positioned forward of the main supply hubs at Bagram Airfield and Kandahar Airfield.

## Logistic Support Elements

Operating farther back in intermediate staging bases (ISBs), logisticians will employ convoys and aerial drops to deliver critical and sensitive materials and supplies. Logistic organizations at an ISB should assume that key support personnel will be on duty 24 hours a day, 7 days a week. The following minimum tasks should be located at an ISB: Class I, III, V, and VIII commodity oversight; mortuary affairs; parachute rigging; sustainment electronic maintenance; and transportation movement coordination.

## Liaison Officers

Supported units should maintain an LNO at the logistic operations center. Additionally, Service LNOs should be maintained with the theater of In mountain operations, logistic units may need to be task-organized and attached to combat units in order to support widely-dispersed forces. Infantry battalions operating in mountainous areas may disperse into company- or platoon-sized elements that operate from FOBs and combat outposts (COPs). Each support element should include per-

## Distributed Operations In Operation Enduring Freedom

During OEF, many battalion, regiment, and brigade areas of operations were extraordinarily large. For example, while deployed to Regional Command East, the area of operations for 1st Battalion, 3d Marines was approximately the size of Maryland. The battalion dispersed into six, company-sized FOBs, which were separated by as much as a 4- to 6-hour drive. Squads and platoons conducted operations outside the FOBs for up to a week at a time. At times, resupply was sporadic, so each forward-based element required considerable self-sustainment, which was facilitated by logistic support teams assigned to each FOB.

operation support organizations and other higher level joint commands. They are needed when resupplying along ring routes to ensure supplies being distributed to units operating in the mountains are properly prioritized.

## Logistic Cross-Training

During mountain operations when units often operate outside of the range of immediate external support, personnel will likely need to be cross-trained in many functional areas, including logistics. The institution of combat lifesaver training for nonmedical personnel is one example of successful implementation of this concept. Potential areas for logistical skills cross-training include CASEVAC, utilities, maintenance, food service, and air delivery recovery. For example, in an environment where IED attacks are prevalent, vehicle recovery crews may need to be able to conduct firefighting, CASEVAC, search and recovery of human remains, and sanitization of blast sites and equipment. More information on mortuary affairs is available in FM 4-20.64, Mortuary Affairs Operations.

## Interoperability

Joint operations in mountainous terrain require interoperability among the Services. For example, when 1st Battalion, 3d Marines was deployed in the mountains of Afghanistan, all logistical support for the battalion (except Marine

## Supporting Marine Corps Embedded Training Teams In Operation Enduring Freedom

To logistically support Marine Corps embedded training teams (ETTs) in Afghanistan, United States Marine Corps Forces, Central Command (MARFORCENT) established a memorandum of agreement with the Army. The only supplies and equipment MARFORCENT provided to the ETTs were Marine Corps-specific Class II (clothing and individual equipment) and Class VII (major end items). Class II support often required phone calls to Kuwait, Bahrain, Tampa, and an ETT's home station. Class VII resupply, such as battle-damaged vehicle replacement, was handled by MARFORCENT in Kuwait, which worked the theater of operation transportation network to transport replacement items to Bagram Airfield. From Bagram Airfield, delivery waited until opportune lift on the ring route was available. Alternatively, ETTs would road-march items if a convoy was available. Host-nation trucks were employed at times, but the trucks lacked security and pilferage rates were high. By mid-2008, MARFORCENT had established a liaison team of six Marines at Bagram Airfield, headed by a field grade supply officer, to coordinate with the 101st and 82d Airborne Division staffs. This team supported seven ETTs (comprising 150 personnel) throughout Regional Command-East.

Corps-unique items) came from the Army. Units operating in the mountains may be required to rely on other Service, coalition, and/or hostnation support for extended periods. Support between adjacent units from different Services or country origin is frequently necessary during mountain operations. Logistics service providers should be prepared to affect cross-Servicing agreements to procure sustainment from adjacent units from different Services in order to mitigate periods of unreliable sustainment. The MAGTF must have a plan to coordinate multiple contingency contracting actions.

## Sustainment Challenges

Logistic planners must accept that time and distance will be at least doubled by the environment. In some areas, terrain is so restrictive that only air or foot movement is possible. Three kilometers (2 miles) on the map may actually require nearly 10 kilometers (6 miles) of foot movement due to the switchbacks of trails, high elevation, and weather. Taking shortcuts and unnecessary risks typically delays movement and compromises the safety of logistic efforts. When operating in remote mountainous areas, units must be prepared for extended periods without resupply. They may need to maintain two to three times the anticipated requirement for supplies or adopt innovative methods to overcome shortfalls. In mountain operations, units should plan for 10 to 20 percent loss of supplies for the following reasons:

 Damage often occurs during air delivery.  Host-nation trucks can easily get damaged while
traversing rough roads over long distances.
 Pack animals carrying supplies over treacherous mountain trails can easily be lost.
the local nationals. If not part of the planning process, waste management could rapidly become a serious problem. More information can be found in MCIP 4-11.01, Waste Management for Deployed Forces; MCWP 4-11.1, Health Service Support Operations; MCRP 4-11.8A, Marine Corps Field Feeding Program; and ATTP 4-02, Army Health System.

## Supplies And Equipment Accountability

 Due to less open space to store supplies, enemy
indirect fire often has a greater effect than it would if supplies were properly dispersed.
 Packaged supplies can easily break open or get
buried under snowstorms and avalanches.
 Pilferage is common.
In mountain operations, supplies and equipment accountability can be extremely difficult because equipment originates from numerous sources. Units and equipment spread out across multiple remote FOBs adds to the challenge. Supply personnel must be aware of unit movements, changeovers in unit leadership, and equipment transfer between FOBs. Units should follow current regulations and command policies and procedures for equipment accountability.

## Route Security

Units operating in mountainous terrain may need to rely on innovative and unorthodox methods of logistic support. For example, units might need to make use of captured enemy supplies and equipment. They might need to rely on locals who know the terrain or "piggyback" on a coalition partner's assets. Army and Marine maintenance personnel may be tasked to repair host nation military or civilian equipment. The use of hidden supply caches may need to be implemented.

## Waste Management

Considerations must also be made regarding waste management operations, including solid waste or trash, human waste, medical waste, food waste, and hazardous material disposal, and the impact it can have on the fitness of the mountain force and In mountain operations, the enemy will target logistic units and will seek to interdict resupply operations. Enemy units will infiltrate and seize key terrain that dominates supply routes in an effort to disrupt and isolate units from logistical support. In mountain operations, there is no rear area. Logistical units operating outside of friendly confines must maintain a combat-oriented mindset, such as vehicle-mounted resupply units that conduct combat patrols instead of convoy operations.

## Resupply In Operation Enduring Freedom For 2D Battalion, 3D Marines

The 2d Battalion, 3d Marines faced severe logistic challenges during OEF. In their area of operations in Afghanistan's northeastern mountains, resupply of basic supplies, vehicle maintenance, and medical evacuation were challenging. Helicopter support was limited due to the enemy's antiair capabilities and the severe relief, so helicopter resupply was usually infeasible. The primary methods of resupply were through CDS airdrops or through tactical or contracted civilian vehicles. For CDS airdrops, the request process and coordination with both the Army support cell at Bagram Airfield and Air Force planners involved a great deal of refinement and practice. Procedures for coordinating communications, signaling, and final clearance were detailed and strictly adhered to. Once supplies were on the ground, severe elevation changes and switchback mountain trails made the movement of supplies extremely challenging and usually required either a host-nation truck or pack mules. Additionally, when a CDS drop landed well off target, the supplies were sometimes looted by local villagers before the Marines could reach them. Often, the recovery of supplies required too much energy and resources to make retrieving them worth the effort.

A combination of patrolling and air reconnaissance is the best means for providing route security. Observation posts on dominant terrain along supply routes are also essential for early warning of enemy infiltration into rear areas. Checkpoints between bases should be established to increase route security and enable trucks to deliver supplies without interference from the enemy. Patrols must be continuously alert for ambush and they must be skilled at locating and identifying mines; moreover, immediate action drills must be emphasized in training. Route clearance must be conducted at irregular intervals to verify the status of roads and prevent enemy infiltration. For example, the route clearing process in OEF was, first, for a route clearance request to be submitted, and then for the combat logistic patrol to attempt to travel the route shortly after the route was cleared. Experience showed, however, that the route clearance package may not occur on a certain date and at a certain time. Finally, movement of supplies at night may reduce vulnerability to enemy attack, but night marches present other hazards due to the difficult terrain and require daylight reconnaissance, careful route preparations, and guides.

## Aviation Support

Wide variations in climate and frequent and sudden changes of weather will preclude continuous aviation support, especially during the winter when mountain passes are regularly impassable due to low ceilings and poor visibility. Rapid weather changes often do not allow for aircraft to reach casualties; therefore, alternative modes of evacuation must be planned in this environment. The reduced hours of daylight consistent with mountain arctic or subarctic winter operations may dictate a greater need for artificial lighting, or a greater reliance on night vision devices, as the tactical situation permits. The provision of the additional lighting must be planned for in the logistic concept of operations. For example, sufficient lighting equipment must be available to furnish adequate illumination for maintenance services.

Conversely, the extended daylight during summer requires important operational adjustments.

## Winterization

Equipment and facilities may need to be winterized in mountain operations. For example, heated buildings, shelters, or tents with wood flooring are required for maintenance in cold weather. Winterization can be a significant operation that requires extensive advance planning in preparing facilities and equipment. Material and equipment need to be ordered well in advance of the winterization date. Contracts may need to be negotiated with host-nation providers for facilities, generators, and other winterization-related items and services. Delays in delivery of long lead-time items, such as lumber, may require extending winterization target dates. Competing construction projects may stress engineer and logistical assets. These challenges highlight an important point: staff responsibilities must be synchronized so that winterization is viewed as a force-wide mission, not just a task for engineers.

## Supply

Logistics and sustainment require the consideration of several types of supplies. Chief among those are personal nourishment, protection, and equipment items.

## Food And Water (Class I)

Mountain operations, particularly in extremely cold weather, increase Class I item consumption and energy requirements by as much as 50 percent. The average person's caloric need may increase to 6,000 or more calories per day; despite the greater caloric requirement, high altitude reduces the appetite. If a reduced appetite is allowed to result in decreased consumption, the effect can reduce morale and fighting capabilities and make personnel more susceptible to mountain-related illnesses. For example, some personnel conducting dismounted operations during OEF lost 20 to 40 pounds during deployment and at least one was evacuated due to malnutrition and severe (60 pound) weight loss. Refer to appendix A for risks related to dehydration.

fluid beverage bases to increase consumption of water and easy-to-eat snacks. The FSR ration is meant to be used for three days or fewer at a time due to the limited menu and limited caloric content. To meet increased calorie needs while operating at high altitude, the FSR will need supplemental items, such as fruit, vegetables, and milk, or the addition of one MRE to increase calories and menu variety. When compared with three MREs, the one day FSR subsistence weighs 50 percent less and takes up half the space. The FSR is similar in weight to three meals, cold weather but does not require rehydration.

The standard meal, ready to eat (MRE) contains insufficient calories and nutrition for mountain operations; whereas, the meal, cold weather ration is more suitable for the environment, if sufficient water is available. If possible, fresh fruit and vegetables should be provided as well. The meal, cold weather ration contains 1,540-calorie menu bags. At high altitudes with extreme cold, an individual will need to consume three menu bags per day. Each case contains 12 meal bags, weighs approximately 15 pounds, and measures approximately 1.02 cubic feet.

Units that employ pack animals must account for their feed as well. For planning purposes, pack animals require two percent of body weight in dry weight of feed per day, although individual animals will vary in their need. As the temperature drops below freezing, animals will require an additional 1 percent of feed for each degree of temperature change.

The MRE ration may also be used for high altitude and cold climates; however, the MREs include components that contain liquid that can freeze during extreme cold weather operations if these items are not kept warm, such as by carrying them inside the clothing. Each MRE contains 1,250 calories. At high altitudes, an individual would need to consume more than the standard three MREs per day to meet energy demands. Each case contains 12 meals, weighs approximately 22 pounds, and measures 1.02 cubic feet.

Water requirementsits production, resupply, storage, and consumptionare often the most significant logistical challenge to extended mountain operations. Leaders should enforce an increase in water consumption for two days prior to an operation. When operating at altitude, it may be difficult to manpack enough water to sustain a unit for more than a day. Marines equipped with lightweight water purification equipment and squad stoves will be able to easily deal with the issues of procuring water. Dismounted patrols should plan for daily resupply of water, if possible. In low mountains, leaders should plan on each individual consuming 4 quarts of water per day when stationary and up to 8 quarts per day when moving. In high mountains, planners should increase these planning factors by about 2 quarts per individual.

The First Strike Ration (FSR) may be a better option for use in high altitudes where temperatures typically remain above freezing. The FSR has already been used by units operating at high altitude up to about 2,438 to 3,048 meters (8,000 to 10,000 feet) without issue. The FSR does not contain an individual heater and some items may not be palatable if frozen. The FSR includes liquid-containing components that can freeze during extreme cold weather operations if not kept warm, such as by carrying them inside the clothing. The FSR contains 2,850 calories in one ration. It is meant to be used in mobile and combat-intensive scenarios where eating on the move or out of hand is required. At high altitudes, eating small, frequent meals and consuming more fluids is advised. The FSR ration contains more In high mountains, where subfreezing temperatures persist year round, water may be extremely difficult to find unless Marines are equipped with a stove to melt snow or ice. Logistic planners and operators should explore multiple methods of water delivery to ensure water needs are being met. If available, units must rely on natural sources of water to reduce the logistic burden. It is important to remember that sterilization is always necessary no matter how clean mountain water may appear (see chap. 5). Individuals must take regionally appropriate prophylaxis medications as an additional precaution against food and waterborne illnesses. If clean snow is available, it can be melted for drinking and heated or sterilized using small squad stoves and cook sets. Clean snow is defined as snow that is undisturbed and fresh snowfall that is uncontaminated by animal waste or debris. As each gallon of water weighs approximately 8 pounds, carrying a small water filter or pump or stove and cook set for extended operation can be a weight saver, despite the added weight of fuel for the stove. Each Marine will require approximately 6 ounces of stove fuel per day to boil water and prepare food.

accumulate close to the body. Fleece caps and jackets offer warmth without weight/bulk. Cold weather boots must also be issued in a mountain/ cold weather environment. While personnel are in static positions, they should either wear overboots for warmth or stand on insulating material. Insulating material can be a pine bough or a flat piece of wood. If personnel use improper or worn clothing for even a short time, the chance of developing cold-related injuries increases significantly. Clothing should be fire retardant, if possible, although fire retardant clothing may not be available due to the transition from nonfire retardant clothing. Due to the rugged nature of the terrain, there will be an increased need to replace lost or damaged individual clothing and equipment. Boots, which should be replaced every three months; jackets; and gloves in particular will wear out quickly. In operational planning, sufficient clothing overages should be considered and clothing stocks should be built up prior to deployment.

Measures, such as placing canteens or other personal water storage containers inside clothing where they can be warmed by body heat, should be taken to protect water containers from freezing in cold weather. Plastic water cans may break if filled at extreme temperatures; hence, when in use, cans should be kept partially full and turned upside down.

In cold weather, special equipment requirements include snowshoes, boot crampons, avalanche cord, ski wax, candles, axes, shovels, matches, 100 percent ultraviolet protection glacier glasses, sunscreen, special fuel containers, tire chains, and winterization kits. A more comprehensive list can be found in MCRP 3-35.1A or ATTP 3-21.50.

Beyond individual consumption requirements, water will also be required for personal hygiene, vehicle maintenance, medical care, and pack animals; however, priorities must be set for water consumption and conservation in all areas will be at a premium. For example, in the mountains, it may be necessary to avoid cleaning the exterior of vehicles, except for windows and the undercarriage. More information can be found in FM 10-52.

Prefabricated, synthetic dome tents are useful in cold, mountainous environments. Tents must be easy to carry and assemble at high elevations and easily retrievable from deep layers of snow. Tents must also be able to withstand the weight of snow and be equipped with winterization kits, such as roll out flooring and insulation. At a minimum, leaders should plan for sufficient tentage to support command and control, health services support, maintenance, supply, food service, and hygiene.

## Clothing, Individual Equipment, And Tents (Class Ii)

In cold weather, preferred clothing consists of loose-fitting layers and insulated, polypropylene clothing that does not allow perspiration to In cold weather, tent heaters and stoves in billeting and storage areas are recommended. Heated tents will be required for storage of some classes of supply items. Refrigerator boxes may be turned off and used to keep supplies warm. Some additives to prevent freezing and gelling. In arctic conditions, fuel spilled on flesh can cause instant frostbite if the proper gloves are not worn.

units may prefer to use multifuel backpacker stoves; however, at high elevations, multifuel cook stoves will operate at a lower efficiency.

Multiviscosity oil (15W-40) is recommended for most vehicles in cold weather. Use of 15W-40 will preclude a need for frequent oil changes in an environment with a great variance in temperature. Vehicles should be changed to multiviscosity oil before embarkation. In sustained extreme cold conditions, 10W oil will be required. Cold weather mountain operations may require arctic engine oil, a synthetic SW-20 lubricant used for temperatures down to -65 F. Arctic engine oil is approved for engines, power steering systems, hydraulic systems, and both manual and automatic transmissions. For all weapon systems, lubricant, arctic weather should be used below -10 F.

In cold weather, all batteries provide less power, so a greater quantity of batteries or more frequent charging of batteries is required. Cold weather batteries are recommended, if available. Dry batteries must be stored at temperatures above 10 F and must be warmed gradually, either with body or vehicle heat, before use. In subzero weather, additional battery chargers must be on hand to meet heavy requirements for battery maintenance. Battery stocks should be replenished often, paying particular attention to items with unique proprietary batteries. Also, personnel must avoid relying on Service-specific items that require batteries not carried by the theater-level sustainment organization. In warm weather where solar energy conditions permit, leaders should plan for employing renewable energy harvesting systems, such as portable solar panel-based technologies, as an alternative to carrying excessive batteries. Regardless of weather conditions, commanders must implement an effective battery disposal plan for unserviceable battery items.

## Petroleum, Oils, And Lubricants (Class Iii)

When units are widely-dispersed, FOBs may be able to store only a limited quantity of fuel, which can limit operations when circumstances prevent timely resupply. Increased quantities of lightweight, portable fuel storage containers may be needed. Up to twice the normal number of fuel cans may be required if transporting fuel to vehicles, rather than bringing vehicles to the refueling point. Adequate quantities of 5-gallon cans, nozzles, and 1-quart fuel bottles must be available. When vehicles; generators; and petroleum, oils, and lubricants containers are brought into warm storage from the cold, fuel tanks/containers should be filled at least three-quarters full to prevent condensation. Some classes of supply will require heated tents for storage during certain times of year or above certain altitudes. Authorized fuel planners should plan for proper transport, distribution, and storage of such fuels as JP8, packaged white gas, or K1 and gauge fuel distribution according to anticipated demand and environmental conditions.

## Other Supplies

Other supplies required for logistics and sustainment include ammunition, major end items, and In steep-sloped mountains, vehicle fuel consumption may increase by 30 to 40 percent. As vehicles ascend, the amount of oxygen available is reduced and the engine efficiency drops. On average, vehicles lose 20 to 25 percent of their rated carrying capacity; however, overall fuel consumption for the unit may decrease because of lower vehicle movement. Heavy reliance on aviation assets for resupply and movement increases aviation fuel requirements. Units that operate in cold weather need to plan for multiple fuel use and storage. Fuel points must supply units with refined or white gasoline that is specifically produced for pressurized stoves. Special fuels may be needed if using host-nation equipment. Individuals may need to carry special fuel for personal or squad stoves. Some fuels may need medical supplies. Spare parts and supplies for nonmilitary programs should also be considered (see chap. 5).

## Ammunition (Class V)

Planners should expect increased consumption of indirect fire ammunition because of dead space, deep snow, and other effects of mountainous terrain. Preparing ammunition dumps is more difficult due to freezing and mud. Special storage for ammunition is not required, but it should be stored in its original containers. Ammunition will normally be transported by air from intermediate support bases to forward deployed units.

## Personal Demand Items (Class Vi)

freeze-dried material instead of liquids can be used when building the list of authorized medical stocks to minimize freezing, storing, and handling problems. Refrigerated and heated storage areas, such as warming tents, vehicles, and containers, are required for storing liquid medications and packed red blood cells or fresh whole blood that has been collected and processed on an emergency basis in theater (see FM 4-02.1, Army Medical Logistics, and MCWP 4-11.1). Perishable materials must be packaged and marked for special handling. Procedures must be established and followed for special handling requirements for Class VIII material from embarkation to its final destination. There will also be an increased requirement for lip balm, cough syrup, and decongestants. More information is presented in this chapter under Medical Support Considerations.

## Repair Parts (Class Ix)

The availability of personal demand items (e.g., sundry packages, personal health, comfort, and post exchange items) is closely tied to troop morale in mountainous operating environments. Care must be taken to avoid stocking Class VI items that have the potential to freeze in cold weather or deteriorate in excessively hot weather. For a more detailed discussion on Class VI, see MCWP 4-11.8, Services In An Expeditionary Environment.

## Major End Items (Class Vii)

Due to the increased stress on vehicle parts and adverse effects of cold weather, a unit may need to increase its Class IX block by up to 300 percent. Repair parts blocks for motor transport and engineering equipment should be increased, especially for parts that are susceptible to cold temperatures. Examples of these parts include starters, generators, alternators, and glow plugs. There will be an increased reliance on secondary repairable, component repairs, and selective component exchanges. Like other items, obtaining parts for specialized equipment can take prolonged periods in mountain operations.

## Material To Support Nonmilitary Programs (Class X)

Resupply of battle damaged major end items is a significant challenge in mountain operations. Movement of deadline equipment may clog narrow supply routes. There will be an increased demand for power generators, heaters, and rough terrain loaders with a snow removal capability. Forward-based units desiring to stay lean may not be able to stock many spare end items. When equipment is destroyed or damaged beyond repair, the only course of action may be to wait for redistribution.

## Medical Supplies (Class Viii Including Medical Repair Parts)

In mountain operations, the same protective measures and commodities necessary to protect friendly forces are also needed for enemy prisoners of war, indigenous inhabitants, and refugees. Commanders should be sure to expedite detained personnel quickly to the rear closer to such security areas as those sponsored by the host nation, a nongovernmental organization, or the Joint Force Command. Considerable effort and expenditure High consumption rates for medical supplies should be anticipated. Solid medications and

## Vehicle Operation

may be necessary to provide for native inhabitants and refugees taken into custody. Secure storage, transportation, accounting, and delivery of humanitarian supplies must be planned. Distribution of such supplies to the local populace can affect mission accomplishment as significantly as the support of kinetic mountain operations.

## Vehicle And Equipment Operator Considerations

Vehicle operation will be more difficult in the rough terrain and colder temperatures associated with mountain operations. Driver training is critical, particularly at night. Also, training is required in rough terrain and fording. Ground guides should be used when navigating sharp bends and turns and especially when pulling to the side of the road. Braking distance is generally doubled and increases with the amount of weight being carried. Every vehicle should have a complete, serviceable set of chains for all wheels. Because chains break frequently, chain repair kits should also be carried. All licensed operators should know how to properly put chains on their vehicles. Additional chains are required for trailers and towed artillery pieces. Chock blocks should be used instead of emergency brakes when parking, since emergency brakes can easily freeze when set. Air tanks should be drained when parking a vehicle to prevent condensation from freezing.

In high mountain operations, equipment must be prepared for cold weather prior to arriving in the theater of operation. Most vehicles are designed to operate in temperate climates and must undergo winterization to function properly in the cold. Cold weather kits are necessary for every vehicle and should minimally include tire chains for all wheels, tire chain repair kit, deicer, nonfreeze windshield wiper fluid, scrapers, tow bars or straps, extra chock blocks, and plastic or canvas to cover windshields to reduce buildup of ice or frost. The following subparagraphs discuss broad principles that apply to all vehicles. For specific information on pieces of equipment, the user must always refer to the appropriate technical manual.

## Vehicle Loading

All operators must be aware of the dangers that drainage ditches and soft shoulders present in most areas where heavy snowfall is expected. These areas are used to help drainage and can become easy traps for vehicles that stray too close to the side of the road. Although snow stakes are good indications of where the road is, they can often lead drivers too close to the side of the road and into a ditch. Whenever parking in cold, wet conditions, some kind of dunnage, such as tree branches, wood, or MRE boxes, should be used to park on to prevent tires from freezing to ground. If tires become frozen to the ground, antifreeze or fuel may have to be used to free them. Always park where a vehicle can be easily towed and where slave receptacles are within easy reach. Special considerations must be given to keeping engines warm and out of the weather or started regularlyat least every 3 to 4 hours. Vehicles When loading materiel in any form of transport for delivery to an area of operations, items of low priority should be loaded first. Those high priority items required first at the destination should be loaded last. Experience has shown that this principle is especially important in mountain operations. A vehicle load standing operating procedure should be established to ensure that recovery equipment, first aid materials, and battle damage assessment and repair equipment are placed on top or immediately accessible when vehicles are loaded. Due to the reduced vehiclecarrying capacity in mountain operations, personal items must be kept to a minimum and road and bridge limitations must be considered.

Personnel must be trained to recover vehicles themselves in mountainous terrain because a wrecker may be unable to reach the recovery site. Training for mountain operations should include vehicle recovery missions that use real world scenarios, such as simulated IED-/mine-damaged vehicles with different levels of catastrophic destruction, and allow for the evaluation of appropriate recovery assets selected as well as for the actual recovery mission to take place.

should be run for at least 10 minutes or until normal operating temperature is reached with the air cocks open to prevent them from freezing. The valves should be closed once the vehicle is shut down, but never all at the same time. A rotating system must be established when a vehicle is used to start another before it is shut down. Vehicles have to be operated continuously when weather is at or below -25 F. Personnel must not be allowed to sleep under or in vehicles and must remain vigilant for vehicle deficiencies that might expose personnel to carbon monoxide poisoning.

## Vehicle Maintenance Vehicle Rollover

A primary cause of death and serious injury in mountain operations is vehicular rollover accidents. Rollover drills must be rehearsed using egress trainers, if available, and equipment must be tied down in vehicles.

## Vehicle Recovery

In mountain operations, vehicle maintenance is inherently difficult because units are almost invariably forced to drive heavily-laden vehicles over uneven terrain. Road networks in the mountains are unforgiving on motorized equipment. Rocks, ever-present dust, shifts from desert heat to arctic cold, and dramatic gradient changes can take a significant toll on military motorized equipment. Overall, maintenance failures may far exceed losses due to combat.

## Maintenance Personnel

Mountainous terrain is hard on vehicles and when a vehicle breaks down, recovery is also difficult. Recovery capabilities will be adversely affected by heavy snow, extensive muskeg (bog-like) areas, unpredictable weather, and a limited road network. When these conditions occur, recovery alternatives include attempting to fix the vehicle with a contact team, towing it to a vehicle collection point, extracting it by heavy lift aviation asset, or destroying it in place. More information can be found in MCRP 4-11.4A, Recovery and Battle Damage Assessment and Repair. Recovery and on site repair by forward contact teams is preferred, if possible. In recovery operations, lightweight tow bars are useful, but may become a liability if used improperly. A minimum of two tow bars should be carried in every combat patrol. Vehicles with winches are essential. Unit vehicles can generally accomplish towing; however, wreckers or tank retrievers, if available, are more appropriate, since chains and cables can easily break loose and allow the disabled vehicle to slide.

