Source: http://ecfr.io/Title-46/pt46.7.171
Timestamp: 2019-12-11 16:53:41
Document Index: 483261660

Matched Legal Cases: ['art 171', 'art 171', 'art 171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', '§171', 'art 178', 'art 179', '§171', '§70', 'art 51', '§171', '§171', '§170', '§171', '§170', '§171', '§171', '§75', '§171', '§170', '§171', '§171', '§171', '§75', '§171', '§171', '§171', '§171', '§171', '§171']

[46 CFR 171] Title 46 Part 171 : Code of Federal Regulations ';
Title 46 Part 171
Title 46 → Chapter I → Subchapter S → Part 171
§171.001 Applicability.
§171.010 Definitions.
§171.012 Incorporation by reference.
§171.015 Location of margin line.
§171.017 One and two compartment standards of flooding.
§171.045 Weight of passengers and crew.
§171.050 Passenger heel requirements for a mechanically propelled or a non-self propelled vessel.
§171.052 Passenger heel requirements for pontoon vessels.
§171.055 Intact stability requirements for a monohull sailing vessel or a monohull auxiliary sailing vessel.
§171.057 Intact stability requirements for a sailing catamaran.
§171.060 Watertight subdivision: General.
§171.085 Collision bulkhead.
§171.110 Specific applicability.
§171.111 Penetrations and openings in watertight bulkheads in vessels of 100 gross tons or more.
§171.112 Watertight door openings.
§171.113 Trunks.
§171.114 Penetrations and openings in watertight bulkheads in a vessel less than a 100 gross tons.
§171.115 Specific applicability.
§171.116 Port lights.
§171.117 Dead covers.
§171.118 Automatic ventilators and side ports.
§171.119 Openings below the weather deck in the side of a vessel less than 100 gross tons.
§171.120 Specific applicability.
§171.122 Watertight integrity above the margin line in a vessel of 100 gross tons or more.
§171.124 Watertight integrity above the margin line in a vessel less than 100 gross tons.
§171.130 Specific applicability.
§171.135 Weather deck drainage on a vessel of 100 gross tons or more.
§171.140 Drainage of a flush deck vessel.
§171.145 Drainage of a vessel with a cockpit.
§171.150 Drainage of a vessel with a well deck.
§171.155 Drainage of an open boat.
Source: CGD 79-023, 48 FR 51017, Nov. 4, 1983, unless otherwise noted.
(a) Except as provided in paragraph (d) of this section, this part applies to passenger vessels inspected under subchapter K or H of this chapter, or a passenger vessel the stability of which is questioned by the Officer in Charge, Marine Inspection (OCMI).
(c) Specific sections of this part may also apply to a small passenger vessel inspected under subchapter T of this chapter. The specific sections are listed in subparts B and C of part 178 of this chapter and in subpart B of part 179 of this chapter.
(d) Unless permitted otherwise, a passenger vessel constructed on or after January 1, 2009, and issued a SOLAS Passenger Ship Safety Certificate must meet the applicable requirements of IMO Res. MSC.216(82) (incorporated by reference, see §171.012), instead of the requirements of this part. For the purposes of this section, the applicable requirements of IMO Res. MSC.216(82) are equivalent to the requirements of this part when applied to such vessels.
[CGD 79-023, 48 FR 51017, Nov. 4, 1983, as amended by CGD 83-005, 51 FR 923, Jan. 9, 1986; CGD 95-012, 60 FR 48052, Sept. 18, 1995; 60 FR 50120, Sept. 28, 1995; CGD 85-080, 61 FR 944, Jan. 10, 1996; USCG-2007-0030, 75 FR 78084, Dec. 14, 2010]
(h) International voyage has the same meaning provided for the term in §70.05-10 of this chapter.
[CGD 79-023, 48 FR 51017, Nov. 4, 1983, as amended by CGD 85-080, 61 FR 944, Jan. 10, 1996]
(a) Certain material is incorporated by reference into this part with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. To enforce any edition other than that specified in this section, the Coast Guard must publish a notice of change in the Federal Register and the material must be available to the public. All approved material is available for inspection at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030 or go to http://www.archives.gov/federal__register/code__of__federal__regulations/ibr__locations.html. It is also available for inspection at the Coast Guard Headquarters. Contact Commandant (CG-ENG-2), Attn: Naval Architecture Division, U.S. Coast Guard Stop 7509, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7509. The material is also available from the source listed in paragraph (b) of this section.
