The Champion Submarine-Killing Submarine of World War Two


Seventh War Patrol

Back to Main

Southeast Coast of Kyushu
June 26, 1945 - August 22, 1945

(A) Prologue
Arrived Pearl Harbor from sixth war patrol on 3 March, 1945. Underwent voyage repairs at Submarine Base and departed Pearl Harbor for San Francisco, California on 6 March, 1945.

Arrived U.S. Naval Drydocks, Hunter's Point, California on 13 March, 1945. Unloaded torpedoes and ammunition. Conducted sound test and commenced yard overhaul at Bethlehem Steel Ship Building Company, San Francisco, California on 14 March, 1945.

The following major alterations and repairs were accomplished:


1. Renewed electrolyte in both batteries because of high nickle content.
2. Overhauled and interchanged port and starboard reduction gears because of pitting prior to this time.
3. Renewed propeller shafts because of excessive pitting.
4. Removed [---] motor generator and installed a 3rd 15 K.V.A. IC motor generator.
5. Installed BuShips type dummy log.
6. Installed Kegron YMS system.
7. Installed Tilefish's #3 main motor when ours could not be rebalanced in time for reinstallation.


1. Installed ST Radar.
2. Installed Loran equipment.
3. Made structural modification for future installation of SV radar.
4. Relocated JP-1 on port side of forward torpedo room and relocated sound training motors on bulkhead of forward torpedo room.
5. Installed JT talkback for JP-1
6. Installed D.C.D.I.
7. Installed local power training for sound heads in forward torpedo room.


1. Installed hydraulic hoist for periscope.
2. Installed a second IMO pump for main hydraulic plant.
3. Altered bowplanes to rig in on 15 dive.
4. Installed discharge snubbers on L.P. blower.
5. Increased size of maneuvering room hard patch.
6. Replaced flanged joints with welded joints in main induction.
7. Sound isolated air conditioning and refrigeration plants.
8. Installed liquidometer gauge in safety tank.
9. Removed air bottles from #4A & B Fuel Ballast Tank.
10. Removed hydraulic plant and trim pump drum controllers and replaced with magnetic type starting controllers.
11. Installed fiber glass insulation over control cubicle.
12. Replaced air condition coils with improved Bureau type.
13. Removed forward fuel oil filling connection.
14. Rearranged Conning Tower sound stacks forward to starboard, SJ aft to starboard, plotting table on after bulkhead. Moved SJ mast aft and removed SD mast relocating it abaft Conning Tower.


1. Modified signal ejector for hydraulic-pneumatic operation.
2. Installed Mk 9 T.B.T. forward on bridge.
3. Modified gun foundation forward to accommodate four or five inch.
4. Modified gun foundation forward and aft on bridge level to accommodate 40mm.
5. Installed ammunition scuttle in crews mess.
6. Installed twin 20mm on after bridge deck.
7. Installed non-shatterable impulse flasks for forward tube next.

On 17 March 1945 Commander J.K. Fyfe was relieved of command by Lt. Comdr. W.L. Small. During the overhaul the following officers reported aboard:
Lt.(jg) H.E. Longfellow, U.S.N.
Lt.(jg) C.A. Sieck, Jr., (DE), U.S.N.R.
and the following officers were detached:
Lt.(jg) W.L. McCann, (DE), U.S.N.R.
Ensign R.H. Pepper, U.S.N.

On 26 May, 1945 completed overhaul and entered the loading period. ON 31 May 1945 departed San Francisco, California for Pearl Harbor.

Conducted training dives and emergency drills enroute Pearl. Arrived on 8 June, 1945, with voyage reparis by U.S.S. EURVALE under the administrative command of Commander Submarine Squadron 18 and Commander Submarine Division 182. Renewed after engine room circulating water sea suction valve and adjusted #2 and #4 main motors for sparking; during overhaul much difficulty had been experienced with these two items. As the reduction gears had been at the maximum allowable noise level of 83 db. at 40 rpm. in San Francisco, conducted additional sound test in Pearl to se if the gears were wearing in as predicted by the experts. Had readings of 89 db. at 40 rpm. and 99 db. at 60 rmp, and we are not too happy about this situation. In addition, had slip rings installed on starboard sound head and installed persistent scope on SD.