Additional mechanics will likely be needed to support dispersed operations in the mountains. At least one mechanic should be at every FOB, with two or three mechanics preferred. The ability to drop an engine at a distant FOB is an immeasurable combat multiplier. By teaching operators the next level of maintenance (supervised by a company mechanic), units can free up the mechanics for larger, more complicated jobs. Although enemy ambushes on main and/or alternate supply routes can inflict high numbers of casualties, mechanics should be assigned to combat logistics patrols and convoys with maintenance and/or recovery assets. General support maintenance sections need to be reinforced with extra mechanics. In the mountains, companies should have access to individual operator-/crew- and field-level maintenance capability. Battalions should have individual the risk to operators and crew due to rollover. This threat is multiplied in mountainous terrain.

operator-/crew-, field-, and sustainment-level maintenance capability. Further clarification on the levels of maintenance can be found in MCWP 4-11.4, *Maintenance Operations*.

## Preventive Maintenance And Repair

Proper maintenance on springs and shocks is critical to combat the high rate of front-end failure. Torque wrench tightening of all bolts on the suspension is needed regularly. Because transmissions will break down due to the combination of added weight and dramatic gradient changes, training on transmission troubleshooting should be provided to all maintenance teams. Cold weather has a significant effect on vehicle maintenance operations as well. For more information, see MCWP 4-11.9, Ammunition Logistics, and FM 9-207, Operations and Maintenance of Ordnance Materiel in Cold Weather.

## Distribution And Transportation

Preventive maintenance is crucial in mountainous terrain and cold weather: vehicle operators must be well-trained in maintenance and driving techniques and suitable cleaning solvents and lubricants need to be available and appropriate to the weather and terrain. Units may have to adjust the preventive maintenance checks and services process to focus on items that are most susceptible to breaking in the mountains, such as HMMWV half-shaft bolts, alternator brackets, and fluid levels. For vehicles operating in rough terrain, the maintenance service interval may need to be reduced. For example, during OEF, the maintenance interval for up-armored HMMWVs operating in the mountains was reduced from 6,000 miles to 3,000 miles.

## Field Maintenance

Conventional distribution methods are challenged in the mountains, so redundant methods of distribution must always be planned. Distribution will consist of a combination of methods: airdrops, assault support, tactical vehicles, pack mules, and porters. Since ground transportation is preferred for distributing food, water, fuel, and construction material, units should be task-organized with additional motorized assets, specifically trucks. Such organization reserves more rotary- and fixed-wing assets for higher-value supplies, such as ammunition, major end items, and medical supplies.

In mountain operations, leaders need to balance operating tempo with sufficient time for proper maintenance. The ability to maintain vehicles directly correlates to a unit's ability to conduct operations. Commanders should consider alternating between motorized operations and heliborne and/or foot-mobile operations to allow vehicle maintenance teams time to make repairs. They should also set aside at least one day for maintenance each week. Heavy field maintenance is not always possible at forward-deployed locations, some items will need to be evacuated back to larger, more capable logistics hubs.

In mountain operations, the biggest distribution challenge is in transporting supplies across those last few miles to the FOB. Whereas supplies can be transported hundreds of miles to an ISB within hours or days, it may take as much or longer to move supplies much shorter distances from an ISB to the FOB. At higher altitudes, pack animals are the preferred means of transport. At altitudes where even pack animals cannot go, porters or military personnel must. While prepackaged loads are preferred at higher echelons, loads may The increased weight of sandbags, bolt-on armor, and other counter-IED protective measures on vehicles will stress the shocks, springs, and struts, leading to a dramatic increase in damaged pitman arms, tie-rods, and half-shafts. Commanders must make appropriate risk management decisions, since counter-IED safety measures also increase need to be broken up and distributed among Marines and animals at the lowest echelons.

## Ground Distribution

Methods of transportation vary in a mountainous or cold weather environment. They include a variety of vehicles, animals, and human-powered methods.

## Military Vehicles

The use of small cargo vehicles with improved cross-country mobility is paramount to sustaining units at high altitudes. For example, a vehicle that has been frequently used in recent mountain operations is the Canadian SUSV, also known as the BV 206. These SUSVs are specially designed for restrictive terrain, can operate in snow up to 1.2 meters (4 feet), and can drive over any road with packed snow. In snow, tracked, over-thesnow vehicles are invariably required for movement off roads and may also be necessary on roads in icy conditions. All-terrain vehicles are highly mobile, but may be of limited utility due to the lack of protection against enemy fires or explosive/nonexplosive obstacles. The HMMWV is a useful vehicle in mountain operations. The highback HMMWVs may be the only troop-carrying vehicle that can negotiate some of the terrain encountered. A full platoon with attachments may be transported by four highback HMMWVs on a mission. Six to eight HMMWVs can be used to support two platoons with attachments. Demand for and heavy use of the highback HMMWVs makes maintenance Operation Enduring Freedom: 1st Brigade Combat Team Experience For the 1/82 Brigade Combat Team (BCT) in OEF, a combination of CDS drops, pack animals, and rented Hilux trucks (4-wheel drive and pick-up trucks) were used to resupply the task force. Pack animals and Hilux trucks were used in combination. While all MSRs and secondary roads did not extend into the high ground, some secondary roads allowed for Hilux trucks to access the valley floor. Once the trucks traversed the valley floor, the pack animals pushed supplies from the valley floor to high ground with a few escort personnel required. Pack animals and Hilux trucks were rented from local host-nation sources in the area of operations.

difficult, so having more of them available permits rotation of vehicles in use for maintenance. The medium tactical vehicle replacement (Marine Corps 7-ton truck) can be useful in mountain operations; however, the vehicle capacity in rough terrain at high altitude is reduced by half. The Logistics Vehicle System is useful in moderate terrain, but has a limited off-road capability in snow and mountainous terrain. Amphibious assault vehicles can be used in fjords, at fords, on plowed roads, and, to a limited extent, in crosscountry movement.

## Host-Nation Vehicles

Host-nation trucks are a major source of ground distribution in mountain operations. For routine resupply of nonsensitive items, contracting for use of host-nation trucks can be essential to conserving combat power dedicated to the fight. Roads may only be able to support local trucks until engineer efforts widen and improve roads. Host-nation trucks can be configured for dry, refrigerated, and liquid cargo. For example, a fuel bladder may be placed on the bed of a host-nation pick-up truck or small truck to haul Class III supplies. Host-nation trucks, however, do have such shortcomings as the following:

 Host-nation drivers may not move into high-risk
areas without security and they may be particular about driving in certain weather conditions.
 Timelines for delivery are unpredictable and
drivers will frequently take a circuitous route to their destination to visit family, avoid enemy contact, or make other deliveries.
 Loads are often pilfered.  Local trucks may not be properly maintained
and may require frequent towing.
the mountains, a pack animal training course is recommended. See FM 3-05.213, Special Forces Use of Pack Animals, and MCRP 3-35.1C for more information.

## Porters

Movement coordinators for the MAGTF/logistics combat element working with host-nation trucks need to verify that these vehicles are maintained, loaded, fueled, and manned properly. A good relationship with the host-nation truck provider is essential to optimizing transportation capacity. Additionally, service providers should leverage other Service line haul capacity (consistent with United States Code, Title 10, Armed Forces) to meet sustainment gaps for transportation support.

## Pack Animals

Units operating in the mountains may need to hire local porters who have developed endurance and are accustomed to breathing thin air to transport equipment and supplies by foot. Porters will usually be employed to move supplies to a certain point prior to handing them over for unit movement to the furthermost dangerous forward positions. The disadvantages of hiring local porters is that they may be reluctant to work too far away from their homes and villages. For force protection/security planning purposes, commanders should provide escort to porters in order to protect them from enemy fire, indirect fire, and CBRN weapons effects. When calculating the number of porters required for a particular operation, the following factors must be considered:

 Distance of movement.  Terrain, including height above sea level.  Type of porter available.  Availability of water.  Size, shape, and weight of the loads.  Location of an area suitable for offloading
supplies.
 Escort.

## Military Personnel (Manpacking)

Pack animals, such as mules and donkeys, are an essential distribution method in mountainous terrain. For load planning purposes, mules can carry 200 pounds depending on the terrain and altitude. Donkeys, on the other hand, can only carry about 65 pounds. As a general rule, pack animals carry up to 25 percent of their body weight. While mules can travel 20 miles per day under moderate conditions, they may make only 8 to 10 miles per day in severely rugged terrain. Crude or improvised pack equipment, unconditioned animals, and the general lack of knowledge in the elementary principles of animal management and pack transportation tend to make the use of pack transportation difficult, costly, and potentially problematic to mission accomplishment. These animals require care, attention, and training; planners must account for the weight and bulk of food and water required daily and the handlers required. Animals are conspicuous, vulnerable, and can be noisy. Caring for animals takes time to learn as does preparing and tying on loads. Ad hoc animal transport units may be formed using locally obtained animals, with or without local handlers, and any personnel who have experience with animals. For units planning to operate in Any combination of resupply usually includes manpacking supplies to forward positions. Personnel are often required to carry awkward loads, including cans of kerosene, rations, and building materials for bunkers. Commanders must develop priorities, accept risk, and require the combat force to carry only the bare essentials needed for its own support. Any excess equipment and supplies will reduce the efficiency of their personnel. Nonessential equipment should be identified, collected, and stored until it is needed. In situations when there are conflicts between the weight of ammunition and weapons, experience has shown that it is better to carry more ammunition and fewer weapons. Training must emphasize foot marching over difficult terrain with heavy loads. In cold weather, movement should be conducted at a slow pace, depending upon the fitness level of the individual, to avoid sweating and cold weather injuries.

## River Distribution

Troops analyze terrain to determine if resupply by river is possible. Boats, ferries, and rafts may be employed up, down, or across rivers. While it may seem counterintuitive, it is possible to raft against the current and move into mountainsan option explored in Russian doctrine. If the river type allows, this method will mitigate the limitations of aviation assets in a mountainous environment and may release them for other missions. For example, during the Soviet-Afghan war, it would take an MI-8 MTV transport helicopter 340 to 580 flights, depending on altitude, range, and temperature, to transport the same amount of material as a 58-raft Russian model boat company.

## Air Distribution

In mountain operations, aviation assets should be maximized to deliver supplies directly to units. Aerial resupply may consist of parachute drop, free drop, or assault support asset (such as the MV-22 Osprey helicopter) delivery. During OEF, units operating in the mountains relied heavily on aerial resupply. During Operation Mountain Lion in Afghanistan, almost all resupply was conducted by helicopters and CDS drops for 5 weeks.

## Air Distribution In Operation Enduring Freedom

Due to heavy snow, ground units were unable to ford the Peshe River in the eastern mountains of Afghanistan during OEF. Subsequently, for the first few months while no bridge existed, the only way to transport supplies across the river was by air support. At one point, Army aviation assets sling-loaded and transported 20 Marine Corps HMMWVs across the river. It took 4 months to construct a bridge across the river and establish a ground-based LOC.

Inclement weather is a significant threat to aerial resupply. The operating environment must be permissive from the point of origin to the point of delivery to accomplish the mission. Fog, cloud cover, sudden storms, icing, and unpredictable air currents can quickly shut down air support. Higher elevations also decrease overall aircraft lift capabilities. For example, in the Marine Corps, a general rule used by most commanders and planners is that most helicopters cannot haul loads above 3,048 meters (10,000 feet). Temperature and density altitude can restrict an aircrew's ability to carry loads and high mountain weather conditions frequently shut down flying for days. Air distribution may be cancelled due to the inability to observe the ground or to navigate through the mountains. Mountain terrain may also interfere with air-to-ground and air-to-air communication. Aviation assets may choose to follow the terrain features of the mountains, adding predictability to their approaches and increasing the risk to the crew. As a general rule, Army rotary-wing assets can carry heavier loads and travel to higher elevations than their Marine Corps counterparts. The aircrew determines loading and altitude restrictions. Mountainous terrain can sometimes interfere with communication, but satellite communications (SATCOM) and friendly force tracking have increasingly added to the capacity for aircrews and ground forces to communicate. Aircrews choose the routes best suited for their missions and may opt for high altitude operations in areas of relatively low antiaircraft artillery and/or manportable air defense system threat. Air distribution in the mountains requires detailed planning, effective liaison, and a habitual relationship between the aviation crew and the ground unit. Suitable drop zones in the mountains will be difficult to find and, if close to the enemy, will likely be covered by mortar and small-arms fire. Aviation assets must be able to safely hover over the drop zone while supplies are distributed. Support personnel should be well-trained in sling-load operations and supplies must be packaged to be immediately manportable.

support teams trained in the recovery of airdropped supplies and in using sling loads. When using CDS, planners should expect significant load attrition (the Marine Corps considers that one-third loss is a good planning factor) even with seasoned crews. Sleds are useful in recovering CDS in the high mountains. Material handling equipment may be required at the drop zones and/or LZs. In all cases, aircrews will advise supported ground units to determine limitations.

## Ring Routes Low-Cost Low-Altitude Delivery System

The low-cost low-altitude delivery system can be used in mountain operations and has been a very successful asset when high risks prevent ground resupply options. These systems have the following characteristics:

 They might be restricted to day use.  The typical load is 500 pounds or less when
using one parachute, but up to three parachutes can be used for heavier loads.
 There is no rigger requirement.  Each parachute system costs less than $100 and
is a throwaway item.
Air transportation using a ring route might be the only way to move among various outlying bases in an area of operations. During combat operations, one ring route of regular scheduled rotarywing assets may depart from a large, centrallylocated airfield, which may be the primary means to deliver Class V items, personnel, and mail, especially to FOBs. Prioritization of supplies using ring routes must be done with caution to prevent backlogs. Due to weather, ring route flights may often change, sometimes being delayed by a week or more. Distribution planners must submit air mission requests to ensure aircraft are scheduled. Ring routes are determined by schedule and sequence.

## Speedball Technique Container Distribution System Drops

Speedballs are a field expedient technique using duffle bags or similarly-sized containers with resupply items and releasing them out the door of hovering aircraft. Items could include cold weather clothing, rations, or ammunition.

In mountain operations, air distribution by CDS is frequently used, but is a challenging and manpower-intensive operation. Use of CDS involves detailed drop zone coordination. It requires landing

## Container Distribution System Operations In Operation Enduring Freedom

During OEF, CDS drops were conducted by C-130s originating out of Bagram Airfield. Each drop consisted of up to 12 bundles of supplies that would support two rifle companies for 2 days with Class I and batteries. To arrange a drop, the receiving unit submitted a joint mission request to air mobility division (AMD) tactics at Bagram through the brigade administration and logistic operations center. The receiving unit would submit an 8-digit grid location along with imagery of each drop zone to AMD. The receiving unit selected at least three drop zones to account for both enemy activity and rugged terrain that hindered movements. The AMD reviewed each proposed drop zone and either approved it or requested that the unit move the location to an area that AMD felt was more suitable for a successful drop. Ultimately, AMD would maintain final approval and the brigade administration and logistic operations center would conduct direct coordination with AMD and the aircrews. Intense planning for accurate drops was a must. Due to the extreme nature of the terrain, a delivery that is only about 200 meters (650 feet) from the intended location might result in the loss of more than half the bundles or a recovery time of several hours.

## Medical Support Considerations

In a cold, mountainous environment, personal hygiene will be more difficult to maintain due to limited water and the inconvenience of bathing. The potential for the spread of infectious diseases is increased by condensed living spaces shared by multiple individuals. Field hygiene and sanitation must be emphasized. Personnel should also use sunscreen and sunglasses to prevent severe sunburns, which are possible at high altitude or in snow-covered environments. For small unit operations with widely-dispersed forces, all personnel must be well-trained in combat lifesaver and CASEVAC procedures, including the following:
Medical personnel have some unique training requirements for mountain operations. Hoist operations should be a planning consideration for medical units operating in mountainous areas. Prior to deployment, units should receive training on how to hoist or drop patients. They should be familiar with high, steep angle rescue and the equipment used in hoist operations, preferably using actual air platforms in rugged terrain. All medical personnel must be trained prior to deployment on air CASEVAC and equipment used in hoist operations, preferably using actual air platforms in rugged terrain. Mountain operations require evacuation teams, preferably Level 2 mountaineers, who have the capability to reach, stabilize, and evacuate casualties in the steepest terrain. All personnel should be trained to conduct less technical, steep-slope evacuations.

 Self and buddy aid, advanced first aid, and
field sanitation.

## Casualty Collection And Evacuation

 The self-application of tourniquets or pressure
bandages to control bleeding that may be life threatening.
 The use and capabilities of the CASEVAC bag
and poleless litter, including combat lifesaver and higher levels of first responder care.
 The ability to transmit a 9-line medical evacuation (MEDEVAC) request and setup of a helicopter LZ.
Casualty evacuation is the movement of casualties aboard nonmedical vehicles or aircraft. Casualties transported in this manner may not receive proper en route medical care or be transported to the appropriate medical treatment facility to address the patient's medical condition. When possible, nonmedical vehicles should have a combat medic or combat lifesaver on board. On nonmedical aircraft, sufficient space may not be available to permit a caregiver to accompany the casualties; moreover, the type of en route monitoring or medical care and/or first aid provided may also be limited. Casualty evacuation should only be used in extreme emergencies or when the MEDEVAC system is overwhelmed. Mountain operations present numerous challenges for casualty collection and evacuation. Leaders should consider the following when planning mountain operations:

 Difficulty associated with accessing casualties
in rugged terrain.
 The increased need for technical mountaineering skills for CASEVAC.
Each squad (but preferably each fire team) should have at least one trained combat lifesaver to augment the squad's corpsman or combat medic. Also, MEDEVAC crew chiefs should be combat lifesavers in order to assist, if time and the mission allow, during flight operations. Corpsmen should be EMT [emergency medical technician] qualified. Given the distances involved, en route patient care is vital. Corpsmen should have live tissue training, such as that offered in the civilian Operational and Emergency Medical Skills course. Medical providers should be trained in diagnosing and treating low orthopedic and low back injuries. Corpsmen trained in providing spinal and muscular manipulation can apply these skills to prevent back injuries.

 Proximity of expert medical help.

## Acclimatization

 Longer periods of wait time for CASEVACs.  Prior to evacuation, injured and immobilized
patients are at the greatest risk of cold injury and they must be well insulated during transport.
 Evacuating the wounded from mountainous
areas normally requires a larger number of medical personnel and litter bearers than on flat terrain. Soviet experience in the mountains of Afghanistan proved that 13 to 15 people might be involved in carrying one patient.
Regardless of an individual's standard of physical fitness, all personnel must acclimate in order to be effective and to prevent associated altitude injuries. Acclimatization achieves maximum physical and mental performance and minimizes the threat of altitude-related illness. Mountain warfare training is not a substitute for the acclimatization process, but it does provide personnel with an appreciation for the challenges of surviving and fighting in a mountainous environment.

 Tough, physical casualty handling should be
conducted in every training event.
Each unit should have a detailed CASEVAC plan that is repeatedly rehearsed. Each FOB must have ground evacuation assets and a dedicated security element. The security element should be on call and familiar with primary and alternate routes to higher roles of care (roles 2 and 3). Commanders must clearly consider what levels of risk they are prepared to accept to air evacuate patients using nonmedical aircraft.

## Medical Evacuation

Acclimatization is required before undertaking extensive military operations. Even the most physically fit Marines experience physiological and psychological degradation when thrust into high elevations. Time must be allocated for acclimatization, conditioning, and training. There is no shortcut for the acclimatization process and any attempt to trim or bypass the process will result in injuries. Commanders should see MCRP 3-02A, Marine Physical Readiness Training for Combat, to build physical fitness plans that will help prepare personnel for operations at altitude. For most troops at high (2,438 to 3,962 meters [8,000 to 13,000 feet]) to very high (3,962 to 5,486 meters [13,000 to 18,000 feet]) altitudes, 70 to 80 percent of the respiratory component of acclimatization occurs in 7 to 10 days, and 80 to 90 percent of overall acclimatization is generally accomplished within 2 weeks to 1 month. Maximum acclimatization may take months to years. Acclimatization cannot be accelerated; some troops acclimate more rapidly than others and a few may not acclimate at all. There is no reliable way to identify those who cannot acclimate except by their experience during previous altitude exposures. When brought to lower altitudes, all personnel will lose their acclimatization in a matter of days.

A MEDEVAC is performed by dedicated, standardized MEDEVAC platforms (ground and air ambulance platforms), with medical professionals who provide the timely, efficient movement and en route care of the wounded, injured, or ill persons from the battlefield and/or other locations to the supporting medical treatment facilities. Air MEDEVAC of seriously wounded personnel is the preferred method in mountain operations. Positioning aviation assets forward on the battlefield is critical to supporting such operations; however, during periods of decreased visibility and high winds, these assets may not be able to fly and/or land in extreme mountainous terrain. Hoist operations are inherently dangerous and can result in fatalities if preventive measures are not considered. Personnel need training prior to deployment on MEDEVAC procedures and the equipment used in hoist operations.

To acclimate troops in high mountains, use one of two methods: staged ascent or graded ascent. In a sleep low is a rule of thumb (e.g., sleep 1,000 feet lower than the working elevation.) Once they have ascended to 2,438 meters (8,000 feet), troops should gain no more than 300 meters (984 feet) of sleeping altitude each day. This process significantly reduces high-altitude illnesses. A combination of staged ascent and graded ascent is the safest and most effective method to prevent highaltitude illnesses.

staged ascent, troops ascend to a moderate altitude (2,438 to 3,962 meters [8,000 to 13,000 feet]) and remain there for 4 days or more to acclimate before ascending higher. When possible, troops should make several stops during the ascent to allow for increased acclimatization. A graded ascent limits the daily altitude gain to allow partial acclimatization. The altitude at which troops sleep is critical to acclimatizationwork high,

## Chapter 7 Aviation

This chapter covers the functions of military aviation in support of mountain operations. The basic functions of Marine aviation do not change when operating in complex and compartmentalized terrain, high altitude, and cold/all weather conditions. However, there are unique considerations and limitations associated with some of these functions when operating in these conditions, all of which are found in mountainous environments. Many of the limitations to these functions can be minimized or mitigated through understanding the planning and training considerations for the aviation combat element (ACE).

ground troops. The objective is to have aviation forces available to the dispersed units for planning and execution on short notice so they can quickly react to intelligence and support ongoing ground operations. Dispersed operations impart increased risks for the ACE commanders as it is more difficult to provide supply/resupply, a full echeloned maintenance capability, fuel, forward deployed ordnance, command and control, and security when aviation units are not centrally located with these support functions. For the ground commander, this environment imposes difficulties in surface transportation, which creates an increased demand for aviation support. The delicate balance among such factors requires careful planning and a solid understanding of aviation capabilities among the Services. The paragraphs in this chapter discuss some of the most important planning considerations for each of the six functions of aviation plus ground and logistic support. Understanding these considerations and applying them in combat will help the commander and his/her staff achieve mission success.

## Antiair Warfare Planning Considerations

In general, aviation operations will require additional time, planning, equipment, and personnel in order to operate successfully in this environment. The ACE must strive to affect the mission in all weather conditions and all environments. Mountain weather conditions that can limit or ground some aviation assets are clouds, fog, heavy rain, and whiteout. Icing presents a problem to aircraft that do not have anti-icing equipment. Aircraft with those capabilities are capable of safe instrument flight into clouds or visible moisture when the temperature is below freezing; however, their ability to influence and support the ground scheme of maneuver may be limited. The weather and environment can also greatly affect ground maintenance. The climate history of the operational area should be studied to determine the probable frequency and duration of weather conditions that will limit or preclude flight operations and the support ground units can expect from them.

Severely compartmentalized terrain presents a number of unique challenges to ground-based air defense assets. Primary among these challenges are communications, mobility, logistics, cueing, and tactical employment.

## Communications

Aviation units should be deployed to best support the troops on the ground. Unlike many other environments, mountainous environments require the MAGTF commander, ground task force commander, or joint task force commander to use dispersed operations to effectively support their Mountainous terrain severely precludes the use of very high frequency (VHF) radio assets except in short-range, LOS situations. The nature of low ground-based radar assets. The terrain will limit what ground-based radars can see and can limit communications with the identification/engagement authority, extending the amount of time to gain approval authority to prosecute a threat (kill chain). Air defense planners should attempt to decentralize identification and engagement authority to the lowest level possible given rules of engagement and mission constraints. Planners should coordinate with airborne early warning platforms to maximize the amount of cueing that teams can receive.

altitude air defense (LAAD) or short-range air defense unit employment is such that the tactical dispersion of surface-to-air missile teams, sections, platoons, and batteries will render VHF communications unreliable. Solutions that can be fielded within the battalion include SATCOM assets and high frequency (HF) radio assets. In addition to organic communications assets, LAAD or short-range air defense planners should explore the possibility of nonorganic communications support, such as the use of an airborne communications relay, if such assets are operating within the area of operations.

## Unique Capabilities And Limitations Of Marine Corps Low Altitude Air Defense Mobility

Given that typical air defense operations are motorized, mountainous terrain will limit the mobility of the teams. Foot-mobile, LAAD teams can carry a limited number of missiles and batteries and a limited amount of communications equipment, food, and water. It is difficult for a dismounted LAAD unit to execute sustained operations. Options for the LAAD planner to consider include inserting helicopter/tilt-rotor teams if the assets are available or dispersing dismounted teams from a rally point or points that are accessible by vehicle. The most constricting terrain may require the use of pack mules.

The current air defense weapon within the Marine Corps LAAD battalion is the Stinger missile, a shoulder-fired, fire and forget missile. Although early warning and cueing from ground-based or airborne radars can help the gunner locate a potential threat quickly, the Stinger does not depend on cueing to fire, which makes it a very effective and highly mobile weapon platform. One disadvantage the LAAD team faces in the mountains is the enemy's ability to mask its terrain, which challenges the gunner's ability to see and engage the target. Additionally, down-angle shots against aircraft that have background clutter may reduce the probability of a successful engagement.

## Logistics

Mobility constraints affect not only the air defense teams, but also their logistic support. Planners anticipate that the ability for vehicles to support resupply efforts will be limited so they should explore the use of helicopters, airdrops, and pack mules to sustain the force. Creative resupply options, using gas station or tailgate logistics or a combination of the two, based on METT-T and space and logistics should be considered.

## Cueing And Tactical Deployment

Compartmentalized terrain impacts air defense unit employment and the ability to receive electronic early warning and cueing from When tactically employing a LAAD unit in mountainous terrain, general support missions are preferred over direct support missions. Direct support missions, such as air defense of a maneuvering infantry unit, will likely lead to teams employed in locations with limited fields of fire and reduce the time available for gunners to engage enemy aircraft. However, some missions, such as air assault missions, are effective direct support missions in the mountains because they are generally isolated and provide mobility to the teams being inserted. General support missions, on the other hand, allow the LAAD unit to maximize the advantages of the terrain and minimize the disadvantages. Planners should seek to employ the units based on terrain and likely enemy avenues of approach. High vantage points with excellent visibility and fields of fire abound in the mountains; hence, teams can be placed to provide overlapping, mutually supporting fire over likely enemy avenues of approach within the unit's area of operations. Planners should keep in mind that employing in this manner may require teams to locate in remote, austere locations, increasing the need for security to protect them from ground attack and their logistical footprint.

type or mission, can provide valuable intelligence and conduct air reconnaissance as a secondary or concurrent mission. Reconnaissance is most successful only if ground and aviation units communicate and exchange information. Prior coordination and participation in mission planning can alert pilots to look for critical intelligence information that is helpful to the maneuver forces. It is also important that ground personnel or LNOs participate in mission debriefs whenever possible to extract critical information about the enemy terrain or weather and to insure this information is passed to the units who need it.