(1) Resolution MSC.216(82), Amendments to the International Convention for the Safety of Life At Sea, 1974, As Amended (IMO Res. MSC.216(82), Adopted on 8 December 2006, incorporation by reference (IBR) approved for §§171.001 and 171.080.
(2) Resolution MSC 267(85), Adoption of the International Code on Intact Stability, 2008 (2008 IS Code), Adopted on 4 December 2008, IBR approved for §171.050.
[USCG-2007-0030, 75 FR 78085, Dec. 14, 2010, as amended by USCG-2012-0832, 77 FR 59788, Oct. 1, 2012; USCG-2013-0671, 78 FR 60163, Sept. 30, 2013]
(a) This section applies to each vessel, regardless of when constructed.
(b) Compliance with the intact stability requirements applicable to each vessel, using a total weight of passengers and crew carried, is based upon an Assumed Average Weight per Person, which is determined in accordance with §170.090 of this chapter.
[USCG-2007-0030, 75 FR 78085, Dec. 14, 2010]
(a) Each mechanically propelled or non-self propelled vessel other than a pontoon vessel must be shown by design calculations, in each condition of loading and operation, to have a metacentric height (GM) in feet (meters) of not less than the value given by the following equation:
GM = [(W/Δ)( 2⁄3 )(b)]/(tan(T))
Δ = displacement of the vessel in long (metric) tons.
W = total weight in long (metric) tons of persons other than required crew, including personal effects of those persons expected to be carried on the vessel.
T = 14 degrees or the angle of heel at which the deck edge is first submerged, whichever is less; and
b = distance in feet (meters) from the centerline of the vessel to the geometric center of the passenger deck on one side of the centerline.
(b) The criteria specified in paragraph (a) of this section are limited in application to the conditions of loading and operation of vessels for which the righting arm (GZ) at the angle (T), calculated after the vessel is permitted to trim free until the trimming moment is zero, is not less than the minimum metacentric height (GM) calculated in paragraph (a) of this section multiplied by sin(T). In conditions not meeting this requirement, the Coast Guard Marine Safety Center requires calculations in addition to those in this section.
(c) A vessel that complies with the requirements for passenger ships contained in the International Code of Intact Stability, 2008 (2008 IS Code) (incorporated by reference, see §171.012) need not comply with paragraphs (a) or (b) of this section. Vessels complying with the 2008 IS Code must use the Assumed Average Weight per Person obtained according to §170.090 of this title to be exempt from the other requirements of this section.
(a) Each pontoon vessel, in each condition of loading and operation, must have an area under the righting arm curve from the angle of equilibrium to an angle of 40 degrees, the downflooding angle, or the angle of the maximum righting arm, whichever is less, of at least:
(1) For operation on exposed or partially protected waters—
(i) 10 foot-degrees with a crowding density of 5 square feet per person (2.15 persons per square meter); and
(ii) 7 foot-degrees with a crowding density of 2 square feet per person (5.38 persons per square meter); and
(2) For operation on protected waters—
(i) 5 foot-degrees with a crowding density of 5 square feet per person (2.15 persons per square meter); and
(ii) 2 foot-degrees with a crowding density of 2 square feet per person (5.38 persons per square meter).
(b) When assessing compliance with the criteria of this section, passengers are assumed to be distributed in all areas accessible to passengers so as to produce the most unfavorable combination of heel and trim.
X = 1.0 long tons/sq. ft. (10.9 metric tons/sq. meter).
Y = 1.1 long tons/sq. ft. (12.0 metric tons/sq. meter).
Z = 1.25 long tons/sq. ft. (13.7 metric tons/sq. meter).
X = 1.5 long tons/sq. ft. (16.4 metric tons/sq. meter).
Y = 1.7 long tons/sq. ft. (18.6 metric tons/sq. meter).
Z = 1.9 long tons/sq. ft. (20.8 metric tons/sq. meter).
