U.S.S. DOLPHIN (SS-169) — war patrol report SS-169_DOLPHIN.pdf

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START OF REEL
JOB NO. [HANDWRITTEN: H-108]
[HANDWRITTEN: AR-179-76]
OPERATOR [HANDWRITTEN: C. MILLER]
DATE [HANDWRITTEN: 1/2/76]

1.0
1.1
1.25
1.4
1.6
1.8
2.0
2.2
2.5
2.8
3.2
3.6
4.0
4.5
5.0

THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[SEAL: DEPARTMENT OF DEFENSE UNITED STATES OF AMERICA]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

REEL TARGET, START & END
NAVEXOS 3968

— page 2 —
Dictionary of

American Naval
Fighting Ships

VOLUME II • 1963

NAVY DEPARTMENT
OFFICE OF THE CHIEF OF NAVAL OPERATIONS
NAVAL HISTORY DIVISION • WASHINGTON

— page 3 —
Dolomi Bay (CVE-65), see Wake Island

Dolomi Bay (CVE-101), see Matanikau

Dolores, Mission, see Mission Dolores (AO-115)

Dolphin

A gregarious aquatic mammal having a pointed muz-
zle, and found in most oceans; also, a swift, spiny-finned
fish having a long dorsal fin and iridescent body, and
found throughout warm seas.

VI

(SS-169: dp. 1,560; l. 319'1"; b. 27'11"; dr. 13'1"; s. 17
k.; cpl. 57; a. 1 4", 6 21" tt.; cl. Dolphin)

The sixth Dolphin (SS-169) bore the name V-7 and
the classification SF-10 and SSC-3 prior to her commis-
sion. She was launched 6 March 1932 by Portsmouth
Navy Yard; sponsored by Mrs. E. D. Toland; and com-
missioned 1 June 1932, Lieutenant J. B. Griggs in com-
mand.

Dolphin sailed from Portsmouth 24 October 1932 for
San Diego arriving 3 December to report to Submarine
Division 12. She served on the west coast, taking part
in tactical exercises and test torpedo firings until 4
March 1933 when she got underway for the east coast.
She arrived at Portsmouth Navy Yard 23 March for
trials and acceptance, remaining there until 1
August.

Dolphin returned to San Diego 25 August 1933 to
rejoin Submarine Division 12. She cruised on the west
coast with occasional voyages to Pearl Harbor, Alaska,
and the Canal Zone for exercises and fleet problems.
On 1 December 1937 Dolphin departed San Diego for
her new home port, Pearl Harbor, arriving a week later.
She continued to operate in fleet problems and training
exercises, visiting the west coast on a cruise from 29
September to 25 October 1940. At Pearl Harbor on 7
December 1941, Dolphin took the attacking enemy planes
under fire, then got underway for a patrol in search of
Japanese submarines in the Hawaiians.

Dolphin departed Pearl Harbor 24 December 1941 on
her first war patrol, during which she reconnoitered in
the Marshall Islands in preparation for later air strikes.
She returned to Pearl Harbor 3 February 1942 to refit
and make repairs, and got underway once more 14 May.
Searching a wide area west of Midway, she patrolled off
the island itself during the critical Battle of Midway
from 3 to 6 June. She put in to the island, saved by the
American victory in battle, for repairs from 8 to 11
June, and a quick overhaul. She then returned to her
patrol, attacking a destroyer and a tanker with un-
determined results before returning to Pearl Harbor 24 July.

Her third war patrol, from 12 October 1942 to 5 De-
cember, was in the storm-tossed waters of the Kurile
Islands, where she performed reconnaissance essential
to the planning of the Aleutian campaign. With
there largely ineffective throughout the war. With
young submarines now available for offensive war
patrols, Dolphin was assigned less dramatic but still
vital service on training duty at Pearl Harbor until
29 January 1944, when she sailed for exercises in the
Canal Zone, and duty as a schoolship at New London,
where she arrived 6 March. She served in this essential
task until the end of the war, then was decommissioned
12 October 1945 at Portsmouth Navy Yard. Dolphin was
sold 26 August 1946.

The second of Dolphin's three war patrols was desig-
nated "successful," and she received two battle stars
for World War II service.

Dolsen, Clara, see Clara Dolsen

Dominant

Ruling or controlling.

236

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[HANDWRITTEN: 1st copy]

FF12-10/A16-5(5) SUBMARINES, PACIFIC FLEET W1
Serial 0142 U.S. Submarine Base,
Pearl Harbor, T. H.,
February 5, 1942
COMSUBF C REPORT No. 8
DOLPHIN FIRST WAR PATROL.
[STAMP: DECLASSIFIED]

From: The Commander Submarines, Pacific Fleet.
To : Submarines, Pacific Fleet.

Subject: U.S.S. DOLPHIN (SS169) - First War Patrol,
Report of.

Enclosure: (A) Copy of Subject Report.
(B) Copy of Comsubron Four's Conf. ltr.
FF12-10(4)/A16-3 Serial 047 of February
5, 1942.
(C) Copy of Comsubdiv Forty-Two's Conf. ltr.
FB-2/A16-3(1) Serial 07 of February
5, 1942.

1. The remarks of the Commander Submarine Division
Forty-Two on this patrol, especially in paragraph 1, state
in a very concise manner the opinions of the Commander Sub-
marines, Pacific Fleet. It is desired to emphasize that the
object of patrol reports is not only to give a record of what
any one particular submarine accomplished, but also by their
dissemination to pass on to other submarines information of
value to them in future patrols. Submarine commanding officers
should have this in mind as the report is being made up.

2. The patrol of the DOLPHIN was a series of ma-
terial casualties, many of which are due to the age of the
vessel and time elapsed since last major overhaul. The
officers and crew are deserving of great credit for keeping
the ship running in the face of so many casualties.

3. As a result of the arrival conference held the
day after the DOLPHIN returned from patrol, the Commander
Submarines, Pacific Fleet, feels that the report of the
DOLPHIN patrol is not a true reflection of the condition of
the ship. This is not to say, however, that the ship does
not require a great deal of work approaching the proportions
of a major overhaul. Arrangements are being made with the
Navy Yard, Pearl Harbor, to undertake these repairs. The
DOLPHIN has had a rigorous schedule for the past three and
one-half months, including a patrol of forty-seven days,
prior to the present patrol, and in view of the age of
material the effect of this schedule has been more telling
than in a newer submarine.

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DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C
[HANDWRITTEN: 40069 BY OP-09B2C DATE 5/26/72]
[STAMP: DECLASSIFIED]

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[HANDWRITTEN: 1/57]

CONFIDENTIAL U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL
Period from December 24, 1941, to February 3, 1942.
Area: East Marshall Islands, Area 21.
Zone Time: Minus 11.

NARRATIVE
This vessel departed Pearl Harbor, T.H., at 0930 (Zone plus
10.5 December 24, 1941 and proceeded through designated point
for the East Marshall Islands patrol area. No incident of note
occurred while enroute.

Much difficulty was experienced with keeping the stern tube
packing in the stern tubes due to packing being rapidly chewed
up. This deficiency rendered this vessel incapable of sub-
mergence on occasions.