## Suppression Of Enemy Air Defenses And Air-To-Air Planning Considerations

Aircraft specifically designed for the reconnaissance mission may be available to ground forces, providing real-time information to the ground force commander. Thermal imaging, forwardlooking infrared, and day-time television recording provide commanders and Marines with an accurate depiction of what aircrews are seeing and how it may affect their operations. The most widely used air reconnaissance platforms in mountain operations are rotary-wing aviation and UASs.

Aircraft performance may be degraded when attacking surface-to-air threats in high altitude environments, since height above target may affect fuzing and ordnance delivery. Geometry of attack and weather are also considerations in this environment. Detecting air-to-air threats, groundcontrolled intercepts, and overall radar coverage will be affected by mountainous terrain because of the numerous radar blind zones caused by the mountains. A good IPB can map these blind zones and limit these effects.

## Attack Reconnaissance Helicopter Operations Training Considerations

The use of rotary-wing aircraft to conduct reconnaissance operations enables the ground forces to have additional maneuver and effect. Rotarywing assets can be either planned, in the case of an air mission request, or unplanned, such as an established quick reaction force. These platforms can also provide mobile and stationary security coverage for ground forces during operations as a screening force, providing ground forces with reaction time and maneuver space on the battlefield.

When preparing to operate in mountainous environments, air defense units need to focus their training efforts specifically on the area of operations. Every effort should be made to conduct mountain warfare training, to include survival, first aid, rope skills, climbing, mountain communications, and mule packing. Depending on the area of operations, cold weather mountain training, to include cross-country and alpine skiing, may also be appropriate.

## Air Reconnaissance

While some aircraft have air reconnaissance as their primary mission, all aircraft, regardless of Given the compartmentalized nature of mountainous terrain, the ACE may choose to divide attack reconnaissance aircraft and lift and cargo helicopters into smaller maneuver elements that are part of an aviation task force to provide the ground force commander with a wide range of aviation support options.

## Unmanned Aircraft Systems

The addition of UASs to the piloted capabilities increases the reconnaissance capability of forces in the mountains. These aircraft are generally assigned the following tasks in all environments:

 Conduct air reconnaissance.  Analyze and synthesize information.  Control indirect fire.  Conduct terminal guidance operations.
Planners must make some special considerations in mountainous environments regarding UAS planning, hub and spoke operations, and fires integration, which are discussed in the following subparagraphs.

## Unmanned Aircraft System Planning Considerations, Capabilities, And Limitations In Mountains

Terminal guidance operations are those actions that provide electronic, mechanical, voice, or visual communication to approaching aircraft and/or weapons regarding a specific target location (not to be confused with terminal attack control). Additionally, deployed unmanned aircraft squadrons may also be tasked to conduct radio retransmission for a supported unit. Radio retransmission allows the UAS crew to communicate with ground forces using the aircraft. The UAS may also be configured to be used only by the supported ground element to overcome environmental limitations in the mountains for internal unit communication. Mountain operations using UASs are affected by several unique planning considerations (see app. C). More information on UAS considerations can be found in MCRP 3-42.1A, Multi- Service Tactics, Techniques, and Procedures for Unmanned Aircraft Systems (UAS). The following are the most important UAS considerations in a mountainous environment:

 Altitude, air density, and temperature; for example, the RQ-7B Shadow cannot be commanded above 4,572 meters (15,000 feet) or operate in temperatures below -4 F or above 122 F.
 Aircraft icing at the operating flight altitude,
icing is often more prominent at higher mountain elevations.
 Communication restraints are caused by mountainous terrain and LOS constraints between the unmanned aircraft and the controlling station.
 High winds typical of mountainous terrain are
often channeled through valleys and mountain passes. Smaller unmanned aircraft are generally more affected by severe weather than their manned counterparts. High winds, turbulence, and wind shear will negatively affect the flight profile of unmanned aircraft. It can cause the aircraft to make wider turns, rapidly change altitude, cause erratic flight, or cause a departure from the controlled flight.
 Climb and descent rates of most types of
unmanned aircraft are affected by the higher elevations. Planners must account for longer launch and recovery times for their aircraft, especially when supporting the acquisition of time-sensitive targets.
Due to the higher elevation, the recommended unmanned aircraft flight profile may not be the most efficient for its payload. Rotary- and fixed-wing aircrews, UAS operators, and command and control operators and/or controllers must be extra vigilant when integrating unmanned aircraft into the airspace control plan due to the restrictive flight environment and numerous obstacles and/or hazards to flight in mountainous terrain. Congested airspace surrounding FOB airfields and canalizing terrain can cause flight paths to encroach and may cause midair collisions. Aircrews must be provided with current UAS restricted operations zone information as they check in with individual units upon crossing unit boundaries. Constant attentiveness to airspace tasking orders, airspace control measures,

## Fires Integration

immediate restricted operations zones, and civilian helicopter and fixed-wing aircraft traffic can prevent catastrophic consequences.

## Marine Corps "Hub And Spoke" Operations

The UAS scheme of maneuver will be dictated by the mountainous terrain and inherent LOS limitations. Hub and spoke or handoff operations, which can extend the coverage area of a single UAS, can be used in this environment. For example, crews for a medium-sized tactical UAS can launch and recover from a central hub or launch and recovery location and electronically pass control of the unmanned aircraft and its payload to other UAS control locations (spokes) near the desired operational area. The hub retains responsibility for mission tasking and maintenance of the unmanned aircraft. The spoke, or receiving control station, is responsible for mission execution and tactical employment according to the supported unit's requirements, which allows units to overcome UAS LOS limitations presented by high terrain, great distances, or large areas of responsibility, such as those encountered in Afghanistan. A single, centrally-located UAS unit may service several areas of operations simultaneously, depending on availability of personnel and equipment.

Planners for UASs must stress the capabilities of their system in integrating fires (aviation and surface-to-surface) within the objective area. Movement within mountainous terrain is difficult and time consuming; however, UASs can assist forward observers, rotary-wing aircrews, and forward air controllers (FACs) in observing targets and calling for artillery fire, to include Excalibur and/or HIMARS [High Mobility Artillery Rocket System] fires from a remote location instead of from an observer near the target area. Commanders of UASs are qualified to conduct call for fire; they can use the ground control station's video display to locate targets and request fires from the fire support system by radio or some other digital means. Those unmanned aircraft equipped with a laser target designator can deliver precision fires by designating the locations of the target for laserguided weapons, while some larger unmanned aircraft carry their own weapons. The UAS video can be fed directly to the fire support coordinator, joint fires observer, air officer, FAC and/or joint terminal attack controller (JTAC), or attack reconnaissance helicopter aircrew through numerous digital methods. For example, Marines use the One System Remote Video Terminal or Remote Optical Video Enhanced Receiver. Marine unmanned aerial vehicle squadron combat operations centers can be physically located with the fire support coordination center, while the UAS control station can be located forward with the supported unit's combat operations center as a spoke.

For Marine Corps personnel, positioning spokes with operators and a ground control station at or near the supported commander's command post can enhance the responsiveness of the intelligence production process. Spokes may be located with COPs or with various fires and maneuver units. Hub and spoke operations depend on effective coordination between personnel at the hub and those at the spokes to conduct the handoff of unmanned aircraft. The UAS units must rely on timing and procedural control or employ radios, landlines, and secure local area networks to communicate between the hub and outlying spokes during unmanned aircraft handoffs (see fig. 7-1 on page 7-6).

Coordination between armed helicopter aircrews or armed UAS controllers can enable a cooperative engagement between the two systems, during which UASs enabled with armament or a laser designator can fire or designate reconnaissance aircraft for attack. Such engagements require direct communication between the UAS observer and/or controller and the aircrews. This method may also be known as manned and unmanned teaming, or MUM-T, which helps to overcome some of the LOS limitations, ensures the information gets to the people who need it most, and shortens the sensor to shooter loop. As with any system, UAS proficiency requires units to train in similar environments to that in which they will operate.

## Assault Support

Mountain operations will result in a decrease of troop capacity, combat radius, endurance, and payload. These same limitations apply to all rotary-wing and assault support aircraft in the joint inventory.

## Air Delivery

angles, confining terrain, variable mountain winds, and limited avenues of ingress/egress, use of externally-delivered or air-dropped supplies may be required instead of internally delivered cargo offloaded in the LZ. Helicopter/tiltrotor external delivery requires the support of helicopter support teams (HSTs), which are needed to hook up external loads for transport. Due to the dispersed nature of mountain operations, additional personnel should be trained in these skills so they can be available to the receiving units as well. Planners should consider operating aircraft and HSTs out of multiple dispersed locations and using forward arming and refueling points (FARPs) to mitigate the effects of weather and terrain on the availability of support provided.

Mountainous terrain imposes unique requirements on usable LZ terrain to deliver supplies in support of ground forces. Due to higher slope Higher elevations and higher temperatures negatively affect the lift capability of assault support aircraft. Due consideration should be given to the location of the PZ and drop zone, the weight of the load(s) to be inserted/extracted, and the time required to transit to/from the location. More assault support aircraft will be required to deliver supplies in the mountains due to the higher altitude's effects on aircraft performance; moreover, if more assets are not available, then a larger number of sorties will be required to accomplish the same tasking.

personnel, or other personnel, as determined by the Secretary of Defense, who are isolated, missing, detained, or captured in an operational environment. The effects of weather on isolated personnel and their ability to endure the conditions until recovery forces can locate, authenticate, and recover them should be analyzed. Pilots and crews must be trained to survive in harsh conditions and survival kits should be prepared accordingly. High mountain winds and limited LZs may inhibit the recovery forces' ability to land close to the isolated personnel and/or aircraft, further delaying the recovery effort and limiting the TOS available for supporting aircraft. Lastly, weather will affect the responsiveness of recovery aircraft and may impede the recovery force from reaching isolated personnel should the supporting assets be operating from dispersed locations and/or conducting operations spanning impassable mountainous terrain that has been closed by weather.

While external air deliveries place supplies and/ or logistics in a precise drop location, air delivery by air-drop loads allows assault support assets to remain in flight during the drop, which, in most cases, allows a larger and/or heavier load to be delivered and decreases the vulnerability of the aircraft to indirect fires during the delivery process. Precise coordination between air delivery aircraft and supported ground assets is required to ensure that dropped loads fall in the correct locations. Due to the variable nature of mountain winds and the confining nature of terrain, air delivery by air-dropping may spread dropped supplies over a larger area and is usually not the preferred method.

## Combat Search And Rescue And Tactical Recovery Of Aircraft And Personnel

Terrain will almost certainly hamper communication between the rescued individuals and the forces trying to locate them because of LOS communication restrictions, so planners should consider using over-the-horizon communications capabilities. Aerial relays, SATCOM, and other techniques will have to be employed by communications planners to locate and communicate with aerial and downed personnel. Detailed information on the planning and execution of tactical aircraft and personnel recovery can be found in FM 3-04.513, Aircraft Recovery Operations, and FM 3-50.1, Army Personnel Recovery, respectively.

## Medical, Casualty, And Air Evacuations

Both combat search and rescue and tactical recovery of aircraft and personnel missions require pre-established criteria for the launch of assets. These missions involve a coordinated effort among several organizations, all of which are challenged by the mountainous terrain, dispersed forces, and weather. Such challenges include communications, isolated personnel detection, lift, and time on station (TOS) capability of helicopters used to conduct the rescue and/ or recovery.

As with any assault consideration, the effects of mountainous terrain on the responsiveness and capabilities of aviation assets supporting a medical, casualty, or any air evacuation will be affected by supportability of LZ terrain and the TOS and/or lift capability of supporting assets. The need to deliver patients to appropriate medical facilities as Personnel recovery is defined as the sum of military, diplomatic, and civil efforts to affect the recovery and return of US military, Department of Defense (DOD) civilians, DOD contractor planning for and execution of air assaults is found in MCWP 3-24, *Assault Support*.

## Airborne Command And Control

Weather permitting, commanders should consider the use of organic and joint airborne command and control capabilities to mitigate the effects of limited LOS communications in mountainous terrain. Rotary-wing platforms, such as the Marine UH-1Y, give the commander the ability to use LOS communications with aviation and ground forces and to land directly in an LZ to build the commander's situational awareness or communicate directly with forces on the ground.

fast as possible (commonly referred to as the golden hour) motivates rescuers to use the fastest aircraft available unless they must evacuate large numbers of personnel. In offensive operations conducted over complex terrain, assault support ability to transport injured personnel to the appropriate level of care may be limited by weather, which increases the risk and decreases the chance of survival for critically injured patients. To mitigate these risks, planners may have to disperse aircraft and position them closer to the operating forces or establish medical care facilities farther forward to cut down the travel time. If larger force extraction is required, heavy lift assault support assets at higher altitude often offers the quickest means to move forces to safety. Planners should consider using intermediate shuttle LZs to facilitate hasty extractions.

## Combat Assault Transport

A Marine Corps organic aviation platform capable of providing limited command and control capability is the MV-22. Although the communications capability and visibility inherent in the UH-1Y are more limited in the MV-22, this platform does offer the commander the ability to refuel in flight, extending the available TOS. Much like the MV-22, the Marine KC-130 can provide the commander the ability for extended overhead operations and communications without the need to land in the vicinity of the operating forces. In addition, there are numerous other joint airborne command and control capabilities that can increase situational awareness and mitigate the effects of terrain. Commanders and their staffs should request the use of these assets through normal joint tactical airstrike request procedures to augment their own capabilities and mitigate the effects of weather and terrain in the mountains.

## Battlefield Illumination

High altitude assault operations, to include aerial resupply, are restricted due to the combined effects of canalizing terrain and mountain weather. At higher elevations, zone size, slope, and suitability for large-scale assault support landings must be tempered with the desire to rapidly build combat power up in the LZ. Assault support aircraft planners require detailed analysis of the LZ suitability, the forecasted weather, the anticipated loads (passengers and cargo), and the requirements for transit and loiter in the objective area. Based on the impact of the weather at higher elevations and the limits imposed by aircraft performance and aircrew, dispersed operations will likely be required to facilitate timely support for the ground unit. Commanders must recognize that timely support depends on aircraft availability and the location of supporting assets. Cold weather, mountainous terrain, and dispersed operations will hamper security, maintenance, and logistic support, which will adversely affect aircraft availability in support of the ground scheme of maneuver. Further information regarding the In order to maintain situational awareness for Marines being transported, assault support assets should plan for battlefield illumination in a mountainous environment. While conducting low light operations, battlefield illumination will help to mitigate the effects of brownout and/or whiteout landings. In low light environments, proper planning of the objective area geometry, combined with the coordination of assets to employ battlefield illumination, will enhance the capability of assault support assets to accomplish the mission more effectively. Though battlefield illumination does not turn low light into high light, planners should consider employing both overt and covert illumination in a theater of operation. Battlefield illumination should be requested in advance and made available to conduct such operations; however, if all personnel have night vision goggles, then battlefield illumination would be superfluous and counterproductive.

## Landing Zone Considerations

areas, escape/departure routes, dropoff, waveoff, elevation, density altitude, and power available versus power required. As assault support performance decreases, the transition period becomes more critical, approaches must be shallower, and transitions must be gradual. As the height of obstacles increases, larger LZs are required to facilitate appropriate approach angles and/or speeds and aviation planners should be consulted to ensure that the LZ meets their approach criteria. Additionally, planners must consider the number of aircraft that are required to land in order to support operations. Although prevailing winds should be a key factor for landing direction, terrain produces local wind effects that could also be dangerous during landing or takeoff from the LZ. Further guidance on effective air assault mission planning and LZ and/or PZ selection criteria can be found in ATTP 3-18.12, Air Assault Operations, and in FM 3-21.38, Pathfinder Operations.

## Snow-Covered Terrain

Special considerations must be made when choosing and/or evaluating an LZ for operations in mountainous terrain. The effects of high altitude on assault support aircraft include decreased hover power, decreased forward airspeed limits, susceptibility to blade stall, vortex ring state, and decreased maneuverability. Planners, working with aviation leadership familiar with the area of operations, should evaluate landing sites, considering LZ size and suitability for the mission. Aviation requirements for altitude, prevailing winds or weather, and safe approach and departure paths may further limit the selection of certain LZ and/ or PZ sites, but aviators endeavor to meet the needs of ground forces within those limitations. Together, ground forces and aviators should select LZs that will be frequently used as part of routine air movements, such as FOBs and COPs. These sites should be well marked and, if available, lighted by either visible or infrared position lights. Portable systems can be acquired through military supply and can decrease the overall risk associated with confined or low light LZ operations, especially when aircrews may be operating frequently under night vision systems. Landing zones that will be used only once for assault operations should be carefully chosen with input from the aircrews that will be performing the air assault.

Brownout and whiteout can cause spatial disorientation. Winter operations in mountains bring recurring snowfalls that are characterized by deep, dry, powder-like snow, particularly in very high elevations. Viable whiteout mitigation plans are mandatory in these conditions. The procedures for landing in snow-covered terrain are similar to desert landing approaches and should be briefed before execution. Aircrews should make situational calls to facilitate referenced landings by pilots. Recommended waveoff cues should be briefed to ensure a safe, controlled approach into a high altitude, snow-covered landing. The aircrew should consider terrain beneath the surface of the snow to ensure safe touchdown of landing aircraft. To assist with the landing site, the landing points should be marked with an object that contrasts with the snow to provide a reference for depth perception. The aircrew must also consider a slow release of power in settling the landing aircraft to ensure stability of the landing gear on unknown, snow-covered terrain.

Further considerations include the height and size of obstacles, slope, suitability, topography, wind direction, demarcation line, turbulence, null

## Marine Air Command And Control System Considerations Air-Ground Integration And Training Considerations

Training specific for a mountainous environment may be required, depending on the proposed operational environment and aircrew proficiency and familiarization with their supported ground unit. Overall, mountainous terrain does not adversely affect the manner in which assault support aircraft conduct basic training to support operations; however, commanders should focus training toward preflight planning in high altitudes with an emphasis on fuel planning, weight and power available, and blade stall considerations. Mountain flying requires close attention to aircraft and engine performance throughout mission planning and its impact on flight; however, the terminal operations of landing and takeoff differ little from confined area landing training that is accomplished regularly as part of unit workups. Crews need a thorough understanding of their aircrafts' capabilities, especially density altitude and its effects on performance. When possible, aircrews should train with their supported ground unit prior to deployment, ensuring a thorough understanding of ground force TTP and operations. Such training allows ground forces to become familiar with various aircraft employment methods and aircrews to understand how they will be employed during combat operations. Aviation forces support ground operations.

The MAGTF's command and control is provided by the Marine Air Command and Control System (MACCS). In mountainous environments, MACCS units will be geographically separated by great distances in order to better support the commander. For example, Marine mobile air traffic teams may be pushed out to austere sites to provide tower control to transiting aircraft. Liaison teams may need to be pushed out to the GCE to provide situational awareness about aircraft transiting to and from its area of operations. Due to the terrain, the MACCS must rely on numerous agencies and possibly on joint and coalition units to facilitate control of the MAGTF's airspace. Airborne extensions of MACCS, such as tactical air controller (airborne) and assault support controller (airborne), may be necessary; moreover, MACCS planners must consider gaps in coverage due to limited TOS. Aircraft and any special hardware required for the mission must also be anticipated prior to the execution of any missions. If the MACCS requires airborne extensions, its exact role and responsibilities should be proliferated by the tactical air command center (TACC) to the rest of the MACCS to ensure that all MACCS agencies and their extensions have well-defined command relationships and proper delegations of authority. Figure 7-2 shows how the MACCS would deploy to support aviation operations.

## Changes To Standard Organization Marine Corps-Specific Control Of Aircraft And Missiles

Every MACCS agency is task-organized to support the MAGTF at all levels; however, in mountain operations, many MACCS agencies will support the MAGTF at much lower levels than they are normally tasked to support. This situation could create additional manpower requirements that must be considered during the The following subparagraphs focus on Marine Corps command and control of aircraft and missiles. While the discussions center on Marine aviation command and control organizations, the principles discussed are applicable to all aviation command and control organizations.

Delegation of authority is a key consideration for MACCS agencies during dispersed operations. Once established, this command relationship must be proliferated and maintained throughout the MAGTF, so the Marine TACC acts as the only MACCS agency that exercises command. For example, an air support element that conducts the same mission as the DASC may own its own airspace but still be subordinate to the DASC; it could work directly for the TACC and be adjacent to the DASC. The established relationship must be agreed upon prior to the execution of operations.

planning process. In decentralized combat operations in a mountainous environment, MACCS agencies may support individual companies or battalions, which will likely not be the senior GCE component. As the main effort shifts, units of the MACCS will need to be flexible in their support. Marine air traffic control mobile teams may need to displace in order to provide air traffic control services to austere sights as required by the GCE. Another example could be direct air support center (DASC) or UAS liaisons pushed down to a company or battalion level to ensure those units have the ability to request manned or unmanned air support.

## Additional Equipment And Personnel

The requirement for additional SATCOM gear and dedicated nets must also be planned. Additionally, HF communications are necessary to communicate with other MACCS agencies and GCE command and control nodes. Multichannel communications may not be able to support data connectivity due to LOS constraints; therefore, HF and SATCOM must be used to achieve data functionality. Since all MACCS units could face additional personnel requirements in the event of dispersed operations, they may also need to task small unit leaders as direct liaisons to GCE and other ACE units, depending on the level of support required by the GCE. The qualifications of these personnel may vary greatly and could require additional training with the units they are supporting prior to deployment. Also, due to the additional SATCOM and HF single-channel communications requirements, personnel that are sent to austere sites must understand the operation of these types of communications. Security at these austere sites will also be a factor.

## Training Considerations

The MACCS units should continue to train to their output standards regardless of the operational environment; however, it is imperative that commanders provide their intent as well as updated mission-essential tasks that may better suit operations in a mountainous environment. The MACCS agencies should also include training on current beyond-LOS capabilities because of the communication constraints in a mountainous environment. Wing communication squadron Marines would likely be required to set up relay sites within the compartmentalized terrain to provide LOS communications. These Marines should train to this task at the appropriate venue.

## Tactical Air Operations Center Considerations

The tactical air operations center (TAOC) provides surveillance, traffic, and positive radar control services to the MAGTF. Employment of the TAOC, a task-organized early warning and control (EW/C) site, or an early warning site in mountainous terrain presents certain limitations. Radars are an LOS means for detecting and controlling aircraft. Mountainous terrain greatly limits LOS to ground-based radars, which limits the ability of radar to identify, acquire, and track aircraft; positively control them; or cue other air defense resources to a threat. To mitigate limited ground-based radar coverage, planners may consider augmenting it with an airborne radar platform, such as the E-3 AWACS [Airborne Warning and Control System] or E-2 Hawkeye, using data links to share the air picture. Further limitations exist with radio communication. Most aircraft controlled by a TAOC and/or EW/C site use ultrahigh frequency (UHF) radios, which also have LOS limitations. Aircraft can be controlled procedurally if SATCOM or radio relay is available. See MCWP 3-25, Control of Aircraft and Missiles. Mountains provide challenges to logistic operations and terrain presents issues with employing and supporting TAOC and/or EW/C sites. These sites have a large logistic resupply requirement that must be vehicle transported though transportation can be severely limited on unimproved roads. All TAOC equipment, radars, and operations modules require level ground, which is not typically found in compartmentalized terrain, so staffs must plan to have engineers available during set up. In air-to-air operations, positive identification and control is required to successfully support the engagement of fighter aircraft against airborne threats. A TAOC or EW/C site employed in mountainous terrain would not likely be able to execute this mission set, so an airborne radar and controlling agency would be required to take these missions. Overcoming mountainous terrain for the TAOC and/or EW/C site would require smaller, more mobile, self-sustaining ground-based systems that can employ multiple radars over the terrain to cover gaps. Data links currently available in these sites would be used to fuse the air picture by SATCOM.

## Joint/Coalition Theater Command And Control Architecture

Joint and coalition command and control architecture will center on the theater air-ground system. Each Service and coalition member has its own unique contribution to this systemthe MAGTF has the MACCS. The roles and responsibilities of each Service and its respective agencies will vary; however, the senior agency is typically the air operations center. The air operations center may be joint or coalition, depending on the type of operational environment. More information on joint/coalition command and control architecture is available in JP 3-30, Command and Control for Joint Air Operations. The joint theater command and control architecture will not significantly change for operations in mountainous environments.

## Electronic Warfare

The mission of the Marine tactical electronic warfare squadrons (VMAQs) (EA-6B) and other Services' electronic warfare units is to provide electronic warfare support to designated forces. Aviation electronic warfare units conduct tactical jamming to prevent, delay, or disrupt the enemy's ability to use early warning, acquisition, fire or missile control, counterbattery, and battlefield surveillance systems. Tactical jamming also denies/degrades enemy communications capabilities. A more detailed discussion of their capabilities and employment considerations can be found in MCWP 3-40.5, *Electronic Warfare*.

## Weather And Terrain

The EA-6B Prowler is a subsonic, all-weather, carrier-capable aircraft. Weather/terrain affect EA-6B operations by limiting its takeoff and landing options. In mountainous terrain, however, it is necessary for electronic warfare planners to study the terrain carefully to determine how it impacts the effects of enemy radar coverage, communication capability, and friendly electronic warfare assets. This study begins with the intelligence section's IPB, which should be updated as new information becomes available from ground reports and other sources.

## Time On Station

Aircraft TOS is a significant consideration when planning electronic warfare fires, which include antiradiation missiles and radar and/or communications jamming, in any environment. In general, airborne electronic attack assets will be tasked by the combined forces air component commander as a theater asset, which may impact the MAGTF commander's priority for this asset. The Prowler is a combined forces air component commander asset, so it may not be collocated with the MAGTF, which may affect planning or TOS considerations. Airborne electronic attack should be delivered at a critical time against a critical enemy electronic system, such as fire control nets during an enemy attack, air defense systems during friendly offensive air operations, and command and control communications for the control of the movement or commitment of reserves. While these factors apply in any environment, the dispersed nature of mountain operations complicates them. Air officers need to be familiar with electronic warfare capabilities and work with other staff members to ensure communication links or liaisons provide redundant ways to coordinate the proper use of these assets.

## Electronic Attack

Though electronic attack operations should be preplanned, they may be conducted in response to the immediate tactical situation. These unplanned operations are especially difficult because of the centralized control of the asset and the communications challenges associated with mountain operations. Commanders should not count on electronic attack support in the mountains unless they are the main effort and they have put a great deal of planning effort into ensuring that changes at the tactical level will not affect other operations. If commanders choose to use electromagnetic jamming, they must carefully weigh the operational requirement against the rules of engagement, the effects on friendly systems, and the loss of enemy information otherwise gained by SIGINT and/or electronic warfare support. Degradation of some friendly communications may have to be accepted in order to effectively employ jamming. Mountain operations can work to an advantage in that mountains can help electronic warfare units target one area while shielding friendly forces on the other side of the mountain from the effects of the electronic warfare attack. A good IPB that incorporates the enemy electronic order of battle (EOB) is critical to success. More information about amplitude modulation control authority and propagation effects of airborne electronic attack can be found in MCWP 3-40.5.