On 13 June, 1945 commenced training under Captain C.C. Burlingame, Commander Submarine Division 182, from whom we received several helpful suggestions. Fired eight Mark 14 torpedoes, low power, simulating Mark 18's. Fired six Mark 27's and two Mark 28's. Conducted lifeguard duty and convoy exercises.

On 26 June detached Lt.(jg) H.E. Longfellow, U.S.N. and Ensign D.W. MacEachron (D)L, U.S.N.R. reported aboard. This is also readiness for sea date.

(B) Narrative
Officers and C.P.O's on board:
Lt. Cmdr. W.L. Small, U.S.N. 10
Lt. Clark K. Sprinkle, U.S.N.R. 9
Lt. John W. Ditewig, U.S.N.R. 3
Lt. Gerson I. Berman, U.S.N.R. 5
Lt. Richard H. Walker, U.S.N. 5
Lt.(jg) John L. From, Jr., U.S.N. 6
Lt.(jg) Herman W. Kreis, U.S.N. 6
Lt.(jg) Charles A. Sieck, U.S.N.R. 1
Ensign David W. MacEachron, U.S.N.R. 1
COX, Clifford B., 356 12 70, CMoMM(AA)(T)(SS), U.S.N. 5
LAUGHLIN, David W., 250 49 58, CMoMM(T)(SS), U.S.N. 5
PERSICO, Donato (n), 238 55 59, CTM(AA)(T)(SS), U.S.N. 7
RICKETTS, Ray A., 342 06 76, CEM(T)(SS), U.S.N. 8
SCHLIEF, Marius., 638 46 64, CY(AA)(T)(SS), V6, U.S.N.R. 4
WITTE, Ernest R., 266 45 42, CEM(T)(SS), U.S.N. 7
26 June, 1945
1330(VW) Underway from Submarine Base, Pearl Harbor, enroute Saipan, in compliance with ComSubPacAdCom Op Order 123-A-45. Escorted by PC776.
2030(VW) Released escort.
2211(VW) Commenced end around to avoid friendly carrier and escorts conducting night operations.
27 June, 1945
From here to Saipan conducted daily training dives and drills.
1800(VW) L. 20-52' N. Long. 162-17 W.
28 June, 1945
0932(X) Sighted friendly plane bearing 310 T, distance 14 miles.
1200(X) L. 21-02' N. Long. 168-03 W.
29 June, 1945
1200(Y) L. 21 01' N. Long. 174 03' W.
30 June, 1945
1200(Y) L. 21 10' N. Long. 174 45' W.
1304(Y) Crossed International Date Line.
2 July
1002(M) Sighted friendly AK on easterly course.
1015(M) Sighted friendly AP on easterly course. Made end around to north on both of these ships to avoid detection.
1200(M) L. 21 16'N Long. 174 49' E.
3 July
1200(L) L. 21 12' N. Long. 168 51' E.
1900(L) Changed course to 290 T in an endeavor to contact Jap Hospital Ship headed for Wake and to assist the U.S.S. MURRAY in making contact.
4 July
0300(L) Patrolling across supposed track of Jap Hospital Ship.
0600(L) Having covered all speeds from 13.5 knots to 10.5 knots, proceeded to Saipan feeling that friendly planes would find her for MURRAY anyway. Our navigation is doubtful; no fix for two days.
0725(L) Sighted and exchanged recognition signals with a PBM.
1200(L) L. 21 00' N. Long. 163 25' E.
5 July
1200(L) L. 19 30' N. Long. 158 08' E.
6 July
1200(K) L. 18 31' N. Long. 152 25' E. 
From here all times are KING.
7 July
0701 Sighted two planes at 20 miles, zero angle on the bow, friendly IFF. Attempted to exchange visual recognition signals; no response. With a range of five miles and angle on the bow still zero, dived.
0724 Periscope depth; one plane still hanging around.
0740 All clear; surfaced and proceeded. Sighted several other friendly planes throughout the day.
1140 Sighted Alamagan Is. bearing 270 T. distance 50 miles.
1200 L. 17 32' N. Long. 146 42' E.
8 July
0518 Made rendezvous with escort LCI 222.
1034 Moored alongside U.S.S. ORION for voyage repairs.
10 July
1407 Underway for Lifeguard League under escort of LCI 222, in compliance with ComSubPac Op Order No. 153-45.
11 July
Numerous friendly plane contacts throughout the day.
0945 Passed friendly submarine over the horizon - either LAPON or WHALE.