When instructions were received to proceed to Area # 21,
the Commanding Officer believed the mission could be furthered
by proceeding south of Mili unless conditions improved instead
of proceeding directly through the channel, thereby reaching
assigned area and observing JALUIT Atoll which was believed to
have been of more importance. In making this decision the
Commanding Officer was influenced by the seriousness of stern
tube leaks, drainage system and leaks in pressure lines and
possible operations in a narrow channel in this condition, by
the fact that another submarine would be entering this area and
by the general condition of the ship - all of which convinced
the Commanding Officer that passage through the channel would
make the ship very susceptible to detection and jeopardize the
mission. In addition, while attempting to raise Base on 4155
kcs. on January 1, at 0325 (Zone minus 11) in order to acknow-
ledge ComTaskFor 7's despatch 300200, our transmission was
reported blocked out by Japanese interference. Further trans-
mission not considered advisable due to possible detection of
approach.

Nothing of incident was noted while proceeding to JALUIT,
except for repairs and the removing of a cylinder head which had
blown grommet on a 32 second dive. At 0030, January 7, on
entering the area, proceeded direct for JALUIT and submerged
when about eleven miles from South Point. During approach, sea
was calm and visibility was good. Observed southwest and south-
east sides of South Point. Many trees made it difficult to
observe the lagoon and it was necessary to find breaks in the
shore line. No activity of any description was noted. The
Island seemed to be well inhabited as many houses and water
tanks were observed. After observing the island for a period
of five hours, withdrew and surfaced at 1907.

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ENCLOSURE (A)

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CONFIDENTIAL U.S.S. DOLPHIN (SS169) REPORT OF [HANDWRITTEN: 5/5]
3rd WAR PATROL

NARRATIVE (Continued)

While observing the island, both main motor circulating water
pump motors grounded due to leaks in main motor circulating
water system. At 1937, sound contact was made 22 miles south-
west of JALUIT, but could not locate target due to exceptional
darkness. Turn counts varying from three to four hundred turns
were given and indicated that target may possibly have been a
fast motor boat. Cleared this vicinity to preserve security,
withdrawing to western part of area to patrol and make repairs.
Developed port list indicating fuel leak.

At 1410, January 9, commenced observation of NAMORICK Atoll.
Nothing of incident noted. At 1944, same day, made sound contact
and attempted approach but unable to locate target. Screws had
a peculiar clicking characteristic.

At 0342, January 12, sighted AILINGLAPALAP Atoll and com-
menced observations, which were conducted at distance of one
mile. No activity of any kind.

On January 13, made sound contact with clicking noise
similar to that previously heard off NAMORICK. Unable to locate
source.

January 14 and 15, observed TRUK Island route.

On January 16, 0605 to 0859, observed AILINGLAPALAP from
distance of 1.5 miles. No activity noted. Sea calm, visibility
good and lagoon was easily observed.

On January 17, 0659 to 0931, observed JALUIT from distance
of one to two miles. No activity noted. At 2256, this date,
again made sound contact with clicking noise southwest of JALUIT.
This is the same sound that has been previously contacted.

On January 18, 0854 to 1155, observed JALUIT from one
thousand yards. Sighted three large merchant ships. Single
stack similar to HAKONE class. Ships appeared to be moored to
docks. Withdrew and attempted to report observation but could
not raise Submarine Base. At 1805, this date, again made
sound contact with clicking noise. Source not determined.

January 19, cleared transmission area and repacked stern
tubes.

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[HANDWRITTEN: [UNCLEAR: 1/5]]
CONFIDENTIAL U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL

NARRATIVE (Continued)

On January 20, 0706 to 1253, observed PINGLAP Island
(JALUIT Atoll) and passage from 500 yards off shore. Sighted
three additional ships for an instant but unable to verify
without going into lagoon.

At 1825, January 21, screws reported making 330 turns.
Unable to locate target which was probably a motorboat.

January 22 made plans for another round of observations,
but due to reported leak in compensating line and other condi-
tions, cancelled these plans and started repairs. Leaks
developed in both the compensating and drainage systems and
due to the serious nature, the Commanding Officer decided to
withdraw temporarily for overhaul. Prepared despatch to send
to Commander Task Force Seven reporting general conditions of
the ship. Previously to this leaks had been developing in
drainage system and were repaired, though at one time it was
necessary to bail the motor room bilges into the engine room
bilge with buckets.

On January 23, at 1830, upon surfacing it was found that
the radio antenna trunk had flooded, the trim pump went out of
commission and a leak was believed to exist in port main engine
exhaust header. Unable to send despatch previously prepared.
At this time received orders from Commander Task Force Seven
to observe MALOELAP Atoll. An antenna was rigged by running
wire from radio room up through the conning tower hatch but
unable to get off message of acknowledgement and inform Com-
mander Task Force Seven that this vessel would be making repairs.
2150 this date, departed for MALOELAP Atolls and proceeded
through channel between ARNO and MALOELAP Atolls. Unable to
observe MALOELAP on time due to one engine and trim pump being
out of commission. Temporarily repaired trim pump and engine.
Trim previously obtained by blowing. Continued in channel to
make ready to observe MALOELAP.

On January 25, at 2033, received orders to depart for
Submarine Base. Surface speed reduced due to engine troubles.

At 1318 (zone minus 12) January 27, heard ranging on JK
while submerged, having changed course to 000°T made observa-
tion but sighted nothing. During this contact the stern planes
were out of commission, both in hand and power. At 1906 pro-
ceeded to return route to Pearl. During ranging ship was
silenced. The ranging appeared to be but as a single searching
vessel rather than the screen of a convoy. This contact was
probably due to fuel leaks and an air leak.

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ENCLOSURE (A)

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[HANDWRITTEN: 5157]
CONFIDENTIAL U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL

NARRATIVE (Continued)

Calls from Commander Task Force Seven could not be answered
due to transmitter trouble and when the transmitter was repaired
difficulty was encountered with this jury rig. This was a very
dangerous rig due to danger from shock and necessity of hauling
antenna down through the conning tower hatch on each dive.
Several dives were made and the antenna was readily pulled through
the hatch.

On February 1, at 1905 (Zone plus 11) sighted one carrier
and two destroyers, Lat. 18° - 26' N, Long. 163° - 49' W.
Submerged, heard ranging, identified carrier as the U.S.S.
LEXINGTON and surfaced when carrier and destroyers were beyond
range of visibility. The night was a clear moonlight one and
it was determined that the carrier was on approximately 240° T
course. Passed within six thousand yards. An attack would
have been easy. To the best of the Commanding Officer's know-
ledge this vessel was not detected.

WEATHER

The weather followed the Coast Pilot very closely. There
was considerable rain and the sea was generally rough. On
many nights the visibility was zero and on moonlight nights it
was almost as bright as day.

TIDAL INFORMATION

Currents were experienced to the northeastward and in some
localities was as much as three knots, particularly in the
passages on the southwest side of JALUIT Atoll. The current
was very similar to that described in the Coast Pilot. While
submerged, unless on the alert, a submarine could easily go
aground near the passages. The sea was very clear at 250 feet.