## Electronic Warfare Support

Intelligence feeds electronic warfare support by making accurate EOB and/or threat characteristics information available in order to accurately program electronic warfare support equipment. Alternatively, electronic warfare support feeds intelligence through electronic warfare support systems that collect information. That information can then be rapidly disseminated as a threat warning or be passed to intelligence production and analysis elements for further processing. Electronic warfare support provides immediate threat recognition and a source of information for immediate decisions involving electronic attack. To best meet immediate tactical requirements, electronic warfare support information used in immediate threat recognition is rapidly disseminated without in-depth processing. Organic to all VMAQs is the technical control and analysis center (TCAC). The mission of the TCAC is to provide semiautomated SIGINT processing, analysis, reporting, and electronic warfare support to the MAGTF. The system correlates the EA-6B mission data with other sources of electronic intelligence, electronic warfare support, and EOB and/or threat characteristics information to provide support to the MAGTF during operations afloat and at FOBs. The resulting product is a comprehensive EOB, which provides intelligence and situational awareness information critical to the mission planning of Marine, joint, and coalition operations. The challenge that the mountains pose to this system is how to push information to the many dispersed FOBs that may need it. The TCAC must aggressively push this information to all elements of the MAGTF and it is the responsibility of the subordinate elements to ensure they plan for redundant means to disseminate this information down to the tactical units that need it. This situation also applies to joint assets.

## Electronic Protect

Electronic protect is the subdivision of electronic warfare and involves actions taken to protect personnel, facilities, and equipment from any effects of friendly or enemy use of the electromagnetic spectrum that degrade, neutralize, or destroy friendly combat capability. Examples include spectrum management, electromagnetic hardening, emission control, and use of wartime reserve modes. There are no special considerations for mountain operations; however, units should use mountains to shield them from the enemy's electronic warfare capability and should consider the EOB and battlefield geometry when establishing communication sites and command posts whenever possible.

## Training Considerations

Mountainous terrain has limited impact to electronic warfare operations. As such, commanders should focus training toward the mission skills that support the Marine Corps tasks for VMAQ. Electronic warfare operations and training should be tailored to the expected threat in the area of interest, whether traditional or nontraditional, rather than the expected terrain. Commanders must consider the effects of terrain as well as the other elements of METT-T in developing their training plans.

## Offensive Air Support

and selection. While higher elevations may benefit fixed-wing aircraft fuel burn and TOS, they negatively affect rotary-wing operations. The thinner air at higher elevations affects rotary-wing power management and can limit the ability to hover in certain conditions, necessitating rolling takeoffs or landings on large, improved surfaces and shallower than normal approach and departure paths.

## Planning Considerations Forward Operating Base And Forward Arming And Refueling Point Locations

While TTP for most offensive air support platforms will remain the same, some platforms, especially rotary-wing aircraft, will experience the following limitations in mountainous environments, especially high mountains, due to altitude restrictions:

 All Marine Corps rotary-wing aircraft are
restricted to less than 3,048 meters (10,000 feet) pressure altitude due to lack of supplemental oxygen systems and pressurized cabins.
 According to Army Regulation 95-1, Flight
Regulations, Army rotary-wing aircraft that are unpressurized may operate to:  3,048 meters (10,000 feet) for up to 1 hour,
after which oxygen is needed.
 3,650 meters (12,000 feet) for up to 30 minutes, after which oxygen is needed.
 4,267 meters (14,000 feet) and above, oxygen must be used.
The FARPs locations in higher altitudes may affect how much fuel or ordnance an aircraft can reload. An aircraft that arms and fuels at lower elevations will provide a different capability than an aircraft arming and fueling at a higher elevation. Planners must be aware that loading up with the same amount of ordnance and fuel may not be possible, which is a significant planning factor when developing supportability timelines as it will affect TOS for all CAS and rotary-wing aircraft. These issues should also be considered when planning FOB and/or FARP locations. Prior coordination with the ACE enable ground forces to extract information about FARP capabilities and limitations prior to FARP emplacement at various FOBs and the required support package needed. Further information on FARP planning and FARP operations is found in MCWP 3-21.1, *Aviation Ground Support*. Aviation III and/or V platoons can be limited on equipment and personnel and can often exceed their operating capacity if too many FARPs are emplaced with too few personnel staffing them. Ground forces may have to assist FARP operations to maintain continuous and close aviation support for certain periods of time.

The LOS challenges associated with communications in a mountainous environment apply to the terminal control of attack aircraft as well. An understanding of communications paths is essential in order to provide timely, effective fires in rugged mountains. Consideration of the usage of other radio relay and digital CAS platforms can greatly enhance communication between the JTAC and/or FAC and attacking aircraft.

## Ordnance Selection Ordnance Versus Fuel

Target type, composition, location, risk estimate distance, and collateral damage estimate will drive ordnance selection. Terrain will also impact ordnance fuzing and/or explosive effects. Planners The more ordnance an aircraft carries, the less fuel can be carried, decreasing TOS. The TOS required by the commander may affect weapons load out must understand how to employ certain aerial weapons in mountainous and snow-covered terrain and the capabilities and limitations of attack aircraft. The terrain and the mission requirements will directly influence the munitions selected and the fuzing used. When employing laser-guided weapons, lower than typical cloud layers and heavy mountain fog can have a negative effect on the ability to laser designate a specific target. Depending on whether the target is located in a cave, on the side of a mountain, or in the middle of a valley, the effects of laser energy should be planned. Risk estimate distances may be reduced by the effects of surrounding terrain, allowing the use of larger munitions in close proximity of friendly forcesa significant advantage in compartmentalized terrain.

## Reduced Power Available

During operations at high altitude, rotary-wing aircraft can experience significantly different flight characteristics than at sea level. The most significant among the differences is a limitation of power available due to the general aerodynamics of rotor systems. Whether these limitations are felt in less lift, reduced tail rotor authority, the inability to recover quickly from a dive, or the reduced ordnance and fuel combinations available to planners, the challenges are significant and must be accurately and continually planned. Planners must update supported units on what they can expect during different times of year and in different environmental conditions of heat, humidity, and altitude.

## Geometry Of Fires

The GCE scheme of maneuver, enemy position, environment, and terrain are all factors when determining attack geometry; however, special attention must be paid to CAS in mountainous terrain, which becomes more significant when integrating fires in a combined arms scenario. Reverse slope, terrain features, type of weapon, aircraft type, and attack profiles are all factors for consideration while employing fires. The terrain may restrict the marking platform, the terminal controller, and/or attacking aircraft's sight to the target. The enemy has a significant advantage in the mountains, because they are in a position to use terrain to effectively counterattack CAS aircraft.

## Weather

Weather conditions in the mountains will have the same effect on aviation assets as they do in flat terrain. Overreliance on aviation assets may render a force susceptible to the uncertainties of weather. Winds, cloud deck, visibility, and temperature must be considered because they can affect the type of supporting CAS aircraft and ordnance employed. Conditions will also affect the accuracy of certain weapon systems as well as the delivery profile of the attacking aircraft. Knowing capabilities of CAS aircraft will help to successfully prosecute targets despite a deteriorating weather condition. Differences in the way CAS aircraft are affected must be understood by planners: fixed-wing aircraft may be unable to see the target or use specific weapons due to quickly materializing cloud layers, while rotarywing aircraft may not have the ability to climb high enough to safely avoid mountainous terrain due to altitude limitations and lack of supplemental oxygen.

## Deep Air Support

Deep air support is not considerably affected by this environment. However, limitations created by weather patterns and winds must be considered.

## Training Considerations

Training requirements are outlined in aircrafts' training and readiness manuals and should be relied upon for the accomplishment of full spectrum missions, to include offensive air support. Continual training and skill refinement is necessary to overcome the difficulties associated with aviation operations in a mountainous and high altitude environment. This environment requires achieving and maintaining a high degree of aircrew proficiency.

## Aviation Ground Support Planning Considerations

could generate enough static electricity to ignite fuel vapors. The storage of ordnance is also a concern. Terrain should be used when possible to satisfy the safe storage of explosives and quantity distance separation requirements. An aviator must certify the FARP using a FARP checklist (see FM 3-04.104) prior to the FARP being available for refuel and rearm.

## Forward Operating Base Locations

An effective aviation ground support deployment capability enables the ACE to establish and maintain a viable expeditionary force. The Marine wing support squadron must be capable of deploying under a variety of conditions and configurations. Considerations for fixed-wing aircraft should be made when operating in a mountainous environment. Normal runway lengths of 2,438 to 3,048 meters (8,000 to 10,000 feet) can be reduced with the addition of arresting gear and the reduction of fuel and ordnance loads.

## Forward Arming And Refueling Points

Airfield size, approach and departure paths, and security for the forward aviation sites are the same for normal operations. If an airfield that can be used by the ACE does not already exist, there are various options available to the ACE to build one. Unimproved surfaces will be engineered to allow for safe continuous flight operations. Varying types of expeditionary airfield systems provide fully portable options that range from individual AM-2 landing pads to a full 8,000-foot runway with taxiways and parking areas. These systems can include tactical air traffic services packages that provide both airfield control and radar guidance as needed. For Marine Corps units, assets and equipment required to build an airfield can require support from all MAGTF elements if needs exceed the capabilities of a Marine wing support squadron. When deployed, these services allow for a safe, all-weather launch and recovery capability.

## Aviation Logistic Support In A Mountainous Environment Planning Considerations

The FARP provides the fuel and ordnance necessary for highly mobile and flexible helicopter, tilt-rotor, and fixed-wing operations. The size of the FARP varies with the mission and the number of aircraft to be serviced. Normally, FARPs are temporary, transitory facilities established for a specific mission and duration. The scope of flight operations in the FARP area should include individual aircraft or aircraft sections or divisions requiring ordnance and refueling. The location and size of the LZ remain the same for mountainous and/or cold environments; however, weather considerations impact FARP operations. Deep snow could cause an aircraft landing gear to sink, greatly reducing the rotor ground clearance and increasing the hazards to personnel operating in and around the FARP.

As with all air operations, planning for mountain warfare should be no different with regard to its aviation logistical support process. Aviation logistic success is based on having a centralized location for the distribution and/or repair of components for its supported dispersed units. These concepts are set forth in MCWP 3-21.2, Aviation Logistics. More maintenance support There are several hazards to consider during aircraft arming and refueling operations in a mountainous environment with snow. A major concern is eliminating sources of ignitions and controlling vapor generation. One of the primary sources of ignition is static electricity. Deep snow retards the grounding of aircraft, which personnel may be necessary, depending on the number of dispersed units in the area of operations, the size of the area of operations, and number of aircraft at each dispersed site. Also, since a limited number of intermediate-level Marine aviation logistics squadron (MALS) Marines are located at a dispersed site, more supplies, equipment, and personnel (all requiring support) are necessary. With the current Marine aviation logistics support program and maritime prepositioning ships, a MALS has the ability to support any type of aircraft composition for the MAGTF ACE. Major planning considerations for these dispersed operations are:

 Availability of intermediate and higher levels
of maintenance and equipment.
 Intermediate-level technicians (National Defense Industries).
 Inspections cycles.  Ground support equipment.  Calibration.  Survey equipment.  Cold weather effects on equipment.
The following problems result from the increased maintenance and continuous operation of equipment at low temperatures and higher altitudes:

 Thickening of oils at low temperatures impairs
starting and operating most equipment. Covers for equipment on aircraft should be used to protect it from the elements. When possible, aircraft should be removed from the elements and maintenance should be conducted in temporary hangar structures.
 Maintenance time factors may increase in areas
of extreme cold.
 Aircraft mechanics are hampered by heavy
winter clothing and gloves. When the tactical situation permits, shelters or warming tents should be provided for personnel performing maintenance. Proper clothing is necessary for all personnel and survival kits tailored to the environment must be carried on all flights.
 Preventive maintenance on all equipment is
more critical in cold weather environments associated with operations in the mountains.
 Parts availability and differing levels of maintenance will vary based on location and distance from the aircraft wing.
 Units may go through far more consumables
because equipment and vehicles may have to be started often or run continuously in order to mitigate the effects of extreme cold weather.
 Resupply must also be planned.

## Material Storage And Handling Considerations

Cold weather and snow has significant effects on all types of supplies. Personnel operating in these conditions must undergo special training to work effectively.

## Effects On Supply Operations From Snow Fall And Snow Cover

Major snowfall and snow cover can significantly reduce a unit's logistic mobility in both improved and unimproved road surfaces when using vehicles not designed or equipped to operate in snowy conditions. Most MALS vehicles are commercially acquired, two-wheel drive, subcompact utility all-terrain vehicles or flat bed commercial trucks that are not well suited for severe weather operations. Tactical vehicles must be assigned or available to transport material, equipment, or personnel. Snow tires, chains, and tow chains should be available and used as needed. Twelve inches of snow normally stops movement of twowheeled commercial vehicles; 36 inches normally stops all wheeled vehicle movement. All-wheel or 4-wheel drive vehicles with low ground pressures are best for moving over snowcovered or muddy terrain.

## Effects On Material And Equipment From Extreme Cold

Extreme cold can significantly slow material handling and maintenance activities by numbing

## Effects On Rubber And Plastics From Extreme Cold

Rubber and plastic gradually stiffen, but retain a large part of their elasticity until reaching extreme cold temperatures, normally below -20 F, at which rubber loses its elasticity and becomes brittle. For example, fuel hoses may crack when allowed to crystallize from cold weather exposure or may break if bent when frozen. Aircraft tires become rigid in cold weather, causing flat spots on parts that come in contact with the ground. In severe cold temperatures, sidewalls become brittle and crack. Every effort should be made to minimize the length of time that material constructed primarily from rubber and plastic is exposed to extreme cold temperatures.

## Training Considerations

exposed skin, such as the face and hands. Activities that normally require only minutes in temperate weather may require hours in extreme cold. Movement by foot or vehicle over snowy and icy surfaces is slower and poses a high risk of injury to personnel and damage to equipment. Subfreezing temperatures result in freezing water in water tanks, waterlines, and equipment exposed to snow and water penetration. Because water expands when frozen and metals and plastics become brittle in subzero temperatures, standing water in equipment may freeze and damage components in areas with close tolerances and no room to expand. Additionally, metals contract at lower temperatures and expand at higher temperatures. Consideration must be given to guard components and equipment against improper clearances that can lead to binding or excessive looseness when exposed to subfreezing temperatures. Commanders and logisticians must make every effort to winterize vehicles and equipment with cold weather lubricants and antifreeze liquids. Equipment should be kept free of snow and water to prevent the effects of freezing water by keeping equipment running or placing impermeable covers on it when in storage or not in use. Material handling and storage personnel should be provided with suitable head gear and gloves to minimize the effects of severe cold weather.

## Effects On Metals From Extreme Cold

Maintenance and logistical personnel must train for this environment and plan for additional requirements before deploying to mountainous regions. The most effective training program includes hands on and real time environmental and survival training for the individual Marine followed by supporting actual aircraft in the environment to which they will deploy. Marines must understand all the factors affecting the aircraft, tools, equipment, vehicles, support gear, and themselves in order to keep airplanes flying. The MALS Marines will likely be responsible for their own force protection and security when operating in remote regions while supporting aviation operations. Training for this mission should include fire team and squad tactics and an understanding of quick reaction forces and supporting fires from higher headquarters. Communications equipment, weapons, and ammunition tailored to the operating area will be required.

Metals become brittle and subject to failure in severe cold temperatures. Storage, handling, and use of equipment that contains dissimilar metals that are bolted together or are in constant friction are most at risk for failure during transportation, handling, or when placed into operation following long periods of exposure to subfreezing temperatures. In cold weather, special care should be taken to protect equipment from excessive shock, so mechanical components should be allowed to slowly warm up before being started.

To be truly effective in mountain warfare, the MAGTF and BCT must understand the limitations imposed by the effects of this environment on the fighting ground force and aviation elements. While the terrain, altitude, and weather impact certain operations, the basic tenets of military aviation support the mission of the Marine regardless of the location in which he/she is fighting. The inherent skills and knowledge of ACE operators ensures the successful integration between ACE units in support of the MAGTF or BCT commander's overall mission. Since successful planning will result in the mitigated effects of high altitude and extreme weather, ACE planners should be used extensively to ensure that support for the Marine is being sourced appropriately.

## Chapter 8 Fires Organization For Artillery

To mitigate some of the limitations in the mountains and in order to better support isolated maneuver units, the artillery battery can be broken down into smaller platoons than what is called for in the unit's TOE. This organization does allow support of maneuver units across vast distances, but it strains its personnel and equipment. Despite these constraints, these smaller gun platoons can operate independent of the battery, while retaining the capability to mass fires as a battery depending on the distance. Platoons can also operate from FOBs or COPs in support of missions, but ammunition could be limited due to logistic requirements.

Combat operations in mountainous areas are characterized by many of the same challenges found in cold regionsrugged, compartmented terrain with steep slopes and treacherous mobility; however, mountain weather may range from extreme cold with ice and snow in winter to extreme heat in some areas during the summer. Extreme terrain and weather can pose significant problems and are important planning considerations for both maneuver and fire support operations. Since, in many cases, the terrain favors the defender who tries to control the heights, offensive operations are usually battles for this key terrain or the chokepoints they control in the valleys. Consequently, dismounted infantry and airmobile operations are most suitable for this type of terrain, especially if they are properly supported by fires. For example, it is important to position mortars and artillery in defilade to increase their survivability; yet, such terrain is often subject to snowslides, rockslides, or avalanches, which can fall on their positions with devastating results. Intelligence estimates should identify defilade positions that pose the least amount of risk of such hazards.

Although the use of smaller gun platoons may effectively support the commander in a dispersed environment, such dispersal complicates his/her ability to mass fires, lead, and sustain each platoon. He/She must depend on officers and senior and junior NCOs capable of operating independently and sometimes performing duties above their TOE rank structure. The requirement for specialized logistics, security, communications, computers, and vehicles for each platoon position may require a significant increase in personnel, exceeding a battery's authorized TOE. As a result, proper allocation of resources based on predeployment mission planning is essential.

Of course, these same types of positions are sought by enemy units and that is why observed indirect fires are so crucial to success in this environment. Indirect fires can impede the enemy's mobility or destroy positions, giving maneuver elements time to close with and destroy the enemy. While the basic tactical principles for artillery remain valid in mountains, they are subject to the limitations imposed by the terrain and weather addressed in this chapter. Unless otherwise noted, the principles outlined in this chapter apply to mortars as well as artillery.

The structure of the artillery battalions will dictate how they can be divided into two-gun platoons. For example, heavy BCTs and infantry BCTs have a fires battalion with two, eight-gun batteries, while Stryker BCTs have three, six-gun batteries. Currently, artillery TOEs do not support two-gun platoons from the standpoint of fire direction center (FDC) communications equipment, computers, or personnel. To meet this challenge, units may have to either cross-train personnel and request additional equipment or operate with reduced personnel at all FDCs and divert communications and computers from other sections. Such a plan detracts from mission accomplishment by the sections from which the equipment and/or personnel are taken.

limited to traveling on the existing road and trail networks and positioning in their immediate vicinity. Air movement of towed field artillery is possible with fixed- or rotary-wing aircraft; therefore, gun crews should be proficient using equipment-rigging techniques and air assault procedures and should possess ample sling-load equipment. Field artillery emplaced by helicopter normally requires continued airlift for subsequent displacement and ammunition resupply and often necessitates substantial engineer support.

## Movement And Positioning Air Movement Reconnaissance, Selection, And Occupation Of A Position

Towed field artillery may require forward displacement of gun sections by helicopter to provide forward troops the necessary support. Additionally, this provision requires Marine Corps HSTs to facilitate a battery's firing capability using air movement operations.

## Position Selection

Normally, field artillery is employed far enough to the rear to take advantage of increased angles of fall. Flat areas, such as dry riverbeds, villages and/or towns, and farmland, can usually accommodate firing units; however, these positions present particular problems in the mountains for the following reasons:

 Dry riverbeds are hazardous because of the
danger of flash flooding.
 Towns and villages usually have adequate flat
areas, such as parks, schoolyards, and playing fields, but they are relatively scarce and often easily targeted by the enemy.
The reconnaissance (the examination of the terrain to determine its suitability for use in accomplishing the mission), selection, and occupation of a position are critical to mission accomplishment. Rugged terrain and reduced mobility increase the reliance on field artillery fire support; however, the employment and positioning of field artillery systems may be severely impacted by the extreme difficulty of ground mobility in mountainous terrain. The battery leadership must analyze the routes to be used by the unit assets and the time and distance required to make the move. The ability to move one firing platoon while keeping a second platoon fire capable is critical to platoonbased operations in support of dispersed maneuver units. Moving the battery over long, difficult routes requires well planned, coordinated movement orders and unit standing operating procedures (see MCWP 3-16.3, Tactics, Techniques, and Procedures for the Field Artillery Cannon Battery). Clearance of near and intervening crests is always a factor in selecting firing positions.

## Movement

 Farmland is often difficult to negotiate from
spring to fall. In the winter, if the ground is frozen, farmland may provide good firing positions; however, frozen ground may cause difficulty emplacing spades, base plates, and trails.
Consequently, good artillery positions that have been selected for cover, flash defilade, and accessibility to road nets and LZs are difficult to The effects of the weather on the terrain to be crossed must be analyzed to facilitate rapid movement. Weather affects visibility (fog, haze) and trafficability (ice, rain-softened ground). Ground movement of field artillery is often find and their relative scarcity makes it easier for the enemy to target probable locations. Commanders must ensure that positions on dominant terrain provide adequate defilade. Positions on commanding terrain are preferable to low ground positions because there is
launcher firing point and are measured and input to the launcher fire control system by individual section chiefs. Downrange masks are beyond 1,981 meters (6,500 feet) and are measured and input into the advanced field artillery tactical data system's fire direction system by the platoon leader and/or battery operations officer in accordance with unit operating procedures.

 A reduced number of missions requiring highangle fires.
 A reduced amount of dead space in the target
area.
 Less exposure to small arms fire from surrounding heights.
 Less chance of being struck by rockslides or
avalanches.
Downrange masks are measured and applied using crest clearance tables and automated downrange mask checks. Both M270A1- and M142-equipped units in mountainous terrain must be familiar with these tables, which allow leaders to establish minimum planning ranges beyond a crest for launchers in a specific firing area. Proper use of these tables will ensure rockets will clear the crest and not detonate prematurely. It will also help to identify the dead space that must be covered by other indirect fire weapons, such as mortars, or by aviation or direct fire weapons placed behind the intervening slopes.

## Acquisition And Observation Radar Considerations

Some weapons may be moved forward to provide long-range interdiction fires or, in extreme cases, direct fires to engage a road-bound enemy in mountain passes or along valley floors. Because of rugged terrain, higher angles of fire, and reduced ranges, it is generally necessary to displace artillery more frequently in mountains than on level terrain to provide continuous support. Additionally, even when maneuver units are not dispersed, artillery commanders may often be forced to employ field artillery in a decentralized manner or disperse it in multiple locations in the same general area because of the limited space for gun positions. Security must be provided for each gun location.

## Multiple Launch Rocket System M270A1 And High Mobility Artillery Rocket System M142 Position Considerations

Because of high-angle fire requirements, radar can be effective against enemy indirect fire systems if properly emplaced; however, terrain masking can diminish the radar's LOS and degrade its effectiveness if it is not properly emplaced. Sites should be selected on prominent terrain to obtain the lowest possible screening crest, but it is often difficult to obtain a low and consistent screening crest in mountainous terrain. Too low a screening crest drives the search beam into the ground; too high a screening crest allows the enemy to fire under the beam and avoid detection. In mountainous terrain, selecting general position areas to take full advantage of the radar range and capabilities is difficult. Helicopter assists are often required to move radar teams to While mountains can mask all types of firing units, they present special challenges and limitations to rocket-fired munitions. Dead space is the area that is masked behind a crest and cannot be attacked by rockets from particular firing positions. Masks are terrain features that have enough altitude to potentially interfere with the trajectory of the rocket or missile. There are two categories of masksimmediate and downrange. Immediate masks are within 1,981 meters (6,500 feet) of a optimal locations. Very often the positions that provide the best LOS for acquisition provide the least concealment and survivability, so proper camouflage techniques are critical for survival. Additionally, the heavy rain and snow often found in the mountains can degrade the capabilities of radar by decreasing the probability of location (see MCRP 3-16.1A, Tactics, Techniques, and Procedures for Field Artillery Target Acquisition, for additional information on radar positioning). When positioning weapons-locating radars, commanders should also consider the following:

 Although time consuming to create, visibility
diagrams are extremely useful in determining the probability of acquiring targets within the radar's search sectors.
 To limit search areas, radars should focus on
terrain that can be occupied by artillery and mortars.
 Accurate survey control is essential because of
the extreme elevation variations in mountainous terrain. Helicopters may be useful in performing survey by use of the Position and Azimuth Determining System. If possible, digital radar maps may be used to minimize the time required for height correction of the weapon system. Digital maps allow the Firefinder systems to initially locate weapon systems to within 250 meters (820 feet), which enables the radar operator to make only few visual elevation adjustments to accurately locate the weapon system.
 Prediction is computed at the radar's elevation;
therefore, excessive errors in the prediction can be expected.
 Radars in the same area that face one another
and radiate at the same time can cause interference and emissions burnout, resulting in equipment failure. If radars must face one another to accomplish the mission, commanders must coordinate with each other to ensure that they do not radiate at the same time.
 Computing track volume may become a critical
task in determining the radar's effectiveness for a proposed position (see MCRP 3-16.1A for computations).
 Units will need to rely more on shelling reports
to determine enemy firing locations, so predeployment training must ensure all units meet minimum standards for this skill.

## Observer Considerations

High-angle fire is used for firing into or out of deep defilade, such as that found in heavily wooded, mountainous, and urban areas. It is also used to fire over high terrain features near friendly troops. The observer may request high-angle fire based on terrain analysis in the target area. The fire direction officer may also order high-angle fire on the basis of a terrain analysis from the firing unit position to the target area. The primary characteristic of high-angle fire is that an increase in elevation causes a decrease in range. Because high-angle fire involves large quadrant elevations and long times of flight, it will not be as responsive as low-angle fire to the immediate needs of a maneuver force. In addition, trajectories will also be more vulnerable to enemy detection. The long time of flight and the steep terrain make it difficult for the observer to identify his/ her round. Corrections may change drastically from round to round because spotting rounds often get lost in defilade positions. To help the observer, FDC personnel announce the time of flight in the message to observer and SPLASH 5 seconds before each round impacts (see MCWP 3-16.4, Tactics, Techniques and Procedures for the Field Artillery Manual Cannon Gunnery).

Note: SPLASH is a proword transmitted to
the observer 5 seconds before the estimated
impact of a volley or round of artillery, mor-
tar, or naval gun-fire.

To prevent fratricide, noncombatant casualties,
and destruction of civilian property and infra-
structure, field artillery fires in mountains will be

observed, especially close support and defensive fires. Unobserved fires are generally more unreliable in mountains because of poor maps, rapidly changing MET conditions and elevation changes. A good FDC can overcome some of the challenges of weather and high-angle fires through training and by capturing timely and accurate MET data. Elevated points, such as crests and trees, are often used for observation posts. Landmarks and prominent terrain features should be avoided as these are probably targeted. When selecting an observation post, the observer must consider the characteristics of forward slope (military crest) versus reverse slope positioning. Advantages of the forward slope position include

 The view of the front and flanks is better.  Fires impacting on the topographic crest will
not neutralize the position.
 The hillside provides background, which aids
in concealment.
Low clouds or fog may require moving the observation post to preplanned emplacements at lower elevations. Observers must be prepared to perform assault climbing to reach the most advantageous observation site. Commanders may use aerial observers or UASs to detect long-range targets and complement forward observers by adjusting fires beyond terrain masks, in deep defilade, and on reverse slopes. Commanders may also consider the use of long-range telescopic cameras for use in observation; however, in extremely high mountains, air observers may be confined to valleys and lower altitudes due to altitude limitations on different types of aircraft. Observing fires in mountains is difficult because the area being observed is three dimensional relative to other types of terrain. As such, the observer may encounter increased difficulties in determining accurate target location (to include altitude). Additionally, subsequent corrections may appear more exaggerated, particularly as angle T increases. In most cases, increased accuracy comes with experience and training gained from operating in mountains before deployments.