A = the projected lateral area or silhouette in square feet (meters) of the portion of the vessel above the waterline computed with all sail set and trimmed flat. Sail overlap areas need not be included except parachute type spinnakers which are to be added regardless of overlap.
W = the displacement of the vessel in long (metric) tons.
HZ = HZA cos2 (T)
HZ = heeling arm.
HZA = heeling arm at 0 degrees of heel.
HZ = HZB cos2 (T)
HZB = heeling arm at 0 degrees of heel.
HZ = HZC cos2 (T)
HZC = heeling arm at 0 degrees of heel.
I = the area under the righting arm curve to—
T = the downflooding angle or 60 degrees, whichever is less, when computing HZB or 90 degrees when computing HZC.
B = the distance between hull centerlines in meters (feet).
As = the maximum sail area in square meters (square feet).
Hc = the height of the center of effort of the sail area above the deck, in meters (feet).
W = the total displacement of the vessel, in kilograms (pounds).
X = 4.88 kilograms/square meter (1.0 pounds/square foot).
X = 7.32 kilograms/square meter (1.5 pounds/square foot).
[CGD 79-023, 48 FR 51017, Nov. 4, 1983, as amended by CGD 83-005, 51 FR 924, Jan. 9, 1986; CGD 85-080, 61 FR 944, Jan. 10, 1996]
(a) Each of the following vessels must be shown by design calculations to comply with the requirements in §§171.065 through 171.068 for Type I subdivision:
(floodable length) × (factor of subdivision)
P1 = the smaller of the following:
N = the total number of passengers; and
L = LBP in feet (meters).
FS = the factor of subdivision.
CN = 60((M + 2P)/V) + 30000(N/L2)
A = (190/(L−160)) + 0.18
B = (94/(L−85)) + 0.18
F1 = A−((A−B)(CN−23)/100)
S = (10904−25L)/48
F2 = 1−((1−B)(CN−S)/(123−S))
L = the length of the vessel (LBP) in feet.
M = the sum of the volume of the machinery space and the volumes of any fuel tanks which are located above the inner bottom forward or aft of the machinery space in cubic feet.
P = the volume of passenger spaces below the margin line.
V = the volume of the vessel below the margin line.
N = the number of passengers that the vessel is to be certificated to carry.
CN = 60((M + 2P)/V) + 2787(N/L2)
A = (58/(L-49)) + 0.18
B = (29/(L-26)) + 0.18
S = (3323.5−25L)/14.6
L = the length of the vessel (LBP) in meters.
M = the sum of the volume of the machinery space and the volumes of any fuel tanks which are located above the inner bottom forward or aft of the machinery space in cubic meters.
(d) When calculating permeability, the total volume of the ‘tween deck spaces between two adjacent main transverse watertight bulkheads that contains any passenger or crew space must be regarded as passenger space volume, except that the volume of any space that is completely enclosed in steel bulkheads and is not a crew or passenger space may be excluded.
Machinery space 85 + _____
Volume forward of machinery space 63 + ___
Volume aft of machinery space 63 + ___
a = volume below the margin line of all spaces that, in the full load condition, normally contain no cargo, baggage, stores, provisions, or mail.
c = volume below the margin line of the cargo, stores, provisions, or mail spaces within the limits of the machinery space.
v = total volume below the margin line.
(a) The calculations done to demonstrate compliance with §171.065 for a vessel that makes short international voyages and is permitted under §75.10-10 of this chapter to carry a number of persons on board in excess of the lifeboat capacity must—
Machinery Space 85 + ____
b = volume below the margin line and above the tops of floors, inner bottoms, or peak tanks of coal or oil fuel bunkers, chain lockers, fresh water tanks, and of all spaces that, in the full load condition, normally contain stores, baggage, mail, cargo, or provisions. If cargo holds are not occupied by cargo, no part of the cargo space is to be included in this volume.