1200 L. 17 58' N. Long. 143 00' E.
2330 Exchanged IFF and visual recognition signals with a friendly plane. From here all times are ITEM
12 July
1200 L. 21 36' N. Long. 139 43' E.
1252 Sighted PILOTFISH; exchanged recognition signals and chit-chat. Several friendly planes throughout the day.
13 July
0115 Passed RONQUIL headed South, and exchanged recognition via SJ.
0245 Many B-29's passed headed north. Several other friendly planes throughout the day.
0315 Passed SEA DEVIL headed south and exchanged recognition via SJ.
1200 L. 25 52' N. Long. 139 32' E.
1250 Passed friendly submarine headed south; probably the TRUTTA.
1640 Passed U.S.S. CASE headed south and exchanged recognition signals.
14 July
Numerous friendly planes throughout the day.
1200 L. 30 55' N. Long. 139 28' E.
2100 APR signal 157 mc. Everyone knew that it was a Jap sub. Swung ship and struck out on 225 T.
2143 Decided we were headed in reverse direction so came to 045 T.
2337 Swung ship and located radar on Aoga Shima.
2346 Received CSP 141029 and set course for area nine.
15 July
0410 Transmitted BATFISH No. 1 to ComSubPac.
0558 Made dive for B-29 with zero angle on bow, fairly low, at 5 miles.
0626 Sighted ship, closed range to 6,000 yards and identified her as U.S. Submarine, opened range, surfaced and proceeded.
1200 L. 31 09' N. Long 138 00' E.
16 July
1200 L. 29 39' N. Long 131 53' E.
1209 Sighted one man home made wooden boat; passed it about 100 ft abeam; no occupant.
1410 Okinawa based PBM and four fighters were very friendly. They liked to play around and zoom sub after identity was definitely established. It was very hard to make myself stay on the surface.
1532 Received message from plane of man in rubber boat and answered that we would get him. Plane replied that ARGONAUT was also headed for him.
1725 Sighted ARGONAUT who was recovering aviator. Exchanged recognition signals and chit chat, and followed ARGONAUT to rendezvous with QUILLBACK.
2000 Entered area nine.
2115 ARGONAUT transferred aviator to QUILLBACK.
2200 Transferred WASLESKE, V.P., Jr., 868 90 13, Flc, V-6, USNR to QUILLBACK, for transportation to base for treatment; our diagnosis, renal colic, chronic. Received some dope on area.
17 July
Our analysis: "It looks like the zoomies have the area pretty well cleared out, and that it will be a patrol of aviator, planes, mines, and possibly a Jap sub."
0345 Encountered QUILLBACK, he tracked us while we tried to avoid him. It was our fault as we were too far east.
0507 Commenced submerged patrol for voyage repairs on steering, F.O. Purifier, H.P. Air Manifold, #2 Main Engine, I.C. Motor Generator, and one sound head.
0552 The enemy makes his first appearance: One float plane (RUFE) at about four miles.
1200 L. 30 41' N. Long. 129 36' E.
1808 Surfaced.
1907 Sighted one float plane (RUFE) at 7 miles; dived.
1930 Surfaced.
1945 Sighted PBM, 8 miles closing, zero angle on the bow. At 4 miles dived.
2023 Surfaced.
2046 and 2136 SD contacts with IFF.
2225 Exchanged recognition signals with QUILLBACK by SJ.
18 July
0100 Received message of 8 parachutes sighted off China coast. Exchanged information with QUILLBACK. The position is 250 miles from us and 300 miles from her with at least one and possibly three boats closer. Neither of us went over.
0510 SD contact at 14 miles, no IFF.
0539 SD contact at 7 miles, no IFF
1052 Surfaced, patrolling Shanghai, Nagasaki route into 15 miles from Nomo Saki.