Disadvantages of the forward slope position are as follows:

## Use Of Laser Range Finders And Laser Designators For Laser-Guided Munitions

 Difficulty in occupying during daytime without disclosing the position.
 Radio communications may be difficult and
require remoting radios to the reverse slope.
 Cover from direct fire may not be available.
The advantages of a reverse slope position are

 It may be occupied in daylight.  Greater freedom of movement is possible.  Communications
installation,
maintenance,
and concealment are easier.
 Protection from direct fire is available.
Disadvantages of the reverse slope position are

 The field of view to the front is limited.  Enemy fire adjusted onto the topographic crest
may neutralize the observation post.
Use of laser range finders and laser-guided weapons in the mountains also demands increased emphasis on training and observation techniques. Laser target ranging and designation systems help to overcome difficulties in range estimation by providing accurate directional distance and vertical angle information for use in locating enemy targets; however, when using a laser designator, an observer should consider LOS with the target and cloud height. While laser-guided munitions (artillery, mortar, or air delivered) self-correct in flight, the ability to correct the trajectory is based upon the seeker head acquiring the target in sufficient time to make the correction. Cloud ceilings that are too low will not allow laser-guided munitions enough time to lock on and maneuver to the target. Global Positioning System (GPS)-aided munitions can overcome this limitation as they do not rely on reflected laser energy.

## Survey And Meteorology Meteorological Message Space And Time Validity Survey In Mountains

The accuracy of a MET message may decrease as the distance and time from the MET sounding site increases. Local topography has a pronounced effect on the distance that MET data can be reasonably extended. In mountainous terrain, distinct variations of wind and temperatures occur over short distances. Normally, MET messages for artillery are considered valid up to 20 kilometers (about 12 miles) from the balloon release point; however, the validity distance decreases proportionally with the roughness of the terrain. As a result, MET messages for artillery are only considered valid up to 10 kilometers (about 6 miles) from the balloon release point in mountainous terrain, which can lead to increased targeting error and should be considered when firing in close proximity to friendly or civilian positions in mountains.

Survey operations are always critical and those in mountainous environments are no exception; however, there may be times in the mountains when normal survey operations are not possible due to the terrain, electrical interference, limited equipment, or equipment failure. When these hindrances occur, units can use the trigonometric functions to compute a traverse method or the triangulation methods that are explained in MCWP 3-16.7, Marine Artillery Survey Operations. The triangulation method is ideally suited for rough mountainous terrain when other methods are impractical. It employs oblique triangular figures and enables the surveyor to cross obstacles and long distances. While this method is time consuming and requires careful planning and extensive reconnaissance, it is nonetheless effective and can help ensure accurate fires even in the mountains.

## Targeting Global Positioning System Limitations And Considerations

Because of the decentralized nature of mountain operations, targets warranting massed fires may be fewer than those in open terrain; however, narrow defiles used as routes of supply, advance, or withdrawal by the enemy are potentially high payoff targets for interdiction fires or large massed fires. Large masses of snow or rocks above enemy positions and along MSRs are also good targets because they can be converted into highly destructive rockslides and avalanches that may deny the enemy the use of roads and trails and destroy elements in defilade. In the mountains, suppression of enemy air defenses takes on added importance because of the increased dependence on all types of aircraft. Commanders and their staffs should carefully review MCWP 3-16, Fire Support Coordination in the Global Positioning System receivers rely on electronic LOS with satellites. Initially, they search and select satellites that are 10 degrees or more above the true horizon. Mountains, mountain forests, or deep canyons may mask the signal. If usable satellites cannot be detected, operators may have to move to higher ground to get better LOS to the satellites and use more traditional techniques in order to survey firing positions. Additionally, the operating temperature of the GPS is -4 F to +158 F. Many mountain temperatures are much colder, so the GPS receivers must be protected by carrying them inside one's clothing or in a heated vehicle and using an auxiliary antenna system.

## High Explosive Munitions

High explosive munitions include point-detonating fuzes, variable/electronic time fuzes, mechanical time super quick (MTSQ) fuzes, and mechanical time-only fuzes.

Ground Combat Element, for a clear understanding of the targeting methodology. Such knowledge and that of the capabilities and limitations of target acquisition and attack systems in a mountainous environment is crucial to the synchronization of all available combat power. To provide accurate and timely delivery of artillery fires in mountainous terrain, commanders must consider the following:

 High angles of elevation and increased time of
flight for rounds to impact.
 Targets on reverse slopes, which are more difficult to engage than targets on flat ground or rising slopes and require more ammunition for the same coverage.
 Increased amounts of dead space unreachable
by artillery fires.
Impact fuze, high explosive shells are very effective on rocky ground, scattering stones and splintering rocks, which themselves become missiles. However, deep snow that is often found in high mountains during the winter months reduces their bursting radius, making them approximately 40 percent less effective. Also, the rugged nature of the terrain may afford added protection for defending forces; therefore, larger quantities of high explosives may be required to achieve the same desired effects against enemy defensive positions than in other types of terrain.

 Intervening crests that require detailed map
analysis.
When the five requirements for accurate predicted fire (target location and size, firing unit location, weapons and ammunition information, MET information, and computational procedures) are not achievable, registration on numerous checkpoints becomes essential because of the large variance in elevation (see MCWP 3-16.4 for more detailed information).

## Munitions

Variable time or electronic time fuzes should be used in deep snow conditions and are particularly effective against troops on reverse slopes. The MTSQ fuzes are typically not used in high-angle, high explosive fire due to an increased height of burst probable error. There are some older MTSQ fuzes (M564 and M548) that may prematurely detonate when fired during times of precipitation. Base ejection rounds (such as illumination) using mechanical time-only fuzes are less affected by height of burst probable errors than are high explosive rounds fuzed with MTSQ fuzes. For example, if a high explosive projectile armed with a variable time fuze and set with a time less than the minimum safe time is to be fired over marshy or wet terrain, water, ice, or snow, then the average height of burst will increase. The vertical clearance must be significantly increased (see MCWP 3-16.4 and MCWP 3-16.3).

## Smoke And Obscurants

Terrain and weather also affect the use of field artillery munitions. When evaluating the use of lethal or nonlethal fires, commanders must carefully weigh the operational requirements against the rules of engagement. Considerations for mountain employment of high explosive munitions, smoke and obscurants, high-angle fire, and thermobaric weapons are discussed in the following subparagraphs.

Smoke operations in mountainous areas are challenging due to the terrain and wind. Inadequate

## Thermobaric Weapons

Thermobaric weapons are useful in mountainous environments due to their destructive capability when employed against tunnels, caves, and isolated terrain compartments. The shockwave and overpressure created by these weapons create casualties in confined spaces. This effect is ideal if units are tasked with clearing confined areas, such as caves. Thermobaric weapons have been used in the cave networks of Afghanistan with positive results. In the past, clearing cave networks has caused numerous casualties, so commanders and their staffs should consider these weapons for this type of mission. These weapons are restricted due to their destructive capabilities and they require extensive planning time to acquire release authority from higher echelons.

## Mortars

roads enhance the military value of existing roads, mountain valleys, and passes and add importance to the high ground that dominates the other terrain. Planners can use smoke and flame systems to deny the enemy observation of friendly positions, supply routes, and entrenchments and degrade their ability to cross through tight, high passes to engage friendly forces with direct and indirect fires. White phosphorous should be used cautiously in snow cover. Pieces of white phosphorous may burn for up to four days if covered by snow as it ignites only after being exposed to air. Thermally-induced slope winds that occur throughout the day and night increase the difficulty of establishing and maintaining smoke operations, except in medium- to large-sized valleys. Wind currents, eddies, and turbulence in mountainous terrain must be continuously studied and observed. Forward observers who understand these local weather patterns can skillfully exploit them and enhance smoke operations rather than have them deterred by the weather. Smoke screens may be of limited use due to enemy air observation, to include UASs, and observation by enemy forces located on high ground.

## High-Angle Fire

Mortars are essential during mountain operations. Their high angle of fire and high rate of fire are suited to supporting dispersed forces. Mortars can deliver fires on reverse slopes, into dead space, and over intermediate crests. Like field artillery, rock fragments caused by the impact of mortar rounds may cause additional casualties or damage. Suitable mortar firing positions can still be a challenge to find, but are often easier to find than artillery positions. By design, mortars must be emplaced closer to the supported unit than artillery due to their limited maximum range.

High-angle trajectory, often required in mountainous environments, has two inherent characteristics that affect munitions selectiona steep angle of fall and a large height of burst probable error for MTSQ fuzes. The steep angle of fall means the projectile is almost vertical as it approaches the ground. When the high explosive projectile bursts, the side spray contains most of the fragmentation. Since the projectile is nearly vertical, side spray occurs in all directions and is nearly parallel to the ground; hence, high explosive shells with quick fuzes or variable time fuzes are very effective when fired at high angles. On the contrary, large probable error in height of burst makes the use of mechanical time fuzes impractical in high-angle fire.

Mortars come in three different configurations 60 mm, 81 mm, or 120 mm. The 60-mm mortars are usually carried on dismounted movements due to their light weight and mobility. Mortars provide smaller units with an organic fires capability when conducting independent operations and can be used to pin down an enemy, to escape from an ambush, to maneuver on the enemy, or to allow time for other firing assets to acquire the target. While it is possible to carry 81-mm and
120-mm mortars on dismounted movements, it is not desirable to do so in rugged mountainous terrain. The increased weight of the 81-mm and 120-mm mortar rounds severely hampers movement that is already slow due to the constraints of the mountainous environment. Planners must consider that small units will also be forced to sacrifice carrying other heavier items, such as Javelins, AT4s, additional ammunition for crewserved weapons, and fewer mortar rounds if they carry larger mortar systems. If possible, larger mortar systems should be placed at COPs or FOBs for use, which is often the only way to ensure there are tactically significant quantities of ammunition available.

mobility is also restricted by terrain. The forward air controllers (airborne) (FACs[A]) and CAS pilots can be used as valuable sources of information and can find and designate targets that may be masked from direct ground observation. Vehicles and personnel are particularly vulnerable to effective air attack when moving along narrow mountain roads. Precision-guided munitions, such as laser-guided bombs, can quickly destroy bridges and tunnels and, under proper conditions, cause landslides and avalanches that close routes or collapse on both stationary and advancing enemy forces. Precision-guided munitions and fuel-air explosives can also destroy or neutralize well-protected point targets, such as cave entrances and enemy forces in defilade.

During movement to contact or other offensive operations, larger mortars should be transported along valley roads and trails to provide continuous fire support coverage to the lighter dismounted units in the higher rugged terrain. Continuous coverage can be achieved by splitting units into sections and conducting bounding techniques to ensure at least one section is always ready to fire. See MCWP 3-15.2, Tactical Employment of Mortars, for additional information on employing mortars in mountainous environments.

## Air Support

Low ceilings, fog, and storms common to mountain regions may degrade air support operations. Despite these challenges, GPS-capable aircraft and air-delivered weapons can negate many of the previous limitations caused by weather. Terrain canalizes low-altitude air avenues of approach, which limits ingress and egress routes and available attack options and increases aircraft vulnerability to enemy air defense systems. Potential targets can hide in the crevices of cliffs, the niches of mountain slopes, and on gorge floors; hence, pilots may be able to detect the enemy only at short distances, requiring pilots to swing around for a second run on the target and giving the enemy more time to disperse and seek better cover. Additionally, accuracy may be degraded due to the need for pilots to divert more of their attention to flying while executing their attack.

Because the terrain compels the enemy to concentrate their forces along roads, valleys, reverse slopes, and deep defilades, CAS is very effective; however, the terrain restricts the attack direction of the CAS strikes. The enemy also conducts an IPB to determine the likely direction of the CAS strikes and will weight their air defenses along those routes. The fire support officer must aggressively identify the enemy air defense systems and target them to enhance the survivability of the CAS assets.

Planning considerations for CAS and close combat attack (CCA) are discussed in MCRP 3-16.6A, JFIRE Multi-Service Tactics, Techniques, and Procedures for the Joint Application of Firepower. While CAS is a joint concept, CCA is used exclusively by the Army and is defined as a coordinated attack against targets that are in close proximity to friendly forces.

Air interdiction and CAS operations can be particularly effective in mountains, since enemy While CAS and CCA are similar, there are differences to explore. The first is the two manners in which support is requested: CAS is requested in a standardized 9-line format, while CCA is reported according to a 5-line format. Second, CCA enables aircrews, having received the brief from ground forces, to retain the freedom to maneuver as needed to engage targets. Third, due to enhanced situational awareness from aircrews, positive terminal control from the ground forces or certified controllers are not required. Both methods should consider the joint nature of the contemporary operational environment. In mountainous terrain, the use of a CCA enables ground forces to provide information on the engagement to Army attack reconnaissance helicopters without limiting the direction of engagement, which allows aircrews to use the canalizing terrain and select more advantageous attack methods to destroy enemy targets. In addition, CAS is requested by using FACs or JTAC. Both are certified Service members who, from a forward position, direct the action of combat aircraft engaged in CAS and other offensive air operations. A FAC(A) is a specifically-trained and qualified aviation officer who exercises control from the air of aircraft and indirect fires engaged in CAS of ground troops. According to MCRP 3-16.6A, a certified and qualified JTAC or FAC(A) will be recognized across DOD as capable and authorized to perform terminal attack control. A joint fires observer is a certified and qualified Service member who can request, adjust, and control surface-to-surface fires; provide targeting information in support of type 2 and type 3 CAS terminal attack controls; and perform autonomous terminal guidance operations in accordance with MCRP 3-16.6A and JP 3-09.3, Close Air Support. While not as highly trained as a JTAC, FAC, or FAC(A), more individuals can be trained as a joint fires observer. The joint fires observer adds warfighting capability, but does not circumvent or nullify the need for a qualified JTAC, FAC, or FAC(A) during CAS operations. With JTACs, joint fires observers assist ground commanders with the timely synchronization and responsive execution of all joint fires and effects at the tactical level.

## Naval Surface Fires

As demonstrated in the Pacific Campaign of World War II, naval surface fires can be employed in mountainous terrain; however, the opportunity to use such fires is limited. The issues of trajectory and intervening crests along the gun-target line often make its employment difficult in mountainous terrain. Conventional naval surface fires typically have a low angle of fire and a flat trajectory. Though the position of the naval vessel in relation to the target will determine the gun-target line and the accessibility of the target by conventional naval surface fires, operational level planners should not forget the capability that naval-launched, precision-guided munitions can bring to the battlefield. Cruise missiles launched from naval vessels can engage targets deep inland with devastating accuracy and are not subject to the same limitations as conventional naval fires.

## Nonlethal Fires

Nonlethal fires are an important part of any arsenal and can be effective across the range of military operations in mountainous environments. As with lethal fires, the desired effects of nonlethal fires can be limited by the terrain due to mobility restrictions and the fact that physical geographic features can create sub-environments where the same nonlethal fires may have entirely different effects. Marines must be creative and utilize other nonlethal capabilities when interaction with the local populace is hindered by terrain or weather.

## Information Operations

Information operations are defined as the integration, coordination, and synchronization of all conducts fire support coordination at the battalion level and higher. The distances and dispersed nature of the fight in mountainous environments often requires smaller units to control and clear fires within their areas of operations and companies to receive some of the same equipment and personnel that is normally only found in battalion and larger organizations. Recommended methods to achieve this organization are to

 Establish clear boundaries and simple direct
fire control measures.
actions taken in the information environment to affect a target audience's behavior in order to create an operational advantage for the commander. In many cases, traditional information-related capabilities, such as print and broadcast media, will prove less effective in the execution of information operations because many mountain communities have low literacy rates and do not have access to modern communication technologies. Personnel who engage in information operations can overcome such challenges by offering low technology solutions, such as the distribution of hand-cranked radios.

 Establish appropriate fire support coordination
measures.

## Deception

 Recommend appropriate airspace coordinating
measures.

## Artillery Logistics

Deception is a capability in the form of a planning process that focuses actions to deliberately mislead adversary military decisionmakers (or target audiences) as to friendly military capabilities, intentions, and operations with the intent of enticing or inciting a specific behavior in the battlespace that will provide the commander or MAGTF an operational advantage. One example is the use of mock radar systems in addition to the actual radar system. This deception prevents the enemy from knowing the actual location of friendly radar systems and, most importantly, from knowing the direction of radar observation.

Artillery requires a substantial logistic effort to supply and maintain itself on the battlefield. Mountainous terrain requires that artillery perform many high-angle missions and missions using propellant charges at maximum capability. Such artillery use causes premature failure of the howitzers and an increased maintenance effort to remain mission capable. In a mountainous environment, logistic support becomes very difficult and requires unique solutions due to the terrain limitations.

## Fire Support Coordination Measures

The information contained in MCRP 3-16.6A is applicable to any environment; however, the mountains often necessitate changes to standing operating procedures. The Marine Corps normally Helium and nitrogen management is vital in mountainous terrain. Helium is used by MET teams to gather updated weather data for firing units. Meteorological support can only extend up to 10 kilometers (about 6 miles) from the release point in mountainous terrain. In order to provide The radio in a box is a 250-watt personal radio powered by a hand crank. The advantage to this system is that it is not technologically complicated and is easily used by the listener. The employment of a radio in a box was considered to be one of the most effective means of communicating with the local population in Afghanistan because the local population has an adult illiteracy rate of more than 70 percent.

detail in chapter 6 of this publication or in MCRP 3-35.1D for the effects of cold weather on artillery ammunition.

accurate MET support throughout the battlefield, the MET teams and their helium must be positioned and frequently resupplied in numerous locations across vast distances. As a result, logistical resupply of helium becomes more important and more difficult in mountainous terrain. Similarly, nitrogen resupply is essential in maintaining firing capability among artillery units. The amount of nitrogen used in howitzer recoil systems, how much is on hand in a given country, where it is located, and how to transport it to the area of operations are all logistical considerations when managing artillery operations in this environment.

Fires are one of the strongest enablers for commanders and planners in mountainous environments. Effective use of lethal fires helps compensate for the long ranges and large amount of dead space that is found in mountainous environments. Commanders can, if necessary, break down batteries from their traditional modified TOE with proper preparation and training. There will be a heavy reliance on air support. Commanders and planners should train all personnel on CAS procedures and, if possible, train unit personnel to become joint fires observers. Effective nonlethal fires and information operations will build good will with the public and facilitate operations of all types in the mountainous environment.

Energy management and ammunition management are also other important issues of consideration for the artillery community in mountain operations. Many of these issues are covered in

## Chapter 9 Communications Planning Considerations Requirements Identification

The MAGTFs are rarely employed independently; they are likely operating within a larger force or coalition. Every effort should be made to maintain the integrity of these organizations to maximize their inherent synergies, such as their robust joint, interoperable communication network that enables operational adaptability of command and control system capabilities. The mountainous environment poses unique challenges when trying to employ communications equipment. The following are communications planning considerations:

 Widely distributed units, such as companies
and platoons, will require the same communications capabilities and decisionmaking authorities that are traditionally found at battalion or higher levels.

Each organization has its own unique require-
ments for command and control. The mission,
area of operations, terrain, and weather will dic-
tate the radio nets, local area networks, and spe-
cial purpose systems required. Expeditionary
units coming from the sea will initially rely heav-
ily on long haul, wideband communications until
command and control transitions ashore. Once
ashore, networks will expand as more units and
capabilities are added. Units expand their com-
mand and control network from one that relies
primarily on tactical radios to one that consists of
a combination of radios and local area networks.
A fully implemented command and control archi-
tecture integrates four different types of commu-
nications and information networks known as the
tactical data network. See table 9-1on page 9-2
for communications planning requirements.

## Communications Systems Comparison

 Units must develop core communications competencies with a variety of communications equipment and/or systems down to the lowest
echelons of command possible.
 Commands must develop the leadership and
decisionmaking skills of junior leaders.

Eleven methods of communications are avail-
able for use. The following subparagraphs and
table 9-2, on page 9-3, discuss the advantages
and limitations of each.

 Command and control architectures require
redundancy and must account for the effects of the operational environment.

## Single-Channel Radio

 Installation time of communication nodes in
mountainous areas can double, depending on the terrain and the weather.

The SCR equipment includes radios that operate in
the UHF tactical satellite (TACSAT), UHF, HF,
and VHF bands that can provide secure voice and
limited data communications capability (transfer
rates are limited by bandwidth constraints).

 Command and control plans for communications nodes should accommodate expansion as more equipment and personnel arrive and more capability is required.
 The communications priority should be singlechannel radio (SCR) and SATCOM, since they will be the primary command and control links for headquarters.

Retransmission of tactical communications is one
of the most effective means of mitigating the defi-
ciencies of VHF and UHF communications. As a
result, retransmission requires focused and detailed

planning. The following are planning considerations for employing retransmission teams:

 Survivability of retransmission teams relies on
operations security, the proper use of cover and concealment, light and noise discipline, and planned mutual support due to their exposure to enemy and environmental threats.
 Teams should be emplaced at night and just
before operations to help protect them from
compromise and attack.
 Logistical requirements, such as batteries,
food, water, and all relevant classes of supply,
should be anticipated.
 Mobile retransmission sites should be identified, reconnoitered, and validated prior to execution of operations when the operational environment allows it.
 Airborne retransmission and relay of critical
nets help to overcome many of the challenges
associated with ground retransmission; however, they can only be relied upon for shortduration missions (some UASs can provide extended periods of coverage).
 Specially configured rotary- and fixed-wing
aircraft can serve as robust command and control platforms.

## High Frequency

Though HF communications support long-range communications, they work best when stationary and require more training than VHF or UHF radios. Newer HF radios, such as the PRC-150, TRC-209, or vehicle-mounted MRC-148 and VRC-104, use the third general automatic link establishment. They are a suitable stationary alternative to TACSAT radios, but often take longer to set up and are not as effective on the move.

## Very High Frequency

The VHF radios are greatly affected by terrain masking and are limited to near-LOS employment in mountainous terrain. An LOS study should be conducted as part of the IPB in order to maximize the potential of VHF communications.

Planning Requirements.
#
Communications Planning Requirements
1
Identify critical communications nodes and support
requirements based on an analysis of the mission
2
Identify requirements for each node (power, electronics,
network connections, data, equipment, and personnel)
3
Determine capabilities and limitations of equipment,
given terrain and weather
4
Develop plans to mitigate the effects of terrain
and weather
5
Develop various communication courses of action to
support the concept of operations and provide for redundant capabilities by combining them, if required
6
Estimate timelines for installing communications
networks, including timelines for different insertion techniques in the event weather or terrain preclude the primary option
7
Submit satellite access, ground access, frequency,
equipment, and personnel augmentation requests to higher and supporting headquarters and agencies as soon as possible
8
Inform the commander about courses of action that
are not feasible without the assignment of additional personnel and/or equipment
9
Identify shortfalls and aspects of warfighting functions
that cannot be supported from a command and control perspective

This LOS study will help to determine position-
ing requirements, relay requirements, and antenna
farm positioning. The most widely employed
VHF tactical radio is the SINCGARS [single-
channel ground and airborne radio system] family
of radios.

## Ultra High Frequency

The UHF signals are absorbed by intervening ter-
rain and are another form of LOS communica-
tions; however, UHF signals are not restricted to
LOS and can bend somewhat over mountain tops.
During the Soviet-Afghan war, the Soviets
noticed the following:

 They could communicate using UHF radios out
to 100 kilometers (about 60 miles) if the transmitting and receiving stations were on high ground and any intervening terrain was midway and no higher than 198 meters (650 feet) above the stations.
 Taller mountains and multiple peaks interfered
with UHF communications.

Communications
Systems
Advantages
Disadvantages
HF
HF radios support long-range communications
Work best when stationary
Require more training than VHF or UHF Affected by terrain masking Greatly affected by terrain masking Limited to near LOS employment
VHF
Single-channel ground and airborne radio systems are highly
capable tactical radios due to their built-in communications security and electronic countermeasures capabilities
A LOS study will maximize the potential of VHF communications
UHF
Not restricted to LOS and can bend somewhat over mountain tops
Absorbed by intervening terrain
TACSAT
Some are small and lightweight
Geosynchronous satellite can be masked by mountainous terrain
Flexible and reliable
More susceptible to electronic warfare and interference Limited number of assigned satellites Limited data transfer
DTCS
Small and lightweight
More susceptible to electronic warfare and interference
Most are flexible and reliable DTCS radios provide position location Can send preformatted text messages Nongeosynchronous, low orbiting satellites are not masked by mountainous or urban terrain
EPLRS
Transmits position location
Because it is a LOS UHF radio, it is best suited for flat terrain
and a battlefield that is heavily populated with units
BFT
Transmits position location by geosynchronous satellite
Must have LOS to the geosynchronous satellite Vehicle mounted
Provides a reliable data communications link for sending preformatted and free text messages Satellite based, making it an ideal system for the mountains
MUX
Small and lightweight, broadband MUXs use frequencies in
the UHF, SHF, and EHF bands
More logistical and operating requirements than SCR systems Communications between MUX communications nodes will not be possible if there is intervening terrain between the nodes
 A single, closer (yet lower) peak cut transmissions to 20 to 22 kilometers (12 to 14 miles) and that was only if the mountain crest was narrow and both stations were aimed at the sharp peak.

 Large, domed mountains cut UHF transmissions
to 5 to 6 kilometers (between 3 and 4 miles), while cut-up rugged mountainous terrain further limited transmissions to 4 to 5 kilometers (about 2.5 to 3 miles).
 UHF communications were frequently lost
while moving along mountain roads or in the "silent zone" on the far side of mountains.

 UHF communications distance was cut to 10 to
12 kilometers (6 to 7 miles) if the intervening peak rose up to 100 meters (328 feet) higher than the stations.

 If there were a series of 200- to 400-meter
(650 to 1,300 feet) peaks between stations and if both stations were far enough away from the
mountain bases and used whip antennae, transmission distance was cut to 9 to 10 kilometers (5.5 to 6 miles).
These communications ranges involved knife edge diffraction, also known as obstacle gain diffraction. This method of establishing communication has typically been applied within the Marine Corps to high power, directional systems, such as the AN/TRC-170. The low power, omnidirectional

## Special Purpose Systems

UHF systems employed by Marines are not likely to experience such types of radio links. Measures to improve UHF communications in the mountains include the following:

 Select communications sites that have a narrow
single mountain crest between them. Aim the transmissions at the highest peak. Keep the sites away from the mountain base.
 Deploy radios away from the mountain base to
a distance at least equal to the distance of the slope between the base and mountain crest.

Special purpose communications systems support
specific functions, such as position location, navi-
gation, and intelligence dissemination. There are
many types of special purpose systems in the
Marine Corps inventory and many more are avail-
able when operating as part of a joint task force.
Marines must be able to employ these systems to
leverage the significant capabilities they repre-
sent. For example, the Distributed Tactical Com-
munications System (DTCS) is an extension of
"Netted Iridium," push-to-talk communications
capability. The DTCS can provide over-the-hori-
zon, on-the-move, beyond-LOS netted voice and
data communications over the Iridium network.