NAVIGATIONAL AIDS

There were no navigational aids except for rough estimate
tangents. The bubble sextant could not be used due to heavy
rolls. Sights were not obtained for sixty-two hours.
On one occasion sights were not obtained for sixty-two hours.
On approaching islands by D.R., felt out lee and smelled for a
distinct odor of live stock which the islands had.

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ENCLOSURE (A)

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[HANDWRITTEN: L/S]
CONFIDENTIAL
U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL

VESSELS SIGHTED

On January 18, from 0855 to 1155, observed three merchant
vessels near Southeast passage of JALUIT. They appeared to be
moored alongside docks inside the lagoon. They had single
stacks and were similar to the HAKONE class. On January 20
sighted three merchant ships in Southwest passage. No descrip-
tion or information obtained due to briefness of observations.

AIRCRAFT SIGHTED

On December 25, at 0837 (Zone plus 11) sighted one U.S.
PBY plane. At 1711 (Zone plus 11) of the same day, lookout
sighted one plane which was unidentified.

On December 27, at 1711 (Zone plus 11), lookout sighted
one plane which was unidentified.

On December 29, at 1033 (Zone plus 12), lookout sighted
one plane coming in from due west. Not identified. This
plane was probably enemy.

ATTACKS

None

ENEMY A/S MEASURES

Several sound contacts were made with screws that seemed
to be fast motor boats. These boats were never sighted due to
darkness. It was also noted that sound contacts of the "click-
ing noise" type, previously mentioned in this report, were
encountered in the evening at about end of twilight and in the
same localities.

MAJOR DEFECTS NOTED

1. All units need thorough overhaul.

2. Tail shafts should be pulled to determine reason
for repeated failure of stern tube packing.

3. Tail clutches are very noisy at slow speeds. Worn
parts should be renewed and clearances adjusted.

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ENCLOSURE (A)

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CONFIDENTIAL U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL
[HANDWRITTEN: 15/7]
MAJOR DEFECTS NOTED (Continued)

4. Main and generator engine circulating water systems
should be tested and weak sections renewed.

5. All engineering sea valves should have new seats
and new disks. Studs on hull and valve bonnets should be
renewed where necessary.

6. Main bearings for both generators run hot.

7. Crack exists in port main engine clutch.

8. Port outboard exhaust valve leaks.

9. Circulating water lines in motor room should be
completely renewed.

10. Tubes on port main engine evaporator should be
renewed completely.

11. All electrical equipment needs thorough overhaul.

12. Starboard main motor armature has defective insula-
tion. Should be replaced.

13. Several electrical circuits should be completely
rewired.

14. Port main engine circulating water pump motor has
defective armature.

15. Main motor circulating water pumps in motor room
should be raised at least 6 inches off deck to prevent grounds.

16. C&R air compressor motor should be protected from
bilge water.

17. This vessel should be equipped with two trimming
and two drain pumps.

18. This ship should have a wet exhaust to prevent
sparks.

19. Insufficient air conditioning. An additional 3 tons
aft and a redistribution of that forward should be accomplished.

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ENCLOSURE (A)

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CONFIDENTIAL U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL
[HANDWRITTEN: 5/27]
MAJOR DEFECTS NOTED (Continued)

20. A garbage disposal press machine should be installed.

21. The hull vent exhaust stand pipe needs to be raised.

22. It became evident that valves should be placed in
various sections of the compensating line so as to isolate
sections.

23. Valves should be installed, at the bulkheads, in the
gauge lines from the M.B. Tanks.

24. There is a possible leak in #3 N.F.O. Tank.

25. Motor room bilges should be larger and a drain from
the motor room to the engine room should be installed.

26. Entire compensating line needs to be renewed and
tested.

27. Entire drain line needs to be renewed and tested.

28. Battery decks need to be made water-tight.

29. Sea valves need grinding in and there are numerous
weak hull studs.

30. Residual drains from R.F.O. Tanks should be removed
or blanked off.

31. Removal of inboard vents to M.B. Tanks is considered
desirable.

32. #1 Periscope is a 30' periscope. The Commanding
Officer considers it highly desirable to have a longer periscope
installed as this boat has a tendency to broach easily at periscope
depth. Likewise #2 periscope which is a 34' periscope requires
that the boat come to a 47' depth before the antenna can be
exposed. This periscope should also be longer.

33. Torpedo handling and loading gear in both rooms is
entirely unsatisfactory and dangerous to personnel. It is
recommended that a complete new installation be designed and
installed in both of the torpedo rooms.

34. All deck stowage locker covers should be removed
and replaced by decking. All deck access covers should be
bolted down instead of hinged.

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ENCLOSURE (A)

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CONFIDENTIAL
U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL
[HANDWRITTEN: 7567]

MAJOR DEFECTS NOTED (Continued)

35. The ice box refrigeration is unsatisfactory as
only the forward end of the ice box seems to freeze. Also,
this box should have a drain into the pump room bilges. The
drippings from the meat collects in the bottom of the box,
is not accessible for bailing out, and creates a disagreeable
odor.

36. Entire radio installation not satisfactory. Should
be thoroughly overhauled.

37. Sound gear should be thoroughly overhauled and
head replaced.

38. Locate and repair leak in conning tower.

REMARKS

As noted above, much difficulty was experienced in keeping
this vessel on station due to casualties, major and minor.
The leaks, except for the main motor room circulating water
system (which was renewed at the Base but not tested), seemed
to occur rapidly at about the same time. Time was spent patrollir
while making repairs. 8 to 12 hours were required on some repairs
such as removal of cylinder heads, etc. Crew was continually
worn out.

This is the third patrol for this vessel. Many deep dives
had been previously made and were again made on this patrol.
Similar leaks were not previously experienced, except starboard
stern tube which was repacked. The cause of these leaks in
the piping may be attributed to electrolytic action.

This vessel has had a very difficult operating schedule
with very little upkeep. The ship is completely worn out and
badly in need of a thorough overhaul and interim docking.
The DOLPHIN has not been docked, except for a few hours for
bottom cleaning, since May 1, 1941. During this last brief
docking as many sea valves as possible were given attention
and fuel tanks were inspected but not tested. Fuel leaks and
air leaks encountered were serious.

Due to air raid alarms, manning air raid stations, making
ready to go to sea, defueling and fueling again, taking off
and on stores, installing an electric still and air conditioning
plant and making many repairs, this vessel received very little
upkeep between two patrols. After the prior patrol this vessel
was in a very poor condition.

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ENCLOSURE (A)

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CONFIDENTIAL
U.S.S. DOLPHIN (SS169) REPORT OF [HANDWRITTEN: 1/5] 3rd WAR PATROL
REMARKS (Continued)

The officers and crew were not in good condition having
not had time to recover from the last patrol. The officers
and crew worked night and day getting this vessel ready for
sea immediately, after the air raid on December 7. After the
ship was made ready the work was started over again. In spite
of this and in spite of being overworked due to condition
watches and repairs on station, the morale of the crew was good
on this patrol. Prior to leaving port there was such a rush
that little opportunity was left to clean up the ship or give
the officers and crew a rest. The Commanding Officer realized
that an emergency existed and was anxious to get to sea. A
definite date had not been set but all hands were kept busy to
make it possible to meet any date ordered. What was considered
essential work, other than the badly needed upkeep, was com-
pleted on December 24 and the ship went to sea at 0930 on this
day.