(1) Unless otherwise permitted, if the LBP of the vessel is 143 feet (43.5 meters) or more, or the vessel makes international voyages, each main transverse watertight bulkhead must be at least 10 feet (3 meters) plus 3 percent of the vessel's LBP from—
801 to 1000 All of the vessel forward of the first MTWB that is aft of a point 60% of the vessel's LBP aft of the forward perpendicular 2
When doing calculations to show compliance with §171.070, the following uniform average permeabilities must be assumed:
C = 1.00 for vessels on exposed waters, oceans, or Great Lakes winter;
C = 0.75 for vessels on partially protected waters or Great Lakes summer;
C = 0.50 for vessels on protected waters;
Δ = intact displacement; and
Heeling moment = greatest of the heeling moments as calculated in paragraphs (f)(4) (i) through (iv) of this section.
Passenger Heeling Moment = 0.5 (n w b)
n = number of passengers;
b = distance from the centerline of the vessel to the geometric center on one side of the centerline of the passenger deck used to leave the vessel in case of flooding.
(A) The weight of each passenger is the weight used for calculations as determined in accordance with §170.090(c) of this chapter;
A≥0.0025(θ−1)
A = Area required in m-rad under each righting-arm curve measured from the angle of equilibrium to the smaller of either the angle at which downflooding occurs or the angle of vanishing stability.
θ = actual angle of equilibrium in degrees
(g) Damage survival for vessels constructed before January 1 2009 authorized to carry more than 12 passengers on an international voyage requiring a SOLAS Passenger Ship Safety Certificate. A vessel is presumed to survive assumed damage if it is shown by calculations to comply with the damage stability required for that vessel by the International Convention for the Safety of Life at Sea, 1974, as amended, the applicable regulations of IMO Res. MSC.216(82) (incorporated by reference, see §171.012).
(2) Equalization on vessels under 150 gross tons in ocean service and on all vessels in other than ocean service must meet the following:
Transverse penetration3 4
1W,X,Y, and Z are determined from Table 171.080(b).
2L = LBP of the vessel in feet (meters).
3B = the beam of the vessel in feet (meters) measured at or below the deepest subdivision load line as defined in §171.010(b) except that, when doing calculations for a vessel that operates only on inland waters or a ferry vessel, B may be taken as the mean of the maximum beam on the bulkhead deck and the maximum beam at the deepest subdivision load line.
4The transverse penetration is applied inboard from the side of the vessel, at right angles to the centerline, at the level of the deepest subdivision load line.
5.1L or 6 feet (1.8 meters) whichever is greater for vessels described in §171.070(e)(2).
(d) If a vessel has two or less shaft tunnels, only one door is permitted between them and the machinery space. If a vessel has more than two shaft tunnels, only two doors are permitted between them and the machinery space.
D = 18.0 + 0.05(L) inches
D = 45.7 + 0.417(L) centimeters
D = the depth at the centerline in inches (centimeters).
(3) The vessel is permitted by §75.10-10 of this chapter to carry a number of passengers in excess of the lifeboat capacity.
[CGD 79-023, 48 FR 51017, Nov. 4, 1983, as amended by CGD 88-070, 53 FR 34532, Sept. 7, 1988]
[CGD 79-023, 48 FR 51017, Nov. 4, 1983, as amended by CGD 85-080, 61 FR 945, Jan. 10, 1996; 62 FR 51353, Sept. 30, 1997]
(2) The penetration must not be located outboard from the centerline more than 1⁄4 of the beam of the vessel measured—
[CGD 85-080, 62 FR 51353, Sept. 30, 1997]
(2) Has its lowest point 21⁄2 percent of the beam of the vessel above the deepest subdivision load line.
(ii) Has its lowest point at a height of 12 feet (3.66 meters) plus 21⁄2 percent of the beam of the vessel above the deepest subdivision load line.
[CGD 85-080, 62 FR 51354, Sept. 30, 1997]
[CGD 79-023, 48 FR 51017, Nov. 4, 1983, as amended by CGD 85-080, 61 FR 945, Jan. 10, 1996; 62 FR 51354, Sept. 30, 1997]
A = 0.1(D) square inches.
A = 6.94(D) square centimeters.
(i) The intact stability requirements of §171.030 or §171.050 and §171.170.
(ii) The subdivision requirements of §171.040, §171.043, or §171.070.
Freeing port area1 2
2In square inches per foot (square centimeters per meter) of bulwark length in the after 2⁄3 of the vessel.
[CGD 85-080, 62 FR 51355, Sept. 30, 1997]