 Deploy radios to commanding heights to
improve their LOS to the top of the intervening mountain.

## Multichannel Radios

 Deploy radios where they can communicate
over a single mountain rather than a series of
peaks and defiles.
 When confronted with a large, domed mountain, deploy the radios away from the base of the mountain and on high ground.

## Tactical Satellite Radio

Broadband multichannel radios (MUXs) use fre-
quencies in the UHF, SHF [super high fre-
quency], and EHF [extremely high frequency]
bands. The demands of operating along these fre-
quency bands as well as performing multiplexing
functions require complex and relatively large
pieces of equipment. The MUX systems, there-
fore, have considerably more logistical and oper-
ating requirements than SCR systems. In
addition, they have a requirement to transmit and
receive a tightly-focused beam of radio energy,
which is not practical for units on the move. For
sustained operations in mountains, ground relay
stations or "RIPER" nets can be established to
relay large amounts of data. Planners should con-
sider the following MUX characteristics:

 MUX equipment is limited to LOS and, in
  some cases, a very low takeoff angle.

The radio of choice in the mountains is the TACSAT, also known as SATCOM, radio. It combines mobility, flexibility, and ease of operation with unlimited range. The PRC-117, PRC-148, PRC-152, VRC-110, and VRC-111 are all capable of transmitting SATCOM, UHF, and VHF voice or data and are suitable for base or mobile communications in the mountains. Though flexible and reliable in the mountains, TACSAT radios are more susceptible to electronic warfare and interference, channels are usually limited, and the radios have limited capability to support data transfer.

 Compartmentalized, mountainous terrain will
require more nodes and larger packages.

## Commercial Satellite Terminals

 Communications between MUX communications nodes will not be possible if there is intervening terrain between the nodes.
 MUX repeater sites can enable command and
control in the mountains. Repeaters need to be placed near or on the top of ridges or peaks.
Commercial satellite terminals with appropriate communications security modules can be used to provide reliable worldwide voice and data communications. These devices provide a firstin, redundant, and amplifying capability to TACSAT or SCR.

terrain study and detailed planning is required to make EPLRS work in mountainous terrain.

## Blue Force Tracking

 Wind speeds on top of ridges and peaks often
exceed the operational tolerances of MUX
antennas, requiring the antennas be taken down
during inclement weather.
 Satellite terminals, such as the Support Wide
Area Network system and the Secure Mobile Anti-Jam Reliable Tactical Terminal, along with older systems, such as the TSC-85 and TSC-93, provide a method of switched connectivity in addition to MUX that often makes them preferred over MUX in a mountainous environment.

## Enhanced Position Location Reporting System

Blue force tracking (BFT) provides a reliable data
communications link for sending preformatted
and free text messages. Because BFT uses satel-
lites vice ground radio relays, it is an ideal system
for mountainous environments, such as in
Afghanistan. Unlike the EPLRS, which is limited
by the LOS, BFT provides continuous coverage
despite the terrain and number of users on the
battlefield. It provides a near real-time feed to the
common operational picture and is a highly reli-
able means of text communication between dis-
persed units.

## Cell Phones

Because it is an LOS UHF radio, the enhanced position location reporting system (EPLRS) is best suited for flat terrain and a battlefield that is heavily populated with units. The system has limited use in dispersed rugged mountainous terrain as a position reporting system because of the LOS issues. Like any LOS system, it must have an unobstructed view to receive signals. A thorough

The proliferation and common use of cell phones
may provide opportunities to exploit operational
security issues, particularly as relay towers and/or
usage expand in the future.

## Chapter 10 Training Considerations

Fighting on steep slopes and at an altitude will dramatically alter such things as marksmanship and movement techniques and, unless planners understand and compensate for these differences, these changes can render units that are considered well-trained at sea level into a liability in the mountains. Therefore, Marine Corps units should focus on basic individual skills and on collective training in a mountainous environment to overcome the challenges that this environment presents. While the specialized technical skills that are highlighted in Army and Marine Corps doctrine (e.g., TC 3-97.61, MCRP 3-35.1B, and MCRP 3-35.1C) are useful, these specialized skill sets will only be needed by a few troops, such as mountain leaders and assault climbers, within each unit. Information is provided in this chapter on all mountain warfare training in the DOD for understanding in joint mountain operations. The high interaction and interoperability between the Army and Marine Corps in the operational environment adds additional importance to establishing common training standards and programs. Currently, the Marine Corps is the only Service with a standardized training list that addresses both individual and collective tasks that are needed in the mountains. The Marine Corps mountain warfare training curriculum is based on Navy/Marine Corps Departmental Publication (NAVMC) 3500.70A, Mountain Warfare Operations Training

## The Need For Specialized Training

During World War II, the German Army raised an entire corps of elite mountain troops called *gebirgs jaeger* (mountain hunter). Although not all of these troops were used in the mountains, they demonstrated superior abilities in almost all theaters of operation in which they were used. The German Fifth Gebirgs Division marched more than 248 miles, crossed mountain passes above 6,500 feet, and secured well-entrenched defenses on the Mestksas Line. Other gebirgs jaeger captured most of the Caucasus mountain region in the summer of 1942.

*Military Review*, Mountain Warfare and Readiness Manual, that focuses on the following fundamentals:

 Employ specialized mountain/cold weather
clothing and equipment.
 Survive in a mountain/cold weather environment.
 Mitigate the effects the mountain/cold weather
environment exerts on operations.
Individual and collective unit mountain and/or cold weather training is essential prior to conducting operations in these environments. Commanders will make every effort to maximize the training capabilities of the Marine Corps Mountain Warfare Training Center (MCMWTC) in order to enhance the units' warfighting capability in these challenging environments.

## Military Mountaineering Skill Sets

The Army and Marine Corps recognize three levels of military mountaineering skill sets. Figure 10-1, on page 10-2, highlights the method the Army's Northern Warfare Training Center (NWTC) and Army Mountain Warfare School (AMWS) use to train Soldiers for mountainous environments and build the requisite skill sets in units so an institutional memory can be maintained.

Note: Army Special Operations Forces
Mountaineering Operations Training Task in
United States Army, Special Operations
Command (USASOC) Regulation 350-12,
Special Operations Forces Mountaineering,
refers to Level I as being highest in the
USASOC. The USASOC levels of training are
reversed compared with conventional units.

## Level I: Tactical Rope Suspension Technician (Marine Corps)/Basic Mountaineer (Army)

The tactical rope suspension technician (TRST)/ basic mountaineer, a graduate of a TRST or basic mountaineering course, should learn the fundamental travel and climbing skills necessary to move safely and efficiently in mountainous terrain. These Marines should be comfortable functioning in this environment and, under the

## Recommended Individual Military Mountaineering Training Strategy

supervision of qualified mountain leaders or assault climbers, can assist in the rigging and use of all basic rope installations. On technically difficult terrain, the TRST/basic mountaineer should be capable of performing duties as the "follower" or "second" on a roped climbing team and should be well trained in using all basic rope systems. They may provide limited assistance to personnel unskilled in mountaineering techniques. Particularly adept Marines may be selected to be members of special purpose teams led and supervised by mountain leaders or assault climbers/ advanced mountaineers. At a minimum, TRST/ basic mountaineers should possess the following mountain-specific knowledge and skills:

 Characteristics of the mountainous environment (summer and winter).
 Mountaineering safety.
 Leading on class 4 and 5 terrain.
 Individual cold weather clothing and equipment use, care, and packing.
 Conducting multipitch rappelling.
 Basic mountaineering equipment care and use.
 Establishing and operating hauling systems.
 Mountain bivouac techniques.  Mountain communications.
 Establishing fixed ropes with or without intermediate anchors.
 Mountain travel and walking techniques.
 Moving on moderate angle snow and ice.
 Hazard recognition and route selection.  Mountain navigation.
 Establishing evacuation systems and performing high-angle rescue.
 Basic MEDEVAC.  Rope management and knots.

## Level Iii: Mountain Leader

 Natural anchors.  Familiarization with artificial anchors.  Belay and rappel techniques.  Fixed ropes (lines) usage.  Rock climbing fundamentals.  Rope bridges and lowering systems.  Individual movement on snow and ice.  Mountain stream crossings (to include water
survival techniques).
 First aid for mountain illnesses and injuries.

Note: Level I-qualified personnel should be
identified and prepared to serve as assistant
instructors to train unqualified personnel in
basic mountaineering skills. All high-risk
training must be conducted under the super-
vision of qualified level II or III personnel.

## Level Ii: Assault Climber (Marine Corps)/Advanced Mountaineer (Army)

Mountain leaders possess all the skills of the assault climber and have extensive practical experience in a variety of mountainous environments in both winter and summer conditions. Level III mountaineers should have well developed hazard evaluation and safe route-finding skills over all types of mountainous terrain. Mountain leaders are best qualified to advise commanders on all aspects of mountain operations, particularly the preparation and leadership required to move units over technically difficult, hazardous, or exposed terrain. The mountain leader is the highest level of qualification and is the principle trainer for conducting mountain operations. Level III qualification is required to supervise all high-risk training associated with level II. Instructor experience at a military mountain warfare training center or as a member of a special operations forces mountain team is critical to acquiring level III qualification.

## Additional Knowledge And Skills

At a minimum, mountain leaders should possess the following additional knowledge and skills:

 Preparing route, movement, bivouac, and operational risk management.
 Recognizing and evaluating peculiar terrain,
weather, and hazards.
 Performing avalanche hazard evaluation and
mitigation.
Assault climbers and/or advanced mountaineers are responsible for the rigging, inspection, use, and operation of all basic rope systems. They are trained in additional rope management, knot tying, belay, rappel techniques, and the use of specialized mountaineering equipment. Assault climbers and/or advanced mountaineers are capable of rigging complex, multipoint anchors, and high-angle raising and/or lowering systems. Level II qualification is required to supervise all high-risk training associated with level I. At a minimum, assault climbers should possess the following additional knowledge and skills:

 Organizing and leading avalanche rescue operations.
 Using specialized mountaineering equipment.
 Planning and supervising roped movement
techniques on steep snow and ice.
 Performing multipitch climbing on rock.
 Conducting glacier travel and crevasse rescue.  Conducting ski instruction.  Planning and conducting skiborne patrols in
class 3 and 4 terrain.
 Using winter shelters and survival techniques.  Conducting multipitch climbing on mixed terrain (rock, snow, and ice).
 Leading units over technically difficult, hazardous, or exposed terrain in winter and summer conditions.
 Advising commanders and staff during planning on mountain warfare considerations across all warfighting functions.

## Marine Corps Mountain Warfare Training Center

Training at MCMWTC should be conducted prior to deploying to a mountainous and/or cold weather operational environment. Training should replicate the high altitude, mountainous, and cold weather conditions associated with the operational environment. At the MCMWTC, training is conducted at both the individual and unit level. The individual training by formal school courses is considered an integral part of unit training and should be scheduled 1 to 3 months before unit training and deployment.

## Collective Training

The established collective training exercise is called Mountain Exercise. It is designed and customized to train all elements of the MAGTF and is normally divided into three phasespre-environmental, environmental, and mission rehearsal. Situations will arise when units are deployed to a mountainous area of operations without prior training. The unit should use their mountain leaders to schedule, prepare, organize, and conduct in theater training. This usually takes 2 to 3 weeks and is accomplished concurrent with acclimatization. If the unit does not have mountain leaders, mobile training teams can be requested from MCMWTC. The suggested training is not meant to be all inclusive; rather, it is a guide that commanders may use to develop a customized mountain warfare training package.

## Phase 1: Pre-Environmental Training

Pre-environmental training (PET) is conducted over 3 to 5 days, preferably before a unit deploys to a mountainous environment (upon initial arrival, if necessary). It includes individual entrylevel training using the 2000-level tasks from NAVMC 3500.70A. This phase encompasses environmental considerations, hazards and mitigation, the use of specialized clothing and equipment, and historical lessons learned. Refresher training prior to any significant change in altitude, topography, and/or temperature is recommended.

## Phase Ii: Environmental Training

This training is conducted over 7 to 11 days at the operational altitude and/or climate. This phase focuses on collective 3000- to 6000-level events from NAVMC 3500.70A. Emphasis is initially placed on survival, movement, and fighting skills, then environmental considerations for TTP are taught at the small unit and company levels. Units fire organic weapons and practice MOS skills in the environment. If required, phase II incorporates enhanced 2000-level mobility training events. This training may include advanced mountain and overthe-snow mobility training, driver training, medical training, and animal packing.

## Phase Iii: Marine Expeditionary Brigade/Marine Expeditionary Unit Mission Rehearsal Exercise

This training is conducted over 4 to 5 days. The final phase is to exercise the entire MAGTF on 6000- to 9000-level tasks from NAVMC 3500.70A. The following exercises test MAGTF dispersed operations in complex, compartmentalized, mountainous terrain that replicates elevations and climates found in the operational environment:
to lead climbs on vertical to near vertical terrain. Two per platoon (with six TRSTs) are recommended to enhance the vertical obstacle maneuver capabilities of the unit.

## Urban Assault Climber

 The command element tests its ability to effectively plan, command, and control the conduct of anticipated dispersed mission profiles across all elements of the MAGTF.
 The GCE tests its ability to shoot, move, and
communicate.
Urban assault climbers are TRST-qualified Marines who are trained and certified to lead climbs on vertical to near vertical urban obstacles.

## Scout Skier

 The ACE conducts air missions; maintenance
of aircraft; logistic support; LZ use at high altitude, on ridgelines, and/or in snow; and the establishment of FARPs.
 The logistics combat element tests its ability to
provide CSS to the MAGTF that is focused on the use of CASEVAC/MEDEVAC, aerial resupply, and ground resupply over restricted terrain using animals or over-the-snow vehicles.

## Individual Training

Scout skiers are scouts and reconnaissance Marines who are trained and qualify as military skiers. They possess the skill to negotiate arduous snow-covered and avalanche-prone terrain on skis and are skilled in basic tracking/countertracking, avalanche assessment, and avoidance. Reconnaissance, scout snipers, and other designated scouts (one platoon per rifle company or one company per battalion) should receive this advanced, over-the-snow mobility training.

Individuals may be specially trained for one or more of the functions discussed in the following subparagraphs.

## Mountain And/Or Cold Weather Medical Training Tactical Rope Suspension Technicians

Some corpsmen, doctors, and medics receive training in mountain, cold weather, and/or altitude-related environmental illnesses and casualty handling. Four per company are recommended for each seasonal skill set.

## Animal Packing

Animal packers are trained to care for, pack, and lead pack animals through arduous and often inaccessible terrain in order to conduct resupply, transport crew-served weapons, and handle CASEVAC. Four per platoon are recommended.

## Mountain Communicators

A TRST is a Marine trained in the skills necessary to establish all rope systems used in tactical operations, which include high tension rope installations, rappelling, water obstacle crossing, fixed ropes on steep earth, balance climbing, and top roping. A TRST can also serve as a number 2 climber to the lead climber (assault climber). A TRST, who is an NCO or above, is certified as a rappel master to conduct rappelling operations on a tower. A TRST is the minimum certification for NCOs and above to conduct TRST training on vertical to near vertical terrain for rappelling, top roping, and fixed ropes. Two TRSTs per rifle squad are recommended.

## Assault Climbers

Mountain communicators are communications personnel who have been trained in radio communications in complex, compartmentalized, mountainous terrain. Four per company are recommended.

An assault climber is a TRST-qualified Marine who receives additional training and is certified

## Mountain Scout Snipers

Mountain scout snipers are snipers who receive additional training in high-angle marksmanship, stalking, tracking, and countertracking in snow-covered and rock-covered terrain. These special skills are required in order to execute long-range reconnaissance and surveillance patrols in high altitude, complex, compartmentalized, mountainous terrain. Four per scout sniper platoon are recommended.

## Mountain Operations Staff Planners

These planners are staff personnel who have been specifically trained in the considerations for planning mountain warfare operations across the six warfighting functions and aviation planning using the Marine Corps Planning Process. This course is recommended for battalion level and higher staff planners.

## Mountain Machine Gunners

These personnel are machine gunners who have learned TTP used in highly compartmented, mountainous terrain, both mounted and dismounted. Training includes machine gun employment in talus, deep snow, and ice; high-angle firing; defilade firing; and ridgeline and crosscompartment movement.

## Mountain Leader (Company Grade Officers And Staff Noncommissioned Officers)

The mountain leaders' current training is divided by season. A completely trained mountain leader has attended both the summer and winter mountain leader courses. The summer trained mountain leader is a qualified TRST and an assault climber. He/She is also skilled in alpine movement and glacier travel. The winter mountain leader is a scout skier and certified as a military skier. He/She is skilled in all aspects of warfighting in a coldweather and snow-covered environment. The primary role of the mountain leader is to train, advise, and plan company- and platoon-level dispersed operations in those parts of complex, compartmentalized terrain that would otherwise be inaccessible to the unit commander. Mountain leaders have the knowledge and skills to operate in all types of mountainous terrain and weather conditions (high to very high altitude; wet and/or dry and/or extreme cold; rock-/snow-/ice-covered slopes to vertical). Recommendations are two per infantry company, two per scout sniper platoon, three per reconnaissance company for a reconnaissance battalion, and two per team for United States Marine Corps Forces, Special Operations Command.

## Army Training Northern Warfare Training Center

The Army NWTC is located at Ft. Wainwright, Fairbanks, Alaska, and features the

 Basic Military Mountaineer15-day course
(summer only).
 Assault Climber Course15 days (summer
only, basic is prerequisite).
 Cold Weather Orientation Course4 day
course.
 Cold Weather Leaders Course13-day course.

## Mountain Warfare School

The AMWS is located at Camp Ethan Allen, Jericho, Vermont, and features the

 Basic Military Mountaineer, Summer14-day
course, 5 per season.
 Basic Military Mountaineer, Winter14-day
course, 3 per season.
 Advanced
Military Mountaineer Course,
Summer14 days (basic is prerequisite), 2 per season.
 Advanced Military Mountaineer Course,
Winter14 days (basic is prerequisite), 1 per season.
 Mountain Marksmen-Sniper (see Army Training Requirements and Resources System for more detail on course schedule and availability).
focuses on scenarios that show ways each agency can benefit the other's mission.

 Rough Terrain Evacuation (see Army Training
Requirements and Resources System for more detail on course schedule and availability).

## Coalition Training In Mountain Warfare

 Mountain Leader Orientation Course7 days,
three per year.

## Special Forces Command Mountaineering Warfare Training Detachment

This training is located at Ft. Carson, Colorado Springs, Colorado, and features the

 Senior Mountaineering Course6 weeks.  Master Mountaineering Course3 weeks.
Coalition countries that are mountainous often have training courses, but few are taught in English. These courses can expand the base of knowledge and experience of Marines, but are not a substitute for standardized Marine Corps mountain warfare training. The language of instruction should be verified prior to training. Coalition exercises in mountainous terrain in Norway and Slovenia are the best means to mutually exchange TTP:

## Navy Sea-Air-Land Team Cold Weather Maritime Course

 Norway: the Marine Corps is provided annual
quotas to the Allied Officers Winter Warfare Course (5 weeks long) and the Commander's Winter Warfare Course (10 days long).
The SEAL [sea-air-land] team cold weather training is located at Kodiak, Alaska. It is a 28-day course covering basic cold weather survival, navigation and/or movements, and cold water training.

 Slovenia: Slovenian Armed Forces Mountain
Warfare School is a training opportunity for United States European Command and special operations forces units. The course mirrors AMWS courses and is 15 days long.

## Army National Guard High Altitude Aviation Training Site

Exchange programs exist in mountain warfare that are concentrated on the northern North Atlantic Treaty Organization requirement (British, Dutch, and Norwegian). The experience gained from these programs applies to all mountain warfare environments as well as to interoperability.

The Army National Guard school for high altitude training of rotary-wing pilots is located in Gypsum, Colorado, and is 7 days long. Flying is conducted at elevations ranging from 1,981 to 4,267 meters (6,500 to 14,000 feet).

## Training Charts Interagency Training

Department of State training with provisional reconstruction team counterinsurgency operations Tables 10-1 through 10-4, on pages 10-8 and 10-9, break down the available instruction by individual, collective, and aviation summer and cold weather training.

Location
Course Name
Duration
Level
Equivalent
MCMWTC, SOTGs
TRST
15 days
1
Basic mountaineer (summer)
NWTC
BMS
15 days
1
Marine Corps TRST
AMWS
BMS
14 days
1
Marine Corps TRST
MCMWTC, SOTG
Assault climber (TRST is first 2 weeks)
4 weeks
2
USA assault climber (summer)
NWTC
Assault climber
15 days (+ BMS)
2
ACC
AMWS
Assault climber, summer (prerequisite is BMS)
14 days (+ BMS)
2
ACC
MCMWTC
Mountain leaders course (summer)
6 weeks
3
USA basic mountaineer and assault climber (summer)
10th SF Group Instructor Cadre
SF senior mountaineering
6 weeks
2
TRST/ACC portion of SMLC
10th SF Group Instructor Cadre
SF master mountaineering
3 weeks
3
Alpine portion of SMLC
MCMWTC
Mountain communications
15 days
S
None
MCMWTC
Animal packers
18 days
S
10th SF Mountain Animal Packers Course
MCMWTC
Mountain scout snipers
17 days
S
None
MCMWTC
Mountain operations staff planners
8 days
S
None
MCMWTC
Mountain machine gunners
14 days
S
None
Legend ACC BMS S SF SMLC SOTG USA
assault climber course basic mountaineer summer supporting (specialized training for a certain MOS or unique skill) special forces Summer Mountain Leader Course Special Operations Training Group United States Army
Location
Course Name
Duration
Equivalent
High altitude aviation training site
High altitude aviation training
7 days
None
Location
Course Name
Duration
Level
Equivalent
AMWS
BMW
14 days
1
Portion of WMLC
AMWS
Assault climber, winter (prerequisite is BMW)
14 days (+ BMW)
2
Portion of SMLC
MCMWTC
WMLC
6 weeks
3
AMWS and NWTC basic mountaineer and assault climber (winter)
MCMWTC
Scout skier
14 days
1
USA CW leaders
NWTC
CW orientation
4 days
1
PET
NWTC
CW leaders
13 days
S
Scout skiers
MCMWTC
Mountain medicine
12 days
S
None
MCMWTC
CW medicine
12 days
S
None
SEAL Team Detachment, Kodiak, AK
SEAL CW maritime
28 days
S
Portion of WMLC, maritime is unique
Legend BMW CW S SEAL SMLC USA WMLC
basic mountaineer winter cold weather supporting (specialized training for a certain MOS or unique skill) sea-air-land Summer Mountain Leader Course United States Army winter mountain leader course
Location
Course Name
Duration
Equivalent
MCMWTC
PET
3 days
None
MCMWTC
Environmental training
5 days
None
MCMWTC
Enhanced mobility training
7 days
None
MCMWTC
Mission rehearsal exercise
7 days
None

## Appendix A Altitude And Environmental Hazards

The following subparagraphs discuss seven illnesses caused by high altitude.

## Acute Mountain Sickness

Acute mountain sickness (AMS) is caused by ascending too rapidly to high altitude. Symptoms may include headache, nausea, vomiting, fatigue, irritability, insomnia, or dizziness. Symptoms generally appear 4 to 24 hours after ascent to high altitude, reach peak severity in 24 to 48 hours, and subside over 3 to 7 days at the same altitude.

High mountains are inherently dangerous. They can be unforgiving for those without adequate knowledge, training, and equipment. All personnel must understand that the interaction of environmental conditions with mission responsibilities and individual characteristics can significantly impact the health of troops. Sound planning and preparation can prevent or reduce an adverse impact. Troops operating in high mountains need time to acclimate. All troops should be aware of the threats associated with operations in high altitudes and use personal protective measures to minimize disease and nonbattle injuries.

## High-Altitude Illnesses

Operating in the mountains stresses the human body. To become acclimated, the human body must go through physiological changes that will vary from person to person. Successful acclimatization depends on three factors (see table A-1):

 The degree of hypoxic stress (altitude).  The rate of onset of hypoxic stress (ascent rate).
To treat AMS, Marines must stop further ascent and descend. Continuing an ascent puts individuals at risk for more severe high-altitude illnesses. Acetazolamide or dexamethasone may be used for the prevention of AMS. Aspirin, ibuprofen, or acetaminophen may be used to treat headaches and prochlorperazine, promethazine, and Alka- Seltzer may be used to treat nausea. Acetazolamide can also be administered to help speed up the acclimatization process, which, in turn, helps to relieve AMS symptoms. The use of aspirin, ibuprofen, acetaminophen, or other nonsteroidal anti-inflammatory drugs for an AMS headache should be avoided or minimized during combat

 Individual physiology (genetic differences
between individuals).

Altitude
Approximate Elevation
Effects of Acute Altitude Exposure
Low
Sea Level - 1,200 m (4,000 ft)
None
Moderate
1,2002,400 m (4,0007,870 ft)
Mild altitude illness and decreased performance may occur
High
2,4004,000 m (7,87013,125 ft)
Altitude illness and performance decrements are more common and more acute
Very High
4,0005,500 m (13,12518,000 ft)
Altitude illness and decreased performance is the rule
Extreme
5,500 m (18,000 ft) and higher
With acclimatization, humans can function for short periods of time
Legend ft
feet
m
meters

operations because of their detrimental effect on blood coagulation. Acute mountain sickness alone does not mean that descent is absolutely necessary. Stopping the ascent to rest and acclimatize to the same altitude will resolve AMS in 3 days or less (in most individuals)the best option in cases of mild AMS. Medical therapy is crucial when descent is not possible. Use of any medication should be discussed with a physician. Once symptoms have gone away, troops can resume gradual ascent. Those who continue to show signs of AMS must be observed for development of high altitude pulmonary edema (HAPE) or high altitude cerebral edema (HACE), both of which could be fatal. All troops are susceptible to high altitude illness. A staged or graded ascent, or movement to a lower altitude, can prevent AMS. Limited evidence suggests that a high carbohydrate diet, such as whole grains, vegetables, peas and beans, potatoes, fruits, honey, and refined sugar, can also reduce AMS symptoms.

## High Altitude Pulmonary Edema

High altitude pulmonary edema occurs when individuals ascend too rapidly to high altitude or ascend too rapidly from a high to a higher altitude. High altitude pulmonary edema normally begins within 24 to 72 hours after rapid ascent to 2,438 meters (8,000 feet) or more. Symptoms include coughing, noisy breathing, wheezing, gurgling in the airway, difficulty breathing when at rest, and deteriorated behavioral status, such as confusion or vivid hallucinations. High altitude pulmonary edema occurs in 2 to 15 percent of people brought rapidly to altitudes above 2,438 meters (8,000 feet). Troops experiencing AMS who are not treated and continue to ascend to higher altitudes are at significant risk for HAPE. If untreated, HAPE can be fatal within 6 to 12 hours. It is the most common cause of death among altitude-related illnesses. Preventive measures include staged and graded ascent, proper acclimatization, sleeping at the lowest altitude possible, avoiding cold exposure, and avoiding strenuous exertion until acclimated. Immediate descent is the best treatment for HAPE. If available, a hyperbaric chamber, such as the Gamow Bag (a portable hyperbaric chamber weighing 14 pounds), can take a patient from 4,267 to 2,134 meters (14,000 to 7,000 feet) in 4 to 6 hours if evacuation to lower altitudes is not possible. Operated by a foot pump, the bag is pressurized to an internal pressure of 2 pounds per square inch.