The Commanding Officer strongly recommends that this vessel
be given a thorough overhaul and interim docking before she
is sent to sea again. In her present condition this vessel
cannot carry out any mission. The Commanding Officer did not
desire to withdraw but now realizes that it was a necessity,
for if deferred the ship would not have reached port due to
fuel leaks and probably incapable of submerging due to com-
pensating system and lines condition.

On this type of mission a negative tank would be highly
desirable for making observations. This vessel was exposed to
sighting by aircraft for great periods of time while approach-
ing periscope depth from deep submergence.

The Commanding Officer also recommends that all submarines
be given a silencing and oil slick test prior to commencing
a patrol, as well as sufficient time to make a complete inspection
of the condition of the ship, and officers and crew be given at
least four hours rest after ship is cleaned up prior to departure.

NPM Fox schedules were observed on the surface with good
reception at practically all times. When DOLPHIN was about
1,500 miles from Base, NPM's signal became very weak as to be
almost inaudible. This was only point where difficulty with
density layers was experienced. The low frequency receiver
was out of commission from 0100, January 31 to 1030, February
2, preventing reception of NPM.

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CONFIDENTIAL [HANDWRITTEN: 2787]
U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL

REMARKS (Continued)

A watch on the primary frequency 4155 kcs. was maintained
on the surface, reception from the Base being very good practic-
ally all the time. When DOLPHIN was about 1,500 miles from Base
an echo was noticed but reception was possible.

The best time for DOLPHIN's transmission to Base were from
0900 to 1100 GCT. On the return trip the Base could not be
raised during daylight hours. The transmitter did not operate
properly during the patrol and requires a thorough check.
Further difficulty in transmitting was experienced when using
the jury rigged antenna mentioned previously. The transmitter
at one time was out for several days, during which time the
Base called DOLPHIN. This ship was unable to answer.

Sound conditions were not determined. The only opportunity
to test gear was during the first day at sea when a destroyer
escort was with DOLPHIN. Gear functioned properly, bearing and
ranges being taken. Material troubles with sound gear started
on January 12. When this vessel entered port, all sound gear
was out of commission.

In the operating area water temperature on surface averaged
88° F; submerged 83° F. At no time was sound gear able to pick
up own screws while making under two-thirds speed submerged.
This might have been due in part to faulty equipment, but upper
JK, which functioned properly, could not hear them.

From January 24, when antenna trunk flooded, DOLPHIN used
a jury-rigged antenna, running from radio room up through control
room and conning tower hatch to wing antenna on bridge. The
line had to be kept clear of all metal objects the whole length
of transmission line. This was accomplished by using strung
insulators at various points. The line was secured to the wing
antenna in such a fashion that it could be jerked clear immediate-
ly if the boat were forced to dive. This vessel should be equip-
ped with a vertical antenna.

More material trouble than normally should be expected was
encountered on this patrol. This was due in part to the rapid
turn over in radio personnel. (A different group of radiomen
has been aboard for each of the three war patrols made by this
vessel.) Also, there has not been enough time permitted for
proper upkeep since last patrol.

It is recommended that every submarine be provided with a
radio material man.

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[HANDWRITTEN: 057]
CONFIDENTIAL U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL

REMARKS (Continued)

No water layers there apparent and balancing submerged was
accomplished only by almost continual pumping and flooding.
Strong cross currents were encountered on several occasions
that affected the trim while running at dead slow speed (half
switch). It is interesting to note the abnormally large amount
of water that had to be shifted while changing depth. The
average amount of water that had to be flooded in to maintain
a trim going from 140' to 50' was 11,000 pounds and, upon going
deep again, it took an average of 15 minutes to pump out this
additional ballast. A negative tank should be installed on
this vessel.

The habitability of this vessel has been greatly improved
since last patrol by the addition of 6 tons of air condition-
ing, three in the control room and three in the forward battery.
However, more air conditioning is still desirable and a 15 ton
minimum is recommended. The forward and after torpedo rooms
particularly should be air conditioned because due to poor
ventilation and the fact that the hull was ventilated inboard
during entire patrol, it was necessary to run a portable blower
in each of these compartments to keep the air circulated and
the spaces in a small way liveable.

The accumulation of garbage daily in the after end of the
after battery and in the galley flats proved to be a constant
source of discomfort for those members of the crew who have
bunks in that vicinity.

Fresh water from the air conditioning coolers supplied a
ready and much needed source for washing clothes, mattress
covers and for bathing. It is estimated that about 150 gallons
a day were produced from evaporation.

No trouble was experienced in maintaining the supply of
potable and battery water. The va or compression still was
used to make battery water and to maintain the supply of potable
water while on station and the main engine evaporators to main-
tain the fresh water while enroute. In this respect it should
be noted that due to the necessity of having to stop from time
to time, to change speed for sound contacts and to conserve
fuel, it would have been practically impossible to make much
fresh water with the main engine evaporators while the vessel
was on station. Every opportunity to do so was utilized however.

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ENCLOSURE (A)

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[HANDWRITTEN: [7/3]]
CONFIDENTIAL U.S.S. DOLPHIN (SS169) REPORT OF 3rd WAR PATROL

REMARKS (Continued)

The electric still was run for a total of 195 hours and the
output from it dropped off from 40 gallons per hour to 25.
No attempt was made to clean it while underway. The port
main engine evaporator sprung a leak on January 23 and was
out of commission for the remainder of the patrol.

It is believed that, with the addition of another electric
still this vessel will be self sufficient in potable and battery
water for any period of time.

The average battery water consumed per day for the entire
patrol was 80 gallons. While enroute, carrying a float, this
figure was reduced to 60 gallons a day and while on station
became 105 gallons a day.

Fresh water hours were put into effect upon leaving base
and kept in effect for entire patrol. Average fresh water
used per man per day, discounting water from air conditioning,
was 4.1 gallons.

On February 1, when making a contact dive, when final trim
was obtained all auxiliary tanks were dry except forward and
after water round torpedo tanks and forward torpedo compensating
tanks. Total fuel oil on board at this time was 28,000 gallons.
This is the heavy condition of loading. The subject of reballast-
ing this ship has been taken up on several occasions and the
Commanding Officer believes that, since both the light and heavy
conditions have been encountered and will continue to be en-
countered, this is due to variable tanks being too small, a
negative tank should be installed on this vessel.

NOTE

This vessel has steamed over 21,600 engine miles since
July 1, 1941, and has been submerged for a total of 935 hours
during this same period. Most of the upkeep has been held at
sea and there are certain repairs which cannot possibly be
made while underway.

During this patrol this vessel experienced 17 major and 18
minor casualties.