1149 SD contact at 11 miles and voice on APR from friendly planes; unable to locate them. It sounds like they are shooting up some small boats, but we can see nothing.
1200 L. 32 01' N. Long. 129 20' E.
1531 Submerged and compensated magnetic compass.
1805 Sighted float plane (RUFE again); perhaps this is a dawn and dusk patrol.
1920 Surfaced. Patrolled Shanghai - Van Diemon route.
2110 SD contact 20 miles.
19 July
A couple more SD contacts throughout the night, not close.
0436 Submerged.
0915 Surfaced on Lifeguard station.
1045 Strike should have ended 15 minutes ago and still no planes. It was no doubt cancelled because of typhoon near Okinawa. Submerged and closed beach.
1200 L. 31 06.5' N. Long. 130 17.5' E.
Whenever we get within 30,000 yards of the beach, Jap radar seems to cut us in continuously, so we decided to try it in close submerged.
1921 Surfaced.
1945 Sighted green flare not far astern; our first thought was "man in a boat". Started reversing course.
1946 SJ contact at 2,000 yards; our next thought "Jap trap". Saw sub surface; it looked friendly, but decided to dive and find out later for he certainly had the drop on us. Tried to challenge by sound - no luck.
2023 Surfaced. SJ interference - exchanged recognition signals with BLACKFISH - closed and exchanged chit-chat. Learned that we had run over him twice yesterday and once today while we were surfaced - most disconcerting; [---] off all lookouts.
20 July
No message from Okinawa; the typhoon should be near there, assumed no strike today and decided to patrol in close.
0443 Submerged.
0915 Came to 43 feet and listened on VHF and Safplan just in case we had missed a message about a strike today.
0940 Periscope depth.
1200 Lat. 31 21.5' N. Long. 130 01' E.
Patrolled about 8,000 yards off Noma Misaki and Bono Misaki. Seas picking up considerably.
1924 Surfaced.
21 July
0212 SD contact 5 miles closing; dived.
0300 Surfaced.
0400 Still nothing from Okinawa and the weather was fine. We wondered if we had missed a message. So opened up and asked; got a negative answer. It would certainly help if we could get the dope on days that there are no strikes so that we would feel free to patrol. As it is we can't get far enough away from our lifeguard station to feel that we are actually patrolling. But perhaps just our presence keeps shipping from coming through here. (See remarks)
0525 Submerged. Patrolled in close to west of Koshiki Retto.
1200 L. 31 33.5' N. Long. 129 42.5' E.
1923 Surfaced, and sighted plane at 5 miles (HELEN). Dived again.
2010 Surfaced.
2105 SD contact at 4 miles; dived.
2139 Surfaced.
2203 Sighted one wake about 10 yards ahead and across bow, and another crossing a little farther ahead - seen by myself, O.O.D., and starboard lookout - probably torpedoes. We were constant helming 80 at the time and turning toward, which made our probable torpedoes miss ahead with a very sharp track. L. 31 24' N. Long. 129 50' E.
22 July
0500 Submerged.
0930 No message from Okinawa last n ight, but as we were submerged for a Helen at the time of the 1930 sked we could possibly have missed it (see remarks), so we surfaced on lifeguard station - nothing going on.
1115 Submerged and closed Kure Shima.
1200 L. 31 00.5' N. Long. 129 56' E.
1918 Surfaced.
2207 SD contact 5 miles - we couldn't see him and guessed he couldn't see us as he opened up.
23 July
Had one hour chit-chat on Safplan with Okinawa trying to get lifeguard dope for today. We feel that their operator missed his calling; he should have been a boiler-maker. About the end of this transmission and at