## High Altitude Cerebral Edema Caution

High altitude cerebral edema is the most severe illness associated with high altitudes. Individuals with HACE frequently have HAPE. As with other high altitude illnesses, HACE is caused by ascending too rapidly without proper acclimatization. Troops experiencing AMS should be closely monitored for the development of HACE. Troops with AMS who continue ascending are considered to be at high risk for HACE. In general, HACE occurs later than AMS or HAPE. If untreated, HACE can progress to coma in 12 hours and death within 24 hours. In some instances, death has occurred in less than 12 hours. The average onset time of symptoms following ascent is 5 days with a range of 1 to 13 days. Symptoms of HACE often resemble AMS (severe headache, nausea, vomiting, and extreme lethargy); however, a more visible indicator for Injuries, such as burns or cuts, may require descent for effective treatment and healing.

## Environmental Threats

the onset of HACE is a swaying upper body, especially when walking. Early behavioral deterioration may include confusion, disorientation, and inability to speak coherently. Marines may appear withdrawn or demonstrate behavior generally associated with fatigue or anxiety.

The following subparagraphs address conditions that are not unique to mountainous environments but commonly occur at high elevations.

## Nonbattle Injuries

Preventive measures for HACE are the same as for AMS and HAPE. Those with symptoms of HACE should be evacuated immediately. Treatment of HACE is immediate descent at first sign of symptoms, such as swaying upper body and change in behavioral status. Decadron and oxygen are used to treat HACE. If available, a hyperbaric chamber (such as a Gamow Bag) can be used to stabilize patients if evacuation to lower altitudes is not possible, but should NOT be used as a substitute for descent.

## High Altitude Systemic Edema

Exhaustion, dehydration, lower limb orthopedic injuries, lower back injuries, frostbite, diarrhea, malaria, and weight loss are the most common nonbattle-related injuries in the mountains. Hypoxia, an inadequacy in the oxygen reaching the body's tissues, and cold can impair judgment and physical performance, resulting in a greater risk of injury while operating in rugged terrain.

## Cold Injuries

High altitude systemic edema is the swelling of tissue and joint discomfort that may occur due to rapid ascent. Persons with high altitude systemic edema may not exhibit any other symptoms of high altitude sickness.

## High Altitude Retinal Hemorrhaging

High altitude retinal hemorrhaging only occurs at extremely high altitudes (almost always found above 4,572 meters or 15,000 feet). Signs can only be seen with an ophthalmoscope. Vision can be blurred in severe cases.

Once a Service member has acclimated to altitude, cold injuries are generally the greatest threat. Frequent mountain winds may prove dangerous due to windchill effects. Because hypoxiainduced psychological effects can result in poor judgment and decisionmaking, a higher incidence of cold injuries should be anticipated. Preventive measures for cold injuries include command emphasis on maintaining nutrition, drinking plenty of fluids, and dressing in layers.

## Subacute Mountain Sickness Heat Injuries

Subacute mountain sickness occurs in some people during prolonged deployments (weeks to months) to elevations above 3,474 meters (11,400 feet). Symptoms include sleep disturbance, loss of appetite, weight loss, and fatigue. This condition reflects a failure to acclimate adequately.

## Poor Wound Healing

Poor wound healing may occur at higher elevations and results from lowered immune functions.

Standard heat injuries, such as heat cramps, heat exhaustion, and heat stroke, can occur in the mountains. They occur during movements, especially upslope with heavy loads or at high altitude with heavy loads. Personal protection equipment can restrict evaporation of sweat (body cooling) and also cause heat injuries. Commanders need to balance the load, personal protection equipment, and pace with the altitude and degree of slope.

## Injuries Caused By Sunlight

The potential for solar radiation injuries caused by sunlight increases at high altitudes due to higher ultraviolet radiation in the thinner atmosphere and the reflection of light on snow and rock surfaces. Solar radiation injuries will occur with less exposure at high altitude than at low altitude and include sunburn and snow blindness.

## Sunburn

Sunburn is more likely to occur on partly cloudy or overcast days when troops are unaware of the threat and fail to take appropriate precautions. Applying sun block (at least 15 SPF [sun protection factor]) to all exposed skin helps to prevent sunburn. Some medications, such as acetazolamide, increase the danger of sunburn.

## Snow Blindness

Snow blindness results from ultraviolet light absorption by the external parts of the eyes, such as the eyelids and cornea. Initially, there is no sensation, other than brightness, as a warning that eye damage is occurring. Sunburn-like damage can occur in a matter of hours. Sunglasses or goggles with ultraviolet protection will prevent snow blindness. Sunglasses with side protectors are recommended. In the event of lost or damaged sunglasses, emergency goggles can be made by cutting slits in dark fabric or tape folded back onto itself. Treatment for snow blindness includes covering the eyes with a dark cloth if the casualty is not needed to perform the mission. The cloth will prevent light from reaching the eyes and it will help to keep the casualty from moving his/her eyes, which could result in additional pain. A muslin bandage may be folded into a cravat and used to keep the cloth in place or the cravat may be used as a blindfold. Do not put ointment in the eye.

## Terrain Injuries

Troops should be aware of the dangers of high altitude, including snow avalanches and rock falls. Poor judgment at high altitude increases the risk of injury. The potential for being struck by lightning is also increased at higher altitudes, especially in areas above the tree line. Protective measures include taking shelter in solid-roofed structures or vehicles; laying in depressions, such as creek beds; and avoiding tall structures or large metal objects.

## Carbon Monoxide Poisoning

Carbon monoxide poisoning is a frequent hazard. Heavier than oxygen, carbon monoxide settles in the bottom of tents and enclosures. Tent ventilation should be at the lowest point in the tent to ensure carbon monoxide is able to escape. The following can lead to increased carbon monoxide levels:

 Inefficient fuel combustion.  Combustion heaters and engines in enclosed,
poorly ventilated spaces.
 Cigarette smoking.
Preventive measures include ensuring that troops do not sleep in vehicles with the engine running, ensuring heaters and stoves work properly, and ensuring tents have adequate ventilation.

## Infectious Diseases

Although there is generally a reduced threat of disease at higher elevations, troops should take precautions to avoid diseases caused by insects, plants, and animals and diseases transmitted person to person. At moderate to high altitudes, insect-borne disease (from mosquitoes, ticks, and flies) is common. In some areas, malaria-bearing mosquitoes live as high as 1,828 meters (6,000 feet). The threat of diseases transmitted from person to person is increased at higher, cold climates because troops will spend more time inside tents and huddling to stay warm. Crowding and poor ventilation in tents and other shelters increase dissemination of respiratory infections. The influenza (flu) vaccination is a preventive measure.

## High Altitude Operational Impacts

The effects of altitude on the mind and body impact operations in several ways.

## Reduced Physical Performance

accompanied by errors in judgment that may lead to mistakes and accidents. Use of the buddy system during this early exposure time helps to identify troops who may be more severely affected. Troops may become irritable, quarrelsome, anxious, apathetic, or listless. These mood changes reach a peak after 18 to 24 hours of altitude exposure and recede to normal after 48 hours at altitudes up to 4,724 meters (15,400 feet). Building esprit de corps and unit cohesion before deployment and reinforcing them during deployment will help minimize the impact of mood swings.

## Sleep Disturbances

Hypobaric hypoxia causes a reduction in physical performance. Personnel cannot maintain the same physical performance at high altitude that they can at low altitude, regardless of their fitness level. Measures to prevent disease and injury include acclimatization, adjusting work rates and load carriage, planning frequent rests during work and exercise, and planning and performing physical training programs at altitude.

## Psychological Effects

High altitude can have significant effects on ability to sleep. The most prominent effects are frequent periods of apnea (a brief pause in breathing) and fragmented sleep. Sleep disturbances occur in everyone above 3,048 meters (10,000 feet).

Altitude exposure may result in changes in vision, taste, mood, and personality. These effects are directly related to altitude and are common above 3,048 meters (10,000 feet). Some effects occur early and are temporary, while others may persist after acclimatization or even for a period of time after descent.

Reports of "not being able to sleep" and "awake half the night" are common and may also contribute to mood changes and daytime drowsiness. These effects have been reported at elevations as low as 1,524 meters (5,000 feet) and are very common at higher altitudes.

## Vision

Vision is generally the sense most affected by altitude exposure. Dark adaptation is significantly reduced, affecting personnel as low as 2,438 meters (7,900 feet) and can affect military operations at high altitude.

## Behavioral Effects

During cold weather operations eating a snack before bedtime is also helpful. Snacking before bedtime will help keep Marines warmer during sleep which prevents shivering and allows for sounder, more restful sleep. Ensuring adequate insulation when sleeping is also important as the body's core temperature decreases naturally during sleep. Acetazolamide has been found to improve sleep quality at high altitudes and reduce AMS and other altitude illnesses. Sleeping pills and other medications that promote sleep or drowsiness should be taken only with medical supervision.

Behavioral effects are most noticeable at very high and extreme altitudes and they include decreased perception, memory, judgment, and attention. To compensate for loss of functional ability, leaders should allow extra time to accomplish tasks.

## Dehydration

Dehydration is a very common condition at high altitude. Perspiration, vomiting, decreased thirst Alterations in mood and personality traits are common during high altitude exposures. Within hours of ascent, many individuals may experience euphoria (joy/excitement) that is likely to be sensation (hypoxia-induced), underconsumption of calories, and increased energy needs due to exertion increase the risk of dehydration. Routine activities and chores performed at high altitudes even common activities, such as walkingrequire increased exertion. Dehydration increases the likelihood of hot and cold weather injuries, altitude illness, and decreased physical capabilities. Many symptoms of dehydration and HACE are similar. Troops can prevent dehydration at high altitudes by consuming at least 3 to 4 quarts of water (including water consumed in food) or other noncaffeinated fluids per day and 6 to 8 quarts during cold weather. Individuals can drink a variety of fluids, such as juice or sports drinks, as each is an equally effective aid in rehydration. At high altitudes or cold weather, thirst is not an adequate warning of dehydration. Commanders must monitor troops to ensure they drink enough fluids and do not become dehydrated (see Technical Bulletin Medical 505, Altitude Acclimatization and Illness Management, and 508, Prevention and Management of Cold- Weather Injuries, for more information).

## Nutrition

Poor nutrition contributes to illness or injury, decreased performance, poor morale, and susceptibility to cold injuries. Influences that impact nutrition at high elevations include a dulled taste sensation (making food undesirable), nausea, lack of energy, or lack of motivation to prepare or eat meals. Poor eating habits (lack of fruits and vegetables or eating only a few MRE ration components) and dehydration may also lead to constipation or aggravation of hemorrhoids. Troops can reduce the effects of poor nutrition at high elevations by increasing their consumption rates. Rations should be supplemented and frequent snacking encouraged. High carbohydrate snacks are recommended since they are easily carried and require no preparation. Technical Bulletins Medical 505 and 508 also have more information on the importance of proper nutrition in the prevention of cold weather injuries.

## Toxins

Other products that can seriously impact military operations include tobacco, alcohol, and caffeine. Tobacco smoke interferes with oxygen delivery by reducing the blood's oxygen-carrying capacities. Tobacco smoke in close, confined spaces increases the amounts of carbon monoxide. The irritant effect of tobacco smoke may produce a narrowing of airways that interferes with optimal air movement. Smoking can effectively raise the "physiological altitude" as much as several thousand feet. Alcohol impairs judgment and perception, depresses respiration, causes dehydration, and increases susceptibility to cold injury. Caffeine from coffee and other sources may improve physical and mental performance; however, it also causes increased urination (leading to dehydration) and should be consumed in moderation.

## Appendix B Mountain Weather Data Wet Cold Cold Weather Categories

Wet snow and rain often accompany wet cold conditions. This type of environment is often more dangerous to troops and equipment than the colder, dry cold environments because the ground becomes slushy and muddy and clothing and equipment become wet and damp. Because water conducts heat 25 times faster than air, core body temperatures can quickly drop if Marines become wet and the wind is blowing; they can rapidly become casualties due to weather if not properly equipped, trained, and led. Wet cold environments combined with wind can be even more dangerous because of the wind's effect on the body's perceived temperature (see fig. B-3 on page B-2). Wet cold can quickly lead to hypothermia, frostbite, and trench foot. Wet cold conditions are not only found in mountainous environments, but also in many other environments during seasonal transition periods. Under wet cold conditions, the Cold weather temperature extremes are seasonally associated with most mountainous environments and almost always associated with high altitude. Because of the impact cold temperatures can have on personnel and equipment, it is important for military planners to understand the unique characteristics associated with operating in this type of weather. The Army and Marine Corps divide cold weather temperatures into the four categories shown in figures B-1 and B-2 (differences are shown for joint operations understanding). The one exception is that the Army adds one category due to the operational design of the force. Due to the expeditionary nature of the Marine Corps, its equipment is generally not designed to operate below -25 F. The climatic definitions outlined in the following subparagraphs will generally have the same impact on operations.

## Marine Corps Categories

| Wet Cold:     | +39 F to +20 F   |
|---------------|--------------------|
| Dry Cold:     | +19 F to -4 F    |
| Intense Cold: | -5 F to -25 F    |
| Extreme Cold: | Below -25 F       |
Army Categories
Wet Cold:
+39 F to +20 F
Dry Cold:
+19 F to -4 F
Intense Cold:
-5 F to -25 F
Extreme Cold:
-25 F to -40F
Acute Cold:
-40 F and below

ground alternates between freezing and thawing because the temperatures fluctuate above and below the freezing point, which makes planning problematic. For example, areas that are trafficable when frozen could become severely restricted if the ground thaws (see MCRP 3-35.1D).

## Dry Cold

Like wet cold, proper equipment, training, and leadership are critical to successful operations. Though temperatures are colder, the dry cold environment is the easiest of the four cold weather categories in which to survive because of low humidity and constant frozen ground. As a result, people and equipment are not subject to the effects of the thawing and freezing cycle and precipitation is generally in the form of dry snow. Windchill, however, is a complicating factor in this type of cold.

5
>120
>120
>120
>120
31
22
17
14
12
11
9
8
10
>120
>120
>120
28
19
15
12
10
9
7
7
6
15
>120
>120
33
20
15
12
9
8
7
6
5
4
20
>120
>120
23
16
12
9
8
8
6
5
4
4
25
>120
42
19
13
10
8
7
6
5
4
4
3
30
>120
28
16
12
9
7
6
5
4
4
3
3
35
>120
23
14
10
8
6
5
4
4
3
3
2
40
>120
20
13
9
7
6
5
4
3
3
2
2
45
>120
18
12
8
7
5
4
4
3
3
2
2
50
>120
16
11
8
6
5
4
3
3
2
2
2

## Intense Cold

Intense cold exists from -5 F to -25 F and can affect the mind as much as the body. Intense cold has a rapid numbing effect. Simple tasks take longer and require more effort than in warmer temperatures and the quality of work degrades as attention to detail diminishes. Clothing becomes more bulky to compensate for the cold so troops lose dexterity. Commanders must consider these factors when planning operations and assigning tasks.

## Extreme Cold

When temperatures fall below -25 F, the challenge of survival becomes paramount. During extreme cold conditions, it is easy for individuals to prioritize physical comfort above all else. Personnel may withdraw into themselves and adopt a cocoon-like existence. Leaders must expect and plan for weapons, vehicles, and munitions to fail in this environment. Most military equipment is tested and required to perform only at temperatures above -25 F. As in other categories, leadership, training, and specialized equipment is critical to operate successfully.

## Acute Cold

which this occurs is called the condensation (dew) point. The dew point varies depending on the amount of moisture in the air at the time it begins to cool. Air that contains a lot of moisture, or high humidity, can reach its dew point when the temperature cools to 68 F. However in very dry environments, condensation may not occur until the temperature drops to 32 F.

## Air Movement

Commanders and planners are warned that operations below -40 F are extremely hazardous. Units must be extensively trained before undertaking an operation in these temperature extremes.

## Precipitation

There are three ways that air can be lifted and cooled beyond its dew pointorographic uplift, convection, and frontal lifting. Mountain environments often experience some or all three, which contributes to the unpredictability of mountain weather:

## Orographic Uplift

Mountain precipitation is a result of several factors, the most important being humidity and air flow. It is important for military planners and leaders at all levels to understand the causes of precipitation in mountains and why precipitation rates vary. Precipitation results from cloud formations that, when accompanied by a drop in barometric pressure, are the best indicators of approaching adverse weather. Planners need to understand how clouds form and why precipitation occurs in order to predict mountain weather and its effect on operations. Before understanding clouds, however, a few MET concepts must be explained: humidity, air movement, cloud formation, and atmospheric pressure.

## Humidity

This phenomenon happens when an air mass is pushed up and over a mass of higher ground, such as a mountain. Due to the increase in altitude, the air cools until it reaches its condensation point. The result is precipitation. This type of lifting and cooling is the most common type in mountainous environments. In large mountainous areas where there are prevailing winds, the side of the mountain facing the wind often experiences high levels of precipitation while the backside of the mountain is drier because the clouds release their moisture before reaching the top and the air warms as it rolls down the opposite side. This weather also occurs even in warm weather mountainous areas. For example, the windward side of the Hawaiian Islands experiences a lot of rain, but the leeward side is comparatively dry and warm.

## Convection Effects

Convection is normally a summer effect due to the sun's heat reradiating off of the earth's surface and causing air currents to push straight up and lift air to its condensation point.

Humidity is the amount of moisture in the air. The amount of moisture air can hold is proportional to its temperature: the warmer the temperature, the more water the air can hold. Accordingly, cold air holds less moisture than warm air. Air is considered to be at its saturation point when it has 100 percent relative humidity. When air that is saturated is cooled, the moisture is released in various forms, such as clouds, rain, dew, snow, sleet, and fog. The temperature at

## Frontal Lifting

Cumulus clouds are formed from rising air currents and are prevalent in unstable air that favors vertical development. These currents of air create cumuliform clouds that give them a piled or bunched up appearance, looking similar to cotton balls. Within the cumulus family there are three different types that help to forecast the weather:
Frontal lifting occurs when two air masses of different temperature and moisture content collide. The resultant phenomena are known as fronts. Since the air masses will not mix, the warmer air is forced aloft; from there it is cooled until it reaches its condensation point.

## Cloud Formations

 Cumulus are fair weather clouds, but should be
observed for possible growth into towering cumulus and cumulonimbus.
 Towering cumulus clouds are characterized by
vertical development. Their vertical lifting is caused by some type of lifting action; for example, during summer afternoons when wind is forced to rise up the slope of a mountain or the lifting action that may be present in a frontal system. The towering cumulus has a puffy, cauliflower-shaped appearance.
Any time air is cooled below its saturation point, clouds are formed. Being able to identify clouds and understand how they are formed helps to predict weather changes, which is important to those who are planning or executing mountain operations. Clouds can be described and classified by height, by appearance, or by the amount of area covered (vertically or horizontally). Meteorologists recognize many different types of clouds. Cirrus, stratus, and cumulus are the most useful to military planners.

 Cumulonimbus clouds are characterized in the
same manner as the towering cumulus, forming the familiar thunderhead that produces thunderstorm activity. These clouds are characterized by violent updrafts that carry the cloud tops to extremely high elevations. Tornadoes, hail, and severe rainstorms are all products of this type of cloud. At the top of the cloud, a flat anvilshaped form appears as the thunderstorm begins to dissipate.

## Atmospheric Pressure

Cirrus clouds are formed of ice crystals at very high altitudes (usually 6,096 to 10,668 meters or 20,000 to 35,000 feet) but are thin, feathery clouds at the mid-altitudes. These clouds generally point in the direction of the air movement at their elevation and can provide up to 24 hours warning of approaching bad weather. Frail, scattered types, such as "mare tails" or dense cirrus layers are a sign of fair weather, but predict the arrival of precipitation and a front.

Besides cloud formations, changes in weather are also indicated by changes in atmospheric (barometric) pressure. Decreasing pressure normally indicates deteriorating weather, while increasing pressure usually indicates improving or good weather.

## Wind

Stratus clouds are formed at low and mid altitudes when a layer of moist air is cooled below its saturation point. Stratus clouds lie mostly in horizontal layers or sheets that resist vertical development. The word "stratus" is derived from the Latin word for "layer." A stratus cloud is characteristically uniform and resembles fog. It has a uniform base and a dull, gray appearance. Stratus clouds appear heavy and will occasionally produce fine drizzle or very light snow with fog. Because there is little or no vertical movement in stratus clouds, they usually do not produce heavy precipitation.

Mountains greatly affect the flow of air and amplify wind speed. Generally, valley winds on south-facing slopes (north-facing slopes in the southern hemisphere) change direction at different times of the day. When air is heated during the day, its density decreases and the air rises up the slope. The resulting winds are fairly gentle; however, at night the direction is reversed and it turns into a down slope wind. Down slope winds are caused by cooling air, which can occasionally be very strong. Wind speeds change as winds flow across mountains. For example, winds traveling down the leeward slope can become especially strong. Examples of these types of very strong winds are the Foshn in the Alps, the Chinook winds in the Rockies, and the Zonda winds in the Andes. Additionally, winds are accelerated when they converge through mountain passes and canyons to create a funneling effect. Because of this, wind may blast with great force on an exposed mountainside or summit. Mountain winds are subject to strong gusts and the force exerted by wind quadruples each time wind speed doubles; that is, wind blowing at 40 knots pushes four times harder than a wind blowing at 20 knots. So, it is important to pay attention not only to prevailing winds in the mountains, but wind gusts as well. As previously discussed, wind combined with cold temperatures will produce windchill (see fig. B-4), which can cause freezing and frostbite to exposed skin.

## Light Data

Sunrise, sunset, and the amount of useable light available for operations is relative to where personnel are physically located. Light data analysis in the mountains must be specific to the local area to be relevant to operations. See MCRP 3-35.1D for detailed information on predicting illumination depending on the time of year.

## Mountain Weather Hazards

Mountains create many natural hazards due to their slope and elevation. The following subparagraphs discuss landslides, avalanches, lightning strikes, flooding, and extreme cold weather. While there are other numerous hazards, these hazards can cause a catastrophic mission failure. By identifying these hazards, planners and leaders can mitigate these risks through composite risk management.

## Landslides And Rockfalls

Landslides are caused by disturbances in the natural stability of a slope. While they are not as common or dangerous as avalanches, they cause 25 to 50 deaths per year in the United States. Sometimes called mudslides, they usually accompany heavy rains or follow droughts, earthquakes, volcanic eruptions, or large explosions. They occur when water rapidly accumulates in the ground and results in a surge of water-saturated rock, earth, and debris. They usually start on steep slopes and have been known to bury entire villages. Rockfalls are not landslides, but they can be dangerous nonetheless. They usually occur in the springtime when the freeze-thaw action is most prevalent. This action causes boulders and rocks to dislodge and tumble down hills or cliffs. Rockfalls can block routes, injure personnel, and damage vehicles that are traveling below them. Engineers should conduct route reconnaissance along steep mountain trails that are cut into the sides of cliffs because these trails are often susceptible to rockfalls. In addition, because many mountain trails are often designed for foot or animal traffic, they may have unstable edges that can give way under heavy vehicle traffic, causing a rockfall or even a landslide of its own.

## Avalanches

Avalanches are similar to landslides; however, they occur on snow-covered mountains when the weight of the snow exceeds the cohesive forces that hold the snow in place. Like landslides, preexisting terrain conditions (slope characteristics and lack of ground cover) and weather (prevailing winds and snow type) combine with a trigger, which is often human activity, to cause avalanches. Military leaders should take advantage of avalanche maps and advice from local inhabitants and be trained to recognize and avoid avalanche danger areas whenever possible. The following slope characteristics are usually key factors in determining the likelihood of avalanche danger:

 *Slope angle*. Slopes as gentle as 15 degrees have
avalanched; however, most avalanches occur on slopes between 30 degrees and 45 degrees. Very few avalanches occur on slopes that are above 60 degrees, because such slopes are too steep to accumulate significant amounts of snow.
 *Slope profile*. Dangerous slab avalanches are
more likely to occur on convex slopes, but occasionally occur on concave slopes.
 *Slope aspect*. Snow on north-facing slopes is
more likely to slide in midwinter while snow on south-facing slopes is most dangerous in the spring and on sunny, warm days. Windward slopes are generally more stable than leeward slopes.
 *Ground cover*. Rough terrain and terrain with
more vegetation is more stable than smooth terrain. Avalanches are more likely on grassy slopes or scree because the snowpack doesn't have any natural anchors to which it can adhere.
The weather is also a significant factor in determining the risk of avalanche in the following ways:

 *Temperature*. In low temperatures, settlement
and adhesion occur slowly. Avalanches during extreme cold weather usually occur during or immediately following a storm. When temperature is just below freezing, the snowpack stabilizes quickly. At temperatures above freezing, especially if the temperature rises quickly, the potential for avalanche is high. Storms with a rise in temperature can deposit dry snow early, which bonds poorly with the heavier snow

## Extreme Cold Weather

deposited later. As a result, most avalanches occur during the warmer midday.

Extreme cold weather may overwhelm forces that are unprepared. See MCRP 3-35.1D for information on the following unique weather phenomena that can affect military operations in extreme cold environments:

 Ice fog.  Blizzards.  Whiteout.
 *Precipitation*. About 90 percent of avalanches
occur during or within 24 hours of a snowstorm. Additionally, the rate at which snow falls is important. High rates of snowfall (2.5 centimeters [1 inch] or more per hour), especially when accompanied by wind, are usually associated with periods of avalanche activity. Rain after a snow fall increases the weight of snow and tends to weaken the snowpack, increasing the likelihood of an avalanche.
 Grayout.  Temperature inversion.

## Mountain Weather Effects On Operations

 *Wind*. In sustained winds of 15 miles per hour
or greater, snow builds up in wind slabs on the leeward side slopes, which is why avalanches are more prone on the leeward slope than the windward slope.
Most victims trigger the avalanche that buries them. Generally, it is the additional weight of personnel or vehicles that triggers an avalanche. In some cases, triggers can be manmade noise or vibrations from vehicles, low-flying helicopters, firing, or explosions.

## Lightning Strikes

Lightning strikes frequently in the mountains due to rapidly changing and often violent weather patterns. Lightning kills more people in the United States than any other weather phenomenon and it is especially deadly in mountains. Lightning naturally seeks a path to high points and prominent features, so mountain peaks are prime targets. During thunderstorms, personnel should avoid mountain ridges, isolated trees, crests, peaks, and rock needles. Also, because lightning flows around and through objects like water, personnel should avoid gullies, washes, shallow depressions, shallow overhangs, and all bodies of water.

## Flooding

During the seasonal runoff, mountain-fed rivers can become extremely hazardous and rain at high elevations in snow-covered mountains can cause flash flooding. Many dry riverbeds also become hazardous and are at risk to flash flood.

Weather and visibility conditions in the mountainous regions of the world may create unprecedented advantages and disadvantages for combatants. To fight effectively, the commander must acquire accurate weather information about his/her area of operations. Terrain has a dominant effect on local climate and weather patterns in the mountains. Mountainous areas are subject to frequent and rapid changes of weather, including fog, strong winds, extreme heat, cold, and heavy rain or snow. As a result, many forecasts that describe weather over large areas of terrain are inherently inaccurate. Commanders must be able to develop local, terrain-based forecasts by combining available forecasts with field observations (local temperature, wind, precipitation, cloud patterns, barometric pressure, and surrounding terrain). Forecasting mountain weather from the field improves accuracy and enhances the ability to exploit opportunities offered by the weather, while minimizing its adverse effects. Table B-1, on page B-8, highlights the effects of weather in the mountains versus in flat terrain. Weather conditions in the mountains will have a significant impact on all military operations (see tables B-2 through B-9 on pages B-8 through B-13). The impact of weather on specific types of operations is highlighted in MCWP 3-35.7, MAGTF Meteorological and Oceanographic Support.