- 12 - ENCLOSURE (A)

— page 18 —
[HANDWRITTEN: D127]
CONFIDENTIAL
U.S.S. DOLPHIN (SS169) - REPORT OF 3rd WAR PATROL

NOTE

When the port main engine circulating water pump motor
threw an armature coil, placing that motor beyond possible
repair, the main propulsion power of the ship was dependent
upon the starboard pump only. Therefore, it was decided to
attempt to place in an operating condition the attached water
pump for the port engine, which had been in as far as can be
determined, out of commission since the trial runs of this
vessel. After two days, this pump was tested and operated
satisfactorily for the remainder of the patrol.

In making periscope observations it was necessary to make
exposures of from one to five minutes using six to eight feet
of periscope which almost broaches this vessel having a 30'
periscope. Observations over 1,000 yards from shore line were
of little value due to trees.

It is probable that fuel leaks were caused by degaussing
cable passing through bulkheads of main ballast tanks and
having cast loose. Degaussing was never completed on this
vessel.

G. B. RAINER,
Lieutenant Commander, U.S.N.,
Commanding.

- 13 - ENCLOSURE (A)

— page 19 —
FF12-10(4)/A16-3
Serial 047
CONFIDENTIAL

SUBMARINE SQUADRON FOUR
U.S.S. ARGONAUT, Flagship
Submarine Base, Pearl Harbor, T.H.

February 5, 1942.

From: The Commander Submarine Squadron Four.
To : The Commander Submarines, Pacific Fleet.

Subject: Comments on DOLPHIN War Patrol.

1. Stern Tube Packing. The difficulty experienced
by the DOLPHIN keeping packing in the stern tubes is in all
probability caused by pitting of the shaft within the stern
tubes. This occurred on the NARWHAL's last patrol, necessita-
ting removal of the tail shafts and taking a cut on the shaft.
This will require the ship to be docked.

2. Fuel Oil Leaks. In the patrol report, possible
oil leaks were mentioned but no oil was actually observed on
the water.

3. All Units. The war patrol report mentioned that
all units need a thorough overhaul. This was supplemented by
a work list for hull and machinery. To accomplish this work
three months at the Navy Yard would be required. One month's
restricted availability has been assigned. The work absolutely
necessary for the DOLPHIN to go to sea will be submitted to the
Navy Yard with the request that they give an estimate as to
time required for essential work.

4. Tail Clutches. The tail clutches are noisy on
the surface due to engine vibration but are quiet when running
submerged. This item should have low priority on the Yard work
list.

5. Piping in General. It would appear that all
piping in the ship had deteriorated during the last patrol.
The fuel oil compensating line developed five leaks in the for-
ward end of the ship. These sections should be replaced. To
renew all the entire system requested would require several
months and it is not deemed essential. The Yard will be re-
quired to test all sections to 165 lbs. hydrostatic pressure
and renew sections that break down.

6. Sea Valves. All sea valves were reported as
requiring new discs and seats. It is impossible to conceive
how all sea valves could have deteriorated to this extent since
the last Navy Yard overhaul, May 15, 1941. A thorough inspec-
tion should be made and those requiring overhaul be done.

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ENCLOSURE (B)

— page 20 —
FF12-10(4)/A16-3
Serial 047
CONFIDENTIAL
Subject: Comments on DOLPHIN War Patrol.

SUBMARINE SQUADRON FOUR
U.S.S. ARGONAUT, Flagship
Submarine Base, Pearl Harbor, T.H.
February 5, 1942.

7. Generator Main Bearings. These bearings were re-
ported as running hot. An investigation as to why they ran hot
and if they wiped will be made.

8. Port Outboard Exhaust. The work list submitted
requested all outboard and inboard exhaust valves on both main
and generator engines be overhauled and that the seats be re-
moved and ground in as necessary. This is a large job and only
those that leak should be attempted during the interim overhaul.

9. Port Main Engine Evaporator. This evaporator
should be removed from the ship and overhauled, and tubes renew-
ed as necessary. The starboard evaporator was overhauled prior
to departure on patrol.

10. Starboard Main Motor Armature. This armature
was repaired by the Base prior to departure of the DOLPHIN on
patrol. The Yard was requested to prepare the new armature
for installation and it will be replaced during this over haul.

11. Electrical Circuits. It is impractical to renew
completely the circuits requested at this time. Portions of
circuits that are grounded out will be renewed.

12. Main Circulating Water Pumps in Motor Room. The
ship requested these pumps be raised at least six inches above
the deck to prevent grounds. This is a small job and can be
accomplished on "not to delay" basis.

13. Trim Pumps and Drain Pumps. Trim pumps and
drain pumps were requested by the ship. In view of the fact
that these pumps can be cross-connected, the Squadron Commander
does not concur. If both pumps should go out of commission
simultaneously, water could still be transferred by blowing,
as a last resort.

14. Wet Exhaust. A supply of circulating water will
be directed into the tail pipe as a temporary measure. New
wet type mufflers are on order and the present shipping date
has been set for March 1, 1942. They will probably be avail-
able upon return from the next patrol.

- 2 -
ENCLOSURE (B)

— page 21 —
FF12-10(4)/A16-3
SUBMARINE SQUADRON FOUR
U.S.S. ARGONAUT, Flagship
Submarine Base, Pearl Harbor, T.H.

Serial 047
February 5, 1942.

CONFIDENTIAL

Subject: Comments on DOLPHIN War Patrol.

— page 22 —
FF12-10(4)/A10-3
Serial 047
CONFIDENTIAL
Subject: Comments on DOLPHIN War Patrol.

SUBMARINE SQUADRON FOUR
U.S.S. ARGONAUT, Flagship
Submarine Base, Pearl Harbor, T.H.

February 5, 1942.

23. Periscopes. The matter of installing a forty-
foot periscope in the DOLPHIN has been taken up with the Bureau
of Ships. It will be necessary to strengthen the periscope
shears before longer periscope can be installed.

24. Torpedo Handling and Loading Gear. An approved
alteration has been issued for new torpedo handling gear and
will be accomplished during this overhaul period at the Navy
Yard.

25. Deck Lockers and Access Covers. Deck locker covers
and access covers will be bolted down or replaced by decking,
whichever seems more practicable during this overhaul. Both
ships boats will be removed and deck covers will be secured
permanently.

26. Ice Box. Present refrigeration system appears to
be unsatisfactory. Necessary alterations will be made to make
it satisfactory before departure from the Yard. It is believed
that the installation of a desk fan or some similar means to
circulate the air will accomplish this. Installation of drains
appears to be desirable and a study of this will be made.

27. Radio Installation. The radio installation will
be overhauled by the Engineering and Repair Department, Sub-
marine Base, and parts renewed, where necessary, with the spare
parts available.

28. Sound Gear. The QC head will be removed while the
ship is in drydock, and the remainder of the sound equipment
will be overhauled by the Base.

29. Leak in Conning Tower. The leak in the conning
tower could not be located by the ship's force while the ship
was at a depth of 250 feet. The Yard will be requested to try
to locate this leak by an air test. As the test pressure of
the conning tower is only ten pounds, it is not expected that
this leak will be located unless all cork is removed.