0145 SD contact at 5 miles; no IFF; opened. This started our diversion for POGY and SENNET for at
0146 At end of above transmission a Jap called BATFISH on 500 Kc. We didn't answer (see remarks).
0214 APR signals on 150 mc. 1100 p.r.f SD contacts at 14 to 1 miles. They played around with us quite a bit between 10 and 12 miles, then with the set up like they wanted it, and at
0228 They started closing fast. With 5 planes at 3 1/2, 4, 4 1/2, 5 and 6 miles we dived deep and zigged radically.
0344 Surfaced.
0601 Submerged.
1015 Surfaced on station for 1030 lifeguard duty.
1046 Sighted floating Mk 6 Mod. 1 Jap mine - exploded same with B.A.R. L. 31 30' N. Long. 129 56' E., about 8 miles from Simo Koshiki Shima. They certainly know we are here.
1145 Strike should have ended - nothing happened; guess it was cancelled.
1200 L. 31 24' N. Long 129 53' E.
1310 Passed empty life raft - tried to sink it, but no luck - it was make of cork.
1500 Looked over Kusahaki Shima from 7 miles while they looked us over. Took pictures of radio station on surface. (More diversion for SENNET and POGY).
1820 Sighted floating type 3, mark 2 Jap mine armed. L. 30 55' N. Long. 129 03' E.
1822 Stopped alongside to sink it when Jap plane (RUFE) appeared at 5 miles. Went ahead; and when stern cleared mine, dived.
1838 Plane out of sight; surfaced to look for mine.
1850 Sighted mine and maneuvered alongside to sink it.
1903 Plane on SD at 6 miles. Sighted him at 5 miles (JILL). Had a repeat performance of last dive as plane closed to 3 miles.
1941 Surfaced but it was too dark to look for the mine again - just made sure that we avoided.
24 July
0215 Exchanged recognition signals with POMFRET by SJ.
0508 Had the dawn patrol on SD at 5 miles.
0553 Sighted and sank aircraft belly tank.
0621 Sighted plane at 3 miles (PETE), dived.
0901 Surfaced.
1200 L. 31 24' N. Long. 130 00' E.
1226 Submerged.
1920 Battle surfaced 3,000 yards off Yaku Shima and shelled village of Nagata. [---] and barracks. Expended 25 rounds of 5" and 128 rounds of 40mm. Upon surfacing there were about 20 people on the beach, but they miraculously vanished before we got off our first salvo. Roughly 90% of the shells landed in the target area and four direct 5" hits were observed, and of which demolished a frame building in the camp area. After about the 10th salvo smoke was so thick that further fall of shot couldn't be observed. This ended our diversion for POGY and SENNET. (Gun Attack No. 1)
25 July
0437 Submerged.
1200 L 31 18' N. Long. 130 00' E.
1923 Surfaced. Headed northwest and patrolled Takao - Sasebo route. Received new communication instructions for Texas League. This will probably solve all our afore-mentioned troubles.
26 July
0457 Submerged and closed Danjo Gunto.
1200 L. 31 59'N. Long. 128 32' E.
1300 Surfaced.
1310 Sighted SEA ROBIN headed for refit. Exchanged recognition signals and chit-chat. She suggested that we patrol Saishu Kaikyo, but we replied that we couldn't get that far from our lifeguard station. If there should be a strike the following day we couldn't get back in time. Also SEA ROBIN left there today, and starting tomorrow the POMFRET will be life guarding just south of the strait. We have been lifeguarding for ten days now and not an air strike yet.
2210 SD contact 5 miles; no IFF; contact opened.
2346 SD contact 5 miles; closing; no IFF; submerged with range 2 1/2 miles on two or more planes.
