SS311/A16
Serial (013-44)
CONFIDENTIAL

Subject:       U.S.S. ARCHER-FISH(SS311) - REPORT OF FIFTH WAR PATROL
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               (H) ATTACK DATA

     U.S.S. ARCHER-FISH     TORPEDO ATTACK No. 1    PATROL No. 5

     Time:  0317            Date: 11-29-44     Lat. 32 N.    Long. 137 E.

                          TARGET DATA - DAMAGE INFLICTED

     Description:  A task group of one large aircraft carrier and four
                   destroyers was detected by radar at 24,700 yards. The
                   sky was overcast with a bright moon undermeath giving
                    a visibility of about 15,000 yards. Tracking was accomp-
                   lished on the surface and a submerged attack was on
                   the carrier, Hayataka or Taiho class "EC".

     Ship Sunk:    One large aircraft carrier similar to the Hayataka class
                   tonnage approximately 28,000.

     Damage Determined by:
                   Six torpedoes were fired from the bow nest. The first
                   hit was heard and observed just inside the carrier's stern.
                   Second hit was heard and observed about 50 yards forward of
                   the first. Four more properly timed hits were heard while
                   we were going to deep submergence to evade the escorts.
                   Breaking up noises started immediately and continued for
                   47 minutes. Credit is claimed for a sinking because of the
                   following items:
                       (a) Six certain hits (2 observed)
	               (b) Heavy screws stopped and did not restart.
                       (c) Loud breaking up noises for 47 minutes.
                       (d) Escorts gave us slight attention and closed
                           carrier, probably picking up survivors.

     Target draft - 30 feet    Course - 198      Speed - 18  Range - 1400

                              OWN SHIP DATA

     Speed - 3.5       Course  092       Depth   65'   Angle   1° up

                           FIRE CONTROL AND TORPEDO DATA

     Type Attack:  This attack was a combined surface and submerged attack
                   in that the approach phase was made on the surface while
                   the attack phase was made submerged. During the five
                   hour tracking period both plot and the TDC were manned
                   continually, giving excellent results. The data computed
                   by plot of the enemy's base course was very valuable in
                   aiding the "end around". The SJ radar was used both for
                   tracking the target and detection; making a full 360°
                   sweep on the 8000 yard and 40,000 yard scale once every
                   three minutes. The "PPI" scope on the radar was used to

                                          -18-           Enclosure (A)


SS311/A16
Serial (013-44)
CONFIDENTIAL

Subject:       U.S.S. ARCHER-FISH(SS311) - REPORT OF FIFTH WAR PATROL
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

                   good advantage in determining the disposition of the
                   task force. We submerged on the target's track at 11,700
                   yards and sithted him through the periscope at 7000
                   yards. Both sound bearings and periscope bearings were
                   used by the TDC operator in maintaining a correct solution.
                   Throughout the attack the fire control instruments funct-
                   ioned perfectly and the torpedoes ran hot straight and
                   normal.

Tubes Fired        #1          #2         #3          #4          #5      #6

Track Angle        108s        109s       109s        111s        111s    124s
Gyro Angle         28R         31R        33R         38R         40R     55R
Dept Set           10'         10'        10'         10'         10'     10'
Power              Hi          Hi         Hi          Hi          Hi      Hi
Hit or Miss        Hit         Hit        Hit         Hit         Hit     Hit
Erratic            No          No         No          No          No      No
Mk. Torpedo        14-3A       14-3A      14-3A       14-3A       14-3A   14-3A
Serial No.         40009       40267      26405       40553       24373   24363
Mk Exploder	   6-4	       6-4        6-4         6-4         6-4     6-4
Serial No.         12134       19601      19299       2503        19259   19237
Actuation Set      Contact     Contact    Contact     Contact     Contact Contact
Actuation Actual   Contact     Contact    Contact     Contact     Contact Contact
Mark Warhead       16-1        16-1       16-1        16-1        16-1    16-1
Serial No.         12939       17854      14952       16481       14916   20939
Explosive          Torpex      Torpex     Torpex      Torpex      Torpex  Torpex
Firing Interval    0 Sec       8 Sec      8 Sec       8 Sec       8 Sec   25 Sec
Type Spread        Divergent   Divergent  Divergent   Divergent   Divergent Diver-
                                                                            gent.
Sea Conditions     Moderate    Moderate   Moderate    Moderate    Moderate  Moder-
                                                                            ate.
Overhaul Activity  S/M Base    S/M Base   S/M Base    S/M Base    S/M Base S/M Base
                   P.H.        P.H.       P.H         P.H.        P.H.     P.H.







                                           -19-          Enclosure (A)