30. Main and Auxiliary Engines. The work list as sub-
mitted requires practically a complete overhaul of the main and
auxiliary engines. This is a major job and a complete overhaul
does not seem to be necessary at this time. An attempt should

- 4 - ENCLOSURE (B)

— page 23 —
SUBMARINE SQUADRON FOUR
U.S.S. ARGONAUT, Flagship
Submarine Base, Pearl Harbor, T.H.

FF12-10(4)/A16-3
Serial 047
CONFIDENTIAL
Subject: Comments on DOLPHIN War Patrol.
February 5, 1942.

be made to completely overhaul one main engine during each re-
fit period. The engine hours since the last complete overhaul
are as follows:

starboard main engine 1914 hours.
Port main engine 1956 hours.
Starboard generator engine 697 hours.
Port generator engine 873 hours.

The DOLPHIN was at the Navy Yard or had upkeep as follows:

at Navy Yard 3 Feb-15 May, 1941 101 days.
Overhaul at the Submarine Base 48 days.
(This overhaul included the installa-
tion of 2 lighting motor generators,
2 l.p. lub. oil coolers; refrigera-
tion and air condition, and one still.
The period 3-24 Dec. 1941 could not
be fully utilized because of the start
of war. The fact that the ship was
kept ready to get underway most of the
time and that the Base was occupied in
accomplishing those major jobs inter-
fered with the ship's force in carry-
ing out the work necessary for a good
upkeep.)

Interim docking 1 day.

Total upkeep or at Navy Yard 150 days.

31. Prior to DOLPHIN's departure, the fathometer was
overhauled by the Base Radio Repair Shop. All receivers and
transmitters were apparently in good operating condition.

32. The Base Radio Repair Shop is now equipped to
handle most repairs which are required aboard submarines. Per-
sonnel are proficient in finding trouble and repairing it.
Equipment is gradually being assembled in the shop. The pre-
sent policy is to send an overhaul party to the Submarine,
as soon as it returns from patrol, to make inspections and tests
and determine the amount of work which is necessary in order to
put the radio and sound equipment in good operating condition.

- 5 -
ENCLOSURE (B)

— page 24 —
SUBMARINE SQUADRON FOUR
U.S.S. ARGONAUT, Flagship
Submarine Base, Pearl Harbor, T.H.

FF12-10(4)/A16-3

Serial 047
February 5, 1942.

CONFIDENTIAL

Subject: Comments on DOLPHIN war Patrol.

— page 25 —
FB42/A16-3
(1)
Serial (07)

SUBMARINE DIVISION FORTY TWO
U.S.S. NARWHAL, Flagship

Pearl Harbor, T.H.,
5 February 1942.

C-O-N-F-I-D-E-N-T-I-A-L

From: The Commander Submarine Division FORTY-TWO.
To : The Commander Submarines, Pacific Fleet.

Subject: U.S.S. DOLPHIN (SS169( - First War Patrol,
Report of.

1. It is considered that the subject report as
submitted contains very little of value to other submarines
assigned to patrol duty, being largely a description of ma-
terial casualties encountered. It is not indicated when and
under what conditions submerged operations were conducted,
whether previous experience in regard to number of lookouts,
turning of night into day in shipboard routine, reaction of
crew to war operations, etc., had been borne out. It is
realized that an explanation of the certain decisions refer-
ence had to be made to the causative casualty, but it is con-
sidered that the description and listing thereof should have
been confined to the section provided in the instructions
for that purpose.

2. The following specific comment is made cover-
ing certain portions of the report:

(a) The relatively few planes sighted proceeding
to and from station and while on station is noted. There is
no description of two of the three planes sighted.

(b) The peculiar "clicking" noises noted by other
submarines on their sound gear likewise occurred several
times on this patrol, usually during evening twilight. No
explanation of the cause of these is apparent, but in dis-
cussing the matter with various sound operators on this
vessel as well as with others, it developed that similar
sounds have been encountered from the West Coast of the
United States to the mid-Pacific and as far South as Samoa,
and almost invariably during evening or morning twilight,
over a period of several years. It is accordingly believed
to be a natural phenomena and not due to the machinations
of the enemy.

(c) The result of the observation of the Truk
Island route is not stated.

- 1 - ENCLOSURE (C)

— page 28 —
[HANDWRITTEN: 1ST COPY]
COMMANDER IN CHIEF
U.S. FLEET
RECEIVED

FF12-10/A16-3(5) SUBMARINES, PACIFIC FLEET
Serial 0874 Care of Fleet Post Office,
San Francisco, California 17 01
July 30, 1942.
COMSUBPAC PATROL REPORT NO. 49
U.S.S. DOLPHIN - SECOND WAR PATROL
[STAMP: DECLASSIFIED]

From: The Commander Submarines, Pacific Fleet.
To : Submarines, Pacific Fleet.

Subject: U.S.S. DOLPHIN (SS169) - Report of Second
War Patrol.

Enclosure: (A) Copy of subject report.
(B) Copy of Comsubdiv 42 Conf. ltr. FB5-42/
A16-3, Serial 032 of July 27, 1942.
(C) Copy of Comsubron 4 Conf. ltr. FC5-4/
A16-3, Serial 0231 of July 28, 1942.

1. The second war patrol of the U.S.S. DOLPHIN
shows a continuation of some of the troubles experienced on
the first patrol. It is hoped that all vital defects can be
remedied during the present overhaul.

2. It is regretted that aggressive steps were not
taken to insure that the attack on the tanker on July 26 re-
sulted in a definite sinking.
[HANDWRITTEN: Jure]

3. No attempt was made on this patrol to investi-
gate prominent headlands close in to the shore that would prob-
ably be used by ships taking departures, making landfalls and
piloting along the coast.

4. The DOLPHIN is credited with inflicting the
following damage on the enemy:

DAMAGED
1 Tanker - 8000 tons

DISTRIBUTION: (210M-42)
List I, Case 2: P1(5), SSs
Special: EN3(5), EN10(1);
EN28(5); Comsublant(2);
Subschool,NL(8); Cominch(5);
Comsubwespa(2); Combat Intel(1) [STAMP: DECLASSIFIED-ART. C445, OPNAVINST 5510.1C]
[SIGNATURE: E. R. Swinburne]
E. R. SWINBURNE, BY [HANDWRITTEN: OP-09B9C] DATE [HANDWRITTEN: 5/26/72]
Flag Secretary.

[HANDWRITTEN: ..42310] [STAMP: FILMED]

— page 29 —
CONFIDENTIAL
[HANDWRITTEN: [SECOND]]
U.S.S. DOLPHIN - Report of Fourth War Patrol
Period from 14 May 1942 to 24 July 1942.

1. NARRATIVE

May 14, 1942.

     Underway at 0900 (Victor William) in accordance with
     Commander Submarines, Pacific Fleet Operation Order
     No. 50-42. U.S.S. LITCHFIELD escorting until darkness.

1700 Made trim dive, everything satisfactory.

1715 LITCHFIELD dropped two 300 lb. depth charges, range
     675 yards, depth setting 50 feet. DOLPHIN at 50 feet.

May 15, 1942.