Weather
Condition
Flat to Moderate
Terrain Effects
Added Mountain Effects
Increased risk of sunburn and snow blindness Severe, unexpected temperature variations between sun and shade Avalanches
Sunshine
Sunburn Snow blindness Temperature differences between sun and shade
Increased risk and severity of common effects Avalanches
Wind
Windchill
Increased risk and severity of windchill Blowing debris or driven snow causing reduced visibility Avalanches
Rain
Reduced visibility Cooler temperatures
Landslides Flash floods Avalanches
Snow
Cold weather injuries Reduced mobility and visibility Snow blindness Blowing snow
Storms
Rain/snow Reduced visibility Lightning
Extended duration and intensity greatly affecting visibility and mobility Extremely high winds Avalanches
Fog
Reduced mobility/visibility
Increased frequency and duration
Cloudiness
Reduced visibility
Greatly decreased visibility at higher elevations
Element
Critical Value
Impact
Ceilingcloud and sky cover
< 200 ft
Engagement range
< 1,000 ft
Aerial observation
Surface visibility at the following wavelengths: 1.06 m, 35 m, 812 m
< 1 mi
Determination of enemy's ability to conceal actions Location and identification of targets
Wind (surface)
> 60 kt
Equipment damage
Precipitation
> 0.1 in/h liquid
Audio sensors and radar effectiveness
> 0.5 in/h liquid
Speed of personnel and equipment movement
> 2 in within a 12-h period
Speed of personnel and equipment movement Trafficability and storage of equipment
Snow depth and cover
> 6 in
Trafficability
Thunderstorms and lightning
Any occurrence within 3 mi
Troop and equipment safety False alarms and false readings
Temperature (surface)
> 122 F < -58 F
Emplacement site selection
Temperature (ground)
< 32 F
Trafficability assessment
Wet bulb globe temperature
> 85 F
Troop safety
EM propagation
Subrefraction and superrefraction
Ducting of radar transmission and returns
m
meters
mi
miles
>
greater than
<
less than
<
less than or equal to
Effective illumination
<0.0011 lux
Target acquisition
River stage and current strength
> 6-ft depth
Enemy's ability to cross rivers or streams
Legend EM
electromagnetic
ft
feet
h
hour(s)
in
inches
in/h
inches per hour
kt
knots
Element
Critical Value
Impact
Ceilingcloud and sky cover
< 1,000 ft
Concealment and cover from threat surveillance Tactical air and aerial supply support Background contact for target acquisition or using thermal devices
Surface visibility at the following wavelengths: 1.06 m, 35 m, 812 m
Dragon < 800 ft
Target acquisition
TOW < 1,600 m
System selection
Wind (surface)
> 7 kt
Smoke operations Background radar noise
> 20 kt
Visibility restriction in blowing sand and snow Soil drying speed Aerial resupply Windchill effect on equipment and personnel
> 30 kt
Accuracy of antitank missiles
> 75 kt
Antenna failure
> 125 kt
Equipment (van) failure
Precipitation
> 0.1 in/h liquid
Soil type (affected by temperature and moisture)
> 2 in within a 12-h period
Vehicle movement Site location River levels Runoff Flooding Delays in resupply Demolitions River crossing Visibility Target acquisition Radar effectiveness
Snow depth and cover
> 2 in within a 12-h period
Effectiveness of mines
> 6 in
Choice of construction materials
> 24 in
Trafficability
Freeze and thaw depth
< 6 in
Off-road employment of wheeled and tracked vehicles
Thunderstorms and lightning
Any occurrence within 3 mi
Munitions safety Personnel communications equipment safety
Temperature (surface)
> 122 F
Thermal sights
> 90 F
Lubricants, personnel, and infrared sensors
> 32 F
River crossing sites and off-road movements (affected by melting snow and ice)
< 32 F
Drying of soil Freeze or thaw depth
Any change of 50 F
Munitions trajectories
Windchill
< -25 F 1-min exposure
< -75 F 1-sec exposure
Time before exposed flesh will suffer frostbite
Legend ft
feet
h
hour
in
inch
in/h
inches per hour
kt
knots
m
meter
mi
mile
min
minute
sec
second
TOW tube launched, optically tracked, wire command link guided >
greater than
>
greater than or equal to
<
less than
<
less than or equal to
Element
Critical Value
Impact
Ceilingcloud and sky cover
< 600 ft
Target acquisition Copperhead performance
Visibilityslant range at the following wavelengths: 1.06 m, 35 m, 812 m
< 100 mi
Target acquisition
Windvertical profile
> 5-kt change/3,280 ft
UAS operations Nuclear fallout prediction
Thunderstorms and lightning
Any occurrence within 3 mi
Safety and storage of munitions
Effective illumination
< 0.0011 lux
Mission planning for night artillery operations
Legend ft
feet
kt
knots
m
meters
mi
miles
>
greater than
<
less than
<
less than or equal to
Element
Critical Value
Impact
Ceilingcloud and sky cover < 500 ft
Area of operations and location of facilities Personnel safety Aerial reconnaissance Camouflage needs
Visibility (surface)
< 0.25 mi
Mission planning Concealment and cover
Wind (surface)
> 13 kt
Construction and stability of bridges and structures
Precipitation
> 0.5 in/h liquid
Need for mines (reduced) Loading and offloading operations
Snow depth and cover
> 2 in within a 12-h period
Some areas of operations and locations of facilities Stability of bridge structures Types of demolitions to be used and size and charge
Blast from trigger mechanisms (may render mines ineffective)
Freeze and thaw depth
< 6 in
Trafficability determination
Thunderstorms and lightning
Any occurrence within 1 mi of site
Equipment and personnel safety Munitions protection
Temperature (ground)
< -32 F
Freeze or thaw depth determination Construction material Operations, personnel, and structures (threatened as a result of precipitation at or below 32 F)
Humidity
> 35%
Comfort, equipment operations, and site selection planning
Legend ft
feet
h
hour
in
inches
in/h
inches per hour
kt
knots
mi
miles
>
greater than
>
greater than or equal to
<
less than
<
less than or equal to
Element
Critical Value
Impact
Ceilingcloud and sky cover
< 300 ft (90 m)
Map-of-the-earth planning and acquisitionrotary wing
< 300 ft (90 m) flat terrain
Daylight target acquisitionfixed wing
< 500 ft (150 m) mountainous terrain
Daylight target acquisitionfixed wing
< 500 ft (150 m) flat terrain
Night target acquisitionfixed wing
< 1,000 ft (300 m) mountainous terrain
Night target acquisitionfixed wing
Visibility (surface)
< 0.25 mi (400 m)
Navigation and target acquisitionrotary wing
< 1 mi (1,600 m)
Landing and takeoff minimums for mission planning
< 3 mi (4,800 m)
Landing and takeoff minimums for mission planning
Visibility (slant range)
< 0.25 mi (400 m)
Navigation and target acquisitionrotary wing
< 3 mi (4,800 m) mountainous terrain
Navigation and target acquisitionrotary wing
Wind (surface)
> 30 kt
Mission planning
> 15-kt gust spread
Aircraft safety
Wind (aloft)
> 30 kt
Mission planningduration
Precipitation
Any freezing
Rotorblade icing Aircraft survivability and damage
> 0.5 in/h liquid
Target acquisition
Hail
> 0.25-in diameter
Aircraft damage
Snow depth and cover
> 1 in (2.54 cm) powder
Location of LZ and drop zone; vertigo
Icing
> Light (clear/rime)
Mission planning and safety Ordnance delivery restrictionsrotary wing
Turbulence
Moderate
Mission planning Aircraft survivability
Thunderstorms and lightning
Any occurrence within 3 mi of site
Refueling and rearming operations
Density altitude: variable with aircraft, weight, power, and temperature
> 6,900 ft
Flight control, runway limits, takeoff, and landing
Effective illumination
< 0.0011 lux
Mission planning for night operations
Legend cm
centimeters
ft
feet
in
inches
in/h
inches per hour
kt
knots
m
meters
mi
miles
>
greater than
>
greater than or equal to
<
less than
<
less than or equal to
Element
Critical Value
Impact
Wind (surface)
> 7 kt
Radar background noise
> 25 kt
Safety and stability for installing LOS and troposcatter antennas
> 69 kt
Wind damage to main communications antennalinear pole
> 78 kt
Safety and stability of SCR and short-range, wideband radio antennas
Precipitation
Any occurrence of freezing
Damage to equipment and antennas Wind tolerances of antennas Troop safety
> 0.5 in/h liquid
Blocking of troposcatter transmission Radar range (decreased) Signal for SCR, short-range wideband radio, and LOS communications (attenuated by precipitation)
Thunderstorms and lightning
Any occurrence within 3 mi
Damage to equipment Interference with radio signals, especially HF signals
Temperature (vertical gradient or profile)
All significant inversions
Fading during use of troposcatter equipment
Ionospheric disturbances
Not applicable
Dictation of most usable frequencies for communications
Legend in/h
inches per hour
kt
knots
mi
miles
>
greater than
Element
Critical Value
Impact
Snow depth and cover
> 2 in
Trafficability
Freeze and thaw depth
< 6 in
Site and equipment selection; mobility
Thunderstorms and lightning
Any occurrence within 3 mi
Equipment, personnel, and munitions safety
Temperature (surface)
> 122 F
Storage and required temperature control for movement of medicines
< -25 F
Munitions storage
Humidity
> 70%
Storage of selected supplies and munitions
Legend in
inches
mi
miles
>
greater than
<
less than
Element
Critical Value
Impact
Ceilingcloud and sky cover < 300 ft (90 m) flat terrain
Mission planning (day)jump altitude, aircraft penetration
< 500 ft (150 m) flat terrain
Mission planning (night)jump altitude, aircraft penetration
< 500 ft (150 m) mountainous terrain
Target acquisition (day)
< 1,000 ft (300 m) mountainous terrain
Target acquisition (night)
< 10,000 ft (3,000 m) mountainous terrain
Mission planning for LZ or drop zone
Surface visibility at the following visible wavelengths: 1.06 m, 35 m, 812 m
< 0.25 mi (400 m)
Mission planninginfrared sensors, navigation and target acquisitionrotary wing
< 1 mi (1,600 m)
Day mission planningminimum takeoff or landing, minimum fixed wing
< 3 mi (4,800 m)
Night mission planningminimum takeoff or landing, minimum fixed wing
Wind (surface)
> 13 kt
Troop safety for paradrop operations; limiting value for operations during training
> 15 kt (> 21 kt for C-12 and U-21 aircraft)
Mission planning and aircraft safety and recovery
> 25 kt (OV-1 aircraft)
> 30 kt and/or gust speeds
Mission planning and aircraft safety and recovery
Wind (aloft)
> 40 kt
Jump point Planning for flight route and duration
Precipitation
Any intensity or type
Rate of troop fall and target acquisition
Thunderstorms and lightning
Any occurrence
Aircraft performance; aircraft refueling; reliability of communications systems Predetonation of certain munitions
Temperature (surface)
< 32 F (0 C)
Ground conditions
PA
< 100 ft
Parachute opening altitude
Density altitude: variable with aircraft, weight, power, and temperature
> 6,900 ft
Planning Cargo limits
> 4,000 ft
Weight limits for attack and OH-58 aircraft
> 2,000 ft
OH-58 troop configuration (limited)
Legend C
degrees Celsius
ft
feet
kt
knots
m
meters
mi
miles
PA
pressure altitude
>
greater than
>
greater than or equal to
<
less than or equal to

## Appendix C Unmanned Aircraft System Information

UAS
Category
Maximum
Gross Takeoff
Weight (lbs)
Normal
Operating
Altitude (ft)
Speed
(KIAS)
Current/Future
Representative UAS (as of 2010)
Group 1
0-20
< 1,200 AGL
100
WASP III, Future Combat System Class I, TACMAV
RQ-14A/B, BUSTER, BATCAM, RQ-11B/C, FPASS, RQ-16A, Pointer
Group 2
2155
< 3,500 AGL
< 250
Vehicle Craft UAS,
Scan-Eagle, Silver Fox, Aerosonde
Group 3
< 1320
< 18,000 MSL
Any airspeed
RQ-7B, RQ-15, STUAS, XPV-1, XPV-2
Group 4
> 1320
MQ-5B, MQ-8B, MQ-1A/B/C, A-160, MQ-8B
Group 5
> 18,000 MSL
MQ-9A, RQ-4, RQ-4N, Global Observer, N-UCAS
Legend AGL BATCAM FPASS KIAS MSL N-UCAS ft lbs STUAS TACMAV > <
above ground level Battlefield Air Targeting Camera Autonomous Micro Air Vehicle Force Protection Airborne Surveillance System knots indicated airspeed mean sea level Navy Unmanned Combat Air System feet pounds Small Tactical Unmanned Aircraft System tactical mini unmanned aerial vehicle greater than less than

## Glossary Section I. Acronyms And Abbreviations

HF . . . . . . . . high frequency HMMWV . . . . . . . . high mobility
multipurpose wheeled vehicle
HST. . . . . . . . . helicopter support team HUMINT  . . . . . . . .human intelligence
ACE  . . . . . . .aviation combat element (MAGTF) AMD . . . . . . . .air mobility division AMS . . . . . . . .acute mountain sickness AMWS . . . . . . . Army Mountain Warfare School ATTP  . . . . . . . . Army tactics,
techniques, and procedures
BCT. . . . . . . . . brigade combat team BFT . . . . . . . . blue force tracking
IED . . . . . . . . improvised explosive device IPB  . . . . . . . . intelligence preparation
of the battlespace
ISB  . . . . . . . .intermediate staging base ISR  . . . . . . . .intelligence, surveillance,
and reconnaissance
JP. . . . . . . . . joint publication JTAC. . . . . . . . .joint terminal attack controller
CAS. . . . . . . . . close air support CASEVAC . . . . . . . . casualty evacuation CCA  . . . . . . . . close combat attack CDS. . . . . . . . . container delivery system COP. . . . . . . . .combat outpost CSS . . . . . . . . combat service support
LAAD . . . . . . . . low altitude air defense LNO  . . . . . . . . liaison officer LOC  . . . . . . . . line of communications LOS. . . . . . . . . line of sight LZ . . . . . . . .landing zone
DASC . . . . . . . . direct air support center DOD . . . . . . . . Department of Defense DSF . . . . . . . . District Stability Framework
DTCS  . . . . . . . . Distributed Tactical
Communications System
EOB  . . . . . . . . electronic order of battle EPLRS  . . . . . . . .enhanced position
location reporting system
ETT . . . . . . . .embedded training team EW/C  . . . . . . . . early warning and control F. . . . . . . . . degrees Fahrenheit FAC. . . . . . . . . forward air controller
FAC(A) . . . . . . . forward air controller (airborne) FARP  . . . . . . forward arming and refueling point FDC. . . . . . . . . fire direction center FM. . . . . . . . . field manual (Army) FOB. . . . . . . . .forward operating base FSR . . . . . . . . First Strike Ration GCE  . . . . . . . ground combat element (MAGTF) GPS  . . . . . . . .Global Positioning System
MACCS  . . . . . . . . Marine air command
and control system
MAGTF  . . . . . . . . Marine air-ground task force MALS . . . . . . . . Marine aviation
logistics squadron
MARFORCENT. . . .United States Marine Corps
Forces, Central Command
MCMWTC . . . . . . . .Marine Corps Mountain
Warfare Training Center
MCRP . . . . . . . . Marine Corps
reference publication
MCWP  . . . . . . . . Marine Corps
warfighting publication
MEDEVAC. . . . . . . . .medical evacuation MET . . . . . . . . meteorological METT-T . . . . . . . . mission, enemy, terrain and
weather, troops and support
available-time available
mm  . . . . . . . .millimeter MOS . . . . . . . . military occupational specialty
MRE . . . . . . . . meal, ready to eat MSR . . . . . . . .main supply route
HACE . . . . . . . . high altitude cerebral edema HAPE . . . . . . . . high altitude pulmonary edema
MTSQ . . . . . . . . mechanical time super quick MUX . . . . . . . . multichannel radio NAVMC . . . . . . . . Navy/Marine Corps
departmental publication
NCF. . . . . . . . .naval construction force NCO . . . . . . . .noncommissioned officer
NWTC. . . . . . . . .Northern Warfare
Training Center (Army)
TACC . . . . . . . . tactical air command center TACSAT. . . . . . . . .tactical satellite TAOC . . . . . . . . tactical air operations center TC . . . . . . . . training circular TCAC . . . . . technical control and analysis center TOE. . . . . . . . . table of equipment TOS. . . . . . . . . time on station TRST. . . . . . . tactical rope suspension technician TTP . . . . . . . . tactics, techniques, and procedures
OEF. . . . . . . . . Operation Enduring Freedom PET . . . . . . . .pre-environmental training PZ . . . . . . . . pickup zone
UAS  . . . . . . . . unmanned aircraft system UHF  . . . . . . . . ultrahigh frequency US . . . . . . . . United States USASOC. . . . . . . . .United States Army,
Special Operations Command
SATCOM . . . . . . . . satellite communications
SCR. . . . . . . . .single-channel radio SIGINT . . . . . . . .signals intelligence SUSV  . . . . . . . . small unit support vehicle
VHF  . . . . . . . . very high frequency VMAQ  . . . . . . . . Marine tactical
electronic warfare squadron

## Section Ii. Terms And Definitions

forces. Logistics is one of the six warfighting functions. (MCRP 5-12C)

maneuverThe movement of forces for the
purpose of gaining an advantage over the enemy.
Maneuver is one of the six warfighting functions.
(MCRP 5-12C)

offensive operationsOperations conducted to
take the initiative from the enemy, gain freedom
of action, and generate effects to achieve objec-
tives. The four types of offensive operations are
movement to contact, attack, exploitation, and
pursuit. (MCRP 5-12C)

combat service supportThe essential capabilities, functions, activities, and tasks necessary to sustain all elements of operating forces in theater at all levels of war. Within the national and theater logistic systems, it includes but is not limited to that support rendered by service forces in ensuring the aspects of supply, maintenance, transportation, health services, and other services required by aviation and ground combat troops to permit those units to accomplish their missions in combat. Combat service support encompasses those activities at all levels of war that produce sustainment to all operating forces on the battlefield. Also called CSS. (JP 1-02)

defensive operationsOperations conducted to
defeat an enemy attack, gain time, economize
forces, and develop conditions favorable to offen-
sive and stability operations. The three types of
defensive maneuver are position, mobile, and
retrograde. (MCRP 5-12C)

stability operationsAn overarching term en-
compassing various military missions, tasks, and
activities conducted outside the United States in
coordination with other instruments of national
power to maintain or reestablish a safe and secure
environment, provide essential government ser-
vices, emergency infrastructure reconstruction,
and humanitarian relief. (JP 1-02)

logistics1. The science of planning and execut-
ing the movement and support of forces. 2. All
activities required to move and sustain military

tempoThe relative speed and rhythm of mili-
tary operations over time with respect to the
enemy. (MCRP 5-12C)

## References And Related Publications Federal Publications

United States Code, Title 10, *Armed Forces*

## Department Of Defense Issuance

Military Detail [MIL-DTL] Specification 85470B
Inhibitor, Icing, Fuel System, High Flash (NATO Code Number S-1745)

## Joint Publication (Jp)

| 1-02   | Department of Defense Dictionary of Military and Associated Terms   |
|--------|---------------------------------------------------------------------|
| 3-09.3 | Close Air Support                                                   |
| 3-30   | Command and Control for Joint Air Operations                        |
| 3-34   | Joint Engineer Operations                                           |

## Navy/Marine Corps Departmental Publications (Navmc)

3500.70A
Mountain Warfare Operations Training and Readiness Manual

## Army Publications

Army Field Manuals (FMs)
2-0
Intelligence
2-19.4
Brigade Combat Team Intelligence Operations
2-22.3
Human Intelligence Collector Operations
3-04.111
Aviation Brigades
3-04.126
Attack Reconnaissance Helicopter Operations
3-04.155
Army Unmanned Aircraft System Operations
3-04.513
Aircraft Recovery Operations
3-05.213
Special Forces Use of Pack Animals
3-07
Stability Operations
3-14
Space in Support of Army Operations
3-21.8
The Infantry Rifle Platoon and Squad
3-21.38
Pathfinder Operations
3-34.170
Engineer Reconnaissance
3-50.1
Army Personnel Recovery
3-55
Information Collection
3-60
The Targeting Process
3-90
Tactics
4-02.1
Army Medical Logistics
4-20.64
Mortuary Affairs Operations
5-19
Composite Risk Management
5-102
Countermobility
| 6-2                                                                | Tactics, Techniques, and Procedures for Field Artillery Survey      |
|--------------------------------------------------------------------|---------------------------------------------------------------------|
| 7-22                                                               | Army Physical Readiness Training                                    |
| 9-207                                                              | Operations and Maintenance of Ordnance Materiel in Cold Weather     |
| 10-52                                                              | Water Supply in Theaters of Operations                              |
| 34-81                                                              | Weather Support for Army Tactical Operations                        |
| Army Regulation (AR)                                               |                                                                     |
| 95-1                                                               | Flight Regulations                                                  |
| Army Techniques Publication (ATP)                                  |                                                                     |
| 3-04.94                                                            | Army Techniques Publication for Forward Arming and Refueling Points |
| Army Tactics, Techniques, and Procedures (ATTP)                    |                                                                     |
| 2-01                                                               | Planning Requirements and Assessing Collection                      |
| 3-18.12                                                            | Air Assault Operations                                              |
| 3-21.50                                                            | Infantry Small-Unit Mountain Operations                             |
| 3-34.80                                                            | Geospatial Engineering                                              |
| 4-02                                                               | Army Health System                                                  |
| Army Training Circulars (TCs)                                      |                                                                     |
| 2-19.63                                                            | Company Intelligence Support Team                                   |
| 3-97.61                                                            | Military Mountaineering                                             |
| Technical Bulletins Medical                                        |                                                                     |
| 505                                                                | Altitude Acclimatization and Illness Management                     |
| 508                                                                | Prevention and Management of Cold-Weather Injuries                  |
| United States Army, Special Operations Command (USASOC) Regulation |                                                                     |
| 350-12                                                             | Special Operations Forces Mountaineering                            |

## Marine Corps Publications

Marine Corps Warfighting Publications (MCWPs)
2-1
Intelligence Operations
2-2
MAGTF Intelligence Collection
2-26
Geographic Intelligence (under development as Geospatial Information and
Intelligence, number remains the same)
3-11.3
Scouting and Patrolling
3-15.2
Tactical Employment of Mortars (under development, supersedes Fleet
Marine Force Manual [FMFM] 6-19, Tactical Employment of Mortars)
3-16
Fire Support Coordination in the Ground Combat Element
3-16.3
Tactics, Techniques, and Procedures for the Field Artillery Cannon Battery
3-16.4
Tactics, Techniques, and Procedures for the Field Artillery Manual
Cannon Gunnery
3-16.7
Marine Artillery Survey Operations
3-17.4
Engineer Reconnaissance
3-17.7
General Engineering
3-17.8
Combined Arms Mobility Operations
3-21.1
Aviation Ground Support
| 3-21.2                                                              | Aviation Logistics                                                          |
|---------------------------------------------------------------------|-----------------------------------------------------------------------------|
| 3-24                                                                | Assault Support                                                             |
| 3-25                                                                | Control of Aircraft and Missiles                                            |
| 3-26                                                                | Air Reconnaissance                                                          |
| 3-33.5                                                              | Counterinsurgency                                                           |
| 3-35.7                                                              | MAGTF Meteorological and Oceanographic Support                              |
| 3-37.4                                                              | Multi-Service Tactics, Techniques, and Procedures for Chemical, Biological, |
| Radiological, and Nuclear Reconnaissance and Surveillance           |                                                                             |
| 3-40.5                                                              | Electronic Warfare                                                          |
| 4-11.1                                                              | Health Service Support Operations                                           |
| 4-11.4                                                              | Maintenance Operations                                                      |
| 4-11.5                                                              | Seabee Operations in the MAGTF                                              |
| 4-11.8                                                              | Services In An Expeditionary Environment (under development)                |
| 4-11.9                                                              | Ammunition Logistics                                                        |
| Marine Corps Reference Publications (MCRPs)                         |                                                                             |
| 2-3A                                                                | Intelligence Preparation of the Battlefield/Battlespace                     |
| 3-02A                                                               | Marine Physical Readiness Training for Combat                               |
| 3-16.1A                                                             | Tactics, Techniques, and Procedures for Field Artillery Target Acquisition  |
| 3-16.6A                                                             | JFIRE Multi-Service Tactics, Techniques, and Procedures for the Joint       |
| Application of Firepower                                            |                                                                             |
| 3-17.2D                                                             | Explosive Hazards Operations                                                |
| 3-35.1A                                                             | Small-Unit Leader's Guide to Cold Weather Operations (under development     |
| as Small Unit Leader's Guide to Mountain Warfare Operations, number |                                                                             |
| remains the same)                                                   |                                                                             |
| 3-35.1B                                                             | Instructor's Guide to Combat Skiing (under development as Mountain          |
| Leader's Guide to Winter Operations, number remains the same)       |                                                                             |
| 3-35.1C                                                             | Mountain Leader's Guide to Mountain Warfare Operations                      |
| (under development)                                                 |                                                                             |
| 3-35.1D                                                             | Cold Region Operations                                                      |
| 3-42.1A                                                             | Multi-Service Tactics, Techniques, and Procedures for Unmanned Aircraft     |
| Systems (UAS)                                                       |                                                                             |
| 4-11.1F                                                             | Multiservice Tactics, Techniques, and Procedures for Health Service Support |
| in a Chemical, Biological, Radiological, and Nuclear Environment    |                                                                             |
| 4-11.4A                                                             | Recovery and Battle Damage Assessment and Repair                            |
| 4-11.8A                                                             | Marine Corps Field Feeding Program                                          |
| 5-12C                                                               | Marine Corps Supplement to the Department of Defense Dictionary of          |
| Military and Associated Terms                                       |                                                                             |
| Marine Corps Interim Publication (MCIP)                             |                                                                             |
| 4-11.01                                                             | Waste Management for Deployed Forces                                        |

Miscellaneous Marine Corps Institute Publication. ORM 1-0, Operational Risk Management. Marine Corps Center for Lessons Learned Reports Marine Corps Intelligence Activity (MCIA) Mid-Range Threat Estimate for 20052015

## Miscellaneous

2010 Quadrennial Defense Review Malik, Muhammad Asim, Major, Pakistan Army. Mountain WarfareThe Need for Specialized Training, *Military Review*. SeptemberOctober 2004.

MMM, Manual of Military Mountaineering (British Royal Marine) UD 6-81E, A Guide to Cold Weather Operations (Norwegian Army)

## To Our Readers

Changes: Readers of this publication are encouraged to submit suggestions and changes to Doctrine Branch via e-mail: doctrine@usmc.mil. Suggestions and changes must include the following information:

- Location of change
Publication number and title Current page number Paragraph number (if applicable) Line number Figure or table number (if applicable)
- Nature of change
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Additional copies: If this publication is not an electronic only distribution, a printed copy may be obtained from Marine Corps Logistics Base, Albany, GA 31704-5001, by following the instructions in MCBul 5600, Marine Corps Doctrinal Publications Status. An electronic copy may be obtained from the United States Marine Corps Doctrine web page: https://homeport.usmc.mil/sites/mcdoctrine/SitePages/Home.aspx