0703 (William X-ray) Sighted PBY, exchanged recognition
     signals, had to use flare as plane evidently couldn't
     read Aldis lamp.

May 16, 1942.

0842 (X-ray) Sighted PBY, distance seven miles, was not
     challenged.

1108 (X-ray) Sighted PBY, distance about ten miles, was
     not challenged.

May 17, 1942.

1222 (X-ray) Starboard lookout sighted periscope and feather
     momentarily (Contact #1) bearing 070° relative, dis-
     tance about 400 yards. O.O.D. changed course to left
     to bring stern tubes to bear and increased speed to
     open range. Periscope was again sighted momentarily
     on the starboard quarter, midway of the turn, after
     this brief sighting contact was lost. At first sight-
     ing submarine was apparently on parallel course.
     Sent report to Commander Submarines, Pacific Fleet.

1615 Submerged to allow submarine to overtake us in case
     she was trailing.

1820 Surfaced, nothing sighted.

May 19, 1942.

1422 (X-ray) Exercised gun crew at Battle Surface, fired 10
     rounds of target ammunition from deck gun.

- 1 - ENCLOSURE (A)

— page 31 —
CONFIDENTIAL
Subject: U.S.S. DOLPHIN - [HANDWRITTEN: Secret] Report of Fourth War Patrol.

June 7, 1942.
1700 (Yoke) Received Comtaskfor Seven 080341 directing entry
     Midway to receive fuel and provisions.

June 8, 1942.
0715 Moored port side to U.S.S. CACHALOT at dock, Midway.
     Commenced taking on fuel and provisions. Received
     Comtaskfor Seven 080900 assigning new patrol station.
     Repair force of air station commenced making minor
     repairs. Submarine Base torpedo force commenced
     alterations to war head exploders.

June 11, 1942.
1305 (Yoke) Air raid alarm sounded at air station.
1310 Departed Midway for patrol area.

June 13, 1942.
0405 (Mike) Sighted submarine believed to be U.S.S. POMPANO,
     or of the POMPANO class, changed course to avoid.
0549 Sighted PBY, distance about eight miles. Plane
     approached, exchanged recognition signals.

June 19, 1942.
2000 (Love King) Entered Tokyo 500 mile circle.

June 20, 1942.
1500 (King) Started battery discharge at 6 hour rate.

June 21, 1942.
1124 (King) Starboard steady bearing wiped.

June 22, 1942.
0808 (King) Starboard shaft back in commission.

June 24, 1942.
2210 (Inter) Sighted destroyer coming out of rain squall
     dead astern, distance about 5000 yards (Contact #2)
     on parallel course.

- 3 - ENCLOSURE (A)

— page 34 —
- 6 - ENCLOSURE (A)

CONFIDENTIAL
Subject: U.S.S. DOLPHIN - Report of [HANDWRITTEN: Second] Fourth War Patrol.

— page 35 —
CONFIDENTIAL
Subject: U.S.S. DOLPHIN - Report of Fourth War Patrol.
[HANDWRITTEN: Issued]

July 9, 1942.
1003 (King Inter) Starboard forward main motor bearing
     wiped. Can run on this shaft at 120 rpm (1/3 standard
     speed) without bearing getting too hot.

July 10, 1942.
0912 (King Inter) Put starboard shaft out of commission
     in order to make repairs to starboard forward main
     motor bearing.

July 11, 1942.
1300 (King) Starboard shaft back in commission.

July 15, 1942.
0021 (King Love) Notified Midway of expected time of arrival.

July 18, 1942.
0700 (Yoko) Moored to U.S.S. PLUNGER at dock Midway.
     Received 15,000 gallons fuel oil.
0930 Departed Midway for Pearl.

July 24, 1942.
0550 (Victor William) Joined U.S.S. WARD (DD139), escort.
1215 (Victor William) Entered Pearl Harbor. Moored at
     Submarine Base, Pearl Harbor, T. H.

- 7 - ENCLOSURE (A)

— page 40 —
CONFIDENTIAL
Subject:                                [HANDWRITTEN: Isecas]

U.S.S. DOLPHIN - Report of Fourth War Patrol.

It was difficult to get a time tick on NPM high fre-
quency and for a fourteen day period, went without one.

Last serial sent was DOZEN, last serial received was
OCTAVE. Last message received was 241544 of July.

11. SOUND CONDITIONS
    Sound conditions appeared to be good although the oper-
ators failed to pick up target screws on three occasions.
Pinging on 17-18 kcs. was heard quite frequently although
attempts to ascertain the source was unsuccessful. On sev-
eral occasions screws were heard at night but nothing was
visible. No density layers were noticed.

    QC motor generator failed, as a result QC could not be
used for ranging. The armature will have to be re-wound.

12. HEALTH AND HABITABILITY
    The health of the crew was excellent. Habitability
was poor due to the lack of air-conditioning.

13. FACTORS OF ENDURANCE REMAINING:
    Torpedoes   | Fuel | Provisions (days) | Personnel (days)
    |------||
    15 plus 3   | 9000 | 15                | 3
    in deck tubes

14. What factor of endurance caused ending this patrol?
    Material failure.

- 12 -
ENCLOSURE (A)

— page 41 —
FB5-42/A16-3
Serial (032)

CONFIDENTIAL

From:
To :
Subject:
Reference:

1.
    This patrol covered a period of sixty-seven
days, one of the longest periods on patrol attained by any
of our Pacific Submarines. Unfortunately only ten of these
days were spent in the assigned area the possibilities of
which were not fully developed.

2.
    Consistently low visibility combined with
material casualties to the gyro compass and fathometer
rendered navigation in the area close to shore precarious.
It is felt however that a more determined effort to investi-
gate that portion of the area lying within a mile or two of
the shoreline was indicated, particularly in view of refer-
ence (a) of which the DOLPHIN was a recipient.

3.
    It is noted that a battery discharge at the
six hour rate was made while in waters in which contact with
enemy forces or shipping was to be expected at any time. Had
contact been made at the end of this discharge the DOLPHIN
would neither been able to develop it submerged nor evade
counter-attack by the enemy. Instructions have been given in
the premises.

4.
    In the attempted attack on the destroyer of
25 June it is considered that with the light and visibility
conditions prevailing better results were to be expected by
conducting the approach on the surface and endeavoring to com-
plete the attack from that condition. The same holds for the
attack made on 26 June, even though it was apparently success-
fully completed from periscope depth.

5.
    The material casualties experienced were
discouraging in the face of the thorough overhaul completed
on this vessel just prior to the commencement of the patrol.
It is considered that rather than indicating a condition of

SUBMARINE DIVISION FORTY TWO

Care of Fleet Post Office,
San Francisco, California,
July 27, 1942.

The Commander Submarine Division FORTY-TWO.
The Commander Submarines, Pacific Fleet.
U.S.S. DOLPHIN (SS169) Second War Patrol -
Report of.

(a) Comsubpac confidential despatch 190922
    of May 18, 1942.

- 1 - ENCLOSURE (B)

— page 43 —
FC5-4/A16-3
SUBMARINE SQUADRON FOUR
Serial 0231
28 July 1942.
C-O-N-F-I-D-E-N-T-I-A-L

From: The Commander Submarine Squadron FOUR.
To : The Commander Submarines, Pacific Fleet.

Subject: U.S.S. DOLPHIN - Report of Second War Patrol -
Comments on.

1. The DOLPHIN was away from her base a little over
seventy-one days, three of which were spent at Midway. It is
regretted that more targets could not have been found in such
a long time. Due to the battle of Midway, considerable time
was consumed enroute to station.

2. The Commanding Officer's report is very brief
as to details of the submarine contact on May 17, 1942. If
the object sighted was definitely established as a periscope,
the stern tubes should have been fired using a spread.

3. The age of the DOLPHIN is appreciated. Exper-
ience has shown that submarines 166 to 171 require consider-
able more repairs on return from patrol than the new submarines.
In spite of this these vessels are considered capable of operating
under war conditions and should be retained in active service.

4. FUEL OIL TANKS. The fuel oil tanks were tested
and repaired just prior to her departure on patrol and the oil
leaks are attributed to riveted construction.

5. GROUNDS. The numerous grounds were caused by
the air conditioning system being out of commission most of
the time. The air conditioning system will be completely
overhauled and the joint made tight during the refit period.

6. GYRO COMPASS. Steps are being taken to obtain
a new gyro compass before going to sea again and if they are
not successful the compass will be overhauled.

7. BOW BUOYANCY TANK. Sections of the bow buoyancy
tank were renewed just before going on patrol. Because of the
age of the DOLPHIN the entire tank top will be renewed during
this refit.

8. MAIN SHAFTING. The yard has been requested to

- 1 -
ENCLOSURE (C)

— page 44 —
FC5-4/A16-3
                                                SUBMARINE SQUADRON FOUR
Serial 0231
                                                28 July 1942
C-O-N-F-I-D-E-N-T-I-A-L

Subject:         U.S.S. DOLPHIN - Report of Second War Patrol -
                 Comments.

— page 45 —
[HANDWRITTEN: 6194]
[HANDWRITTEN: 1 096]
FF12-10/A16-3(5)/ SUBMARINE FORCE, PACIFIC FLT Rs
(11)

Serial 01426 Care of Fleet Post Office,
[STAMP: DECLASSIFIED] San Francisco, California,
December 14, 1942.

COMSUBPAC PATROL REPORT NO. 108
U.S.S. DOLPHIN - THIRD WAR PATROL.

From: The Commander Submarine Force,
To : Submarine Force, Pacific Fleet.

Subject: U.S.S. DOLPHIN (SS169) - Report of Third War
Patrol.

Enclosure: (A) Comsubron Four Conf 1st End FC5-4/A16-3
Serial 0388 of December 7, 1942.
(B) Comsubdiv 42 Conf ltr FB5-42/ A16-3 Serial
079 of December 8, 1942.
(C) Copy of subject war patrol.

1. The submarine sighted by the DOLPHIN on December
4, 1942, was the TRIGGER (SS237) enroute to Midway. The only
enemy contact made by the DOLPHIN was the small freighter sighted
on November 13, 1942. In this case, low visibility prevented
sighting in time to permit reaching favorable attack position.

DECLASSIFIED-ART. 0445, OPNAVINST 5510.1C R. H. ENGLISH.
BY [HANDWRITTEN: OP-09R9C] DATE [HANDWRITTEN: 5/26/72]

DISTRIBUTION
(3501-42)
List III: SS.
Special:
Fl(5), EN2(5), Z1(5),
Comsublant (2), X3(1),
Comsubsowespac (2).
[SIGNATURE: E. R. Swinburne]
E. R. SWINBURNE,
Flag Secretary.

[STAMP: DECLASSIFIED]
[STAMP: COMMANDER IN CHIEF U.S. PACIFIC FLEET RECEIVED 1943 JAN 23]

44749 [STAMP: FILMED]

— page 46 —
[HANDWRITTEN: 1 096]

FC5-4/A16-3

Serial 0388

CONFIDENTIAL
FIRST ENDORSEMENT to
USS DOLPHIN Conf. Ltr.
SS169/A16-3, Serial 07,
of December 5, 1942.

SUBMARINE SQUADRON FOUR
Care of Postmaster,
San Francisco, California,
December 7, 1942.

From: The Commander Submarine Squadron FOUR.
To : The Commander Submarine Force, Pacific Fleet.

Subject: U.S.S. DOLPHIN - Report of Third War Patrol -
Period from October 12, 1942 to December 5, 1942 -
Area: Kuril Islands.

1. The third war patrol of the DOLPHIN covered a
period of fifty-five days. It is regretted the area assigned
proved to be so unproductive.

2. The health and morale of the officers and crew
upon their return from patrol was excellent.

3. The material condition of the DOLPHIN is better
than after the previous patrols and a sufficient refit for local
operation will be completed in two weeks.

ENCLOSURE "A"

[HANDWRITTEN: 2]

— page 47 —
FB5-42/A16-3/.
Serial (079(

CONFIDENTIAL

From : The Division Engineer, Submarine Division FORTY-TWO.
To : The Commander Submarine Force, Pacific Fleet.
Via : The Commander Submarine Squadron FOUR.

Subject: U.S.S. DOLPHIN - Third War Patrol, Report of.

1. The following comments on the subject patrol are
considered pertinent and worthy of special mention.

(A) MATERIAL

The material condition of the DOLPHIN at the end of
her third war patrol is considerably better than at the end of
either of the first two, in spite of the fact that the submarine
was in constant rough weather and rode out two severe storms.
This better condition reflects credit on the officers and crew
for constant attention to many small defects in the past which
have been corrected. The submarine should be ready for local
operations within two weeks.

Care of Fleet Post Office;
San Francisco, California,
December 8, 1942.

ENCLOSURE (B)
[HANDWRITTEN: 3]

— page 48 —
CONFIDENTIAL

Subject: U.S.S. DOLPHIN - Report of Third War Patrol
Period from October 12, 1942 to December 5, 1942.

PROLOGUE

Arrived Submarine Base, Pearl Harbor, T. H. on July 24, 1942
from second war patrol. Commenced overhaul at Navy Yard July 27,
1942. Completed overhaul September 2, 1942. Readiness for sea
October 6, 1942. SJ and SD RADAR installed. Depermed and degaussing
gear calibrated; three day training period. Period September 2 to
October 1 repairing major defects and preparing for sea.

[HANDWRITTEN: 4]

— page 61 —
END OF REEL
JOB NO. [HANDWRITTEN: H-108]
[HANDWRITTEN: AR-179-76]

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.45 |||||2.8 |||||2.5
.50
.56 |||||3.2 |||||2.2
.63
.71 |||||3.6 |||||2.0
.80
.90 |||||4.0 |||||1.8

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THIS MICROFILM IS
THE PROPERTY OF
THE UNITED STATES
GOVERNMENT

[SEAL: DEPARTMENT OF DEFENSE, UNITED STATES OF AMERICA]

MICROFILMED BY
NPPSO-NAVAL DISTRICT WASHINGTON
MICROFILM SECTION

D-62254