27 July
0024 At 53 feet for SD check. Four or more planes between 1 1/2 and 4 miles, no IFF. We have been patrolling 8 miles off the beach with several strong land based radars on APR. These Japs don't come out often, but when they get us definitely located, they come in numbers.
0127 Surfaced with SD contacts at 8, 13, and 15 miles. They hung around for about another 15 minutes and then left. Today the POMFRET, SANDLANCE, and SPIKEFISH joined the Texas League. Perhaps this means that we will soon have an air strike.
0450 Submerged and closed Noma Misaki.
1200 L. 31 17.5' N. Long. 130 05' E.
1310 Sighted 3 planes at 6 miles on southerly course; 2 engine land based bombers.
1501 Surfaced.
1548 SD contact; no IFF, closing to 4 miles; dived.
1846 Surfaced.
28 July
0105 SD contact; no IFF; 5 miles, closing; dived.
0137 Surfaced.
0203 Repeat performance of one hour ago.
0218 Surfaced.
0441 SD contact closed to 2 miles; dived.
0957 Surfaced.
1008 Sighted PBM and 8 P-51's; established communications and found out they were our air cover for a strike that is just beginning. To our surprise we learned from them that there have been about 5 to 7 strikes in the last ten days and we have had no dope on any except the ones that were cancelled on 23 July, and 19 July.
1200 L. 31 24' N. Long. 129 53' E.
1300 Our cover departed for base.
1545 SD contact, 5 miles closing; no IFF; dived.
1857 Surfaced.
2029 Sighted 3 searchlights on Kyushu. Patrolling 10,000 yards off Sata Misaki.
29 July
0253 Challenged by one white flash, one green flash and one white flash. We had had several SD contacts, and strong radar steady on us most of the night, but have not dived. It is completely overcast.
0305 Sighted dim red light on Chirin Shima. This was probably cut on so that our challengers could enter Kagoshima Kiawan.
0322 No contact. This means that our challenger was probably a sub and dived. We don't see how he got the drop on us, but he did! We are in a bad spot so we dived too - kept SJ and periscope watch and closed Sata Misaki to 8,000 yards.
0529 Sighted Jap Submarine bearing 113 T. distance 5 miles. His L. 30 59' N. Long. 130 39' E. Full speed, swinging to normal approach course, and manned battle stations.
0530 The clouds have finally burst - visibility 500 yards. The Exec and ST were looking through the number 1 scope. C.O. looking through number 2 and no one could see anything.
0545 Sighted sub rounding Tachimo Saki about 300 yards off beach, angle on bow 180. The time required for this run means that he was making at least 20 knots. After challenging us he must have dived; then at dawn he surfaced, rounded Sata Misaki hugging the beach and heading for the barn at flank speed. We saw him only twice - didn't even get a set up, but we calculate that our closest range was 7,000 yards. (Ship contact #1).
0812 Sighted smoke from Makurazaki - air raid, no doubt.
1105 Surfaced and soon found PBM with 4 P-51's that we believed were our cover - no word on this strike either.
1200 L. 31 04' N. Long. 130 09' E.
1400 Our cover departed.
1515 Intercepted message of three men in water 90 miles south of us. Subsequent messages sounded like a PBM would land and pick them up, but we headed south at flank speed anyway.
1600 (about) B-17 dropped life raft to man.
1800 (about) men are in boat and it looks like PBM cannot land because of increasing wind and seas. told Okinawa we were headed down with our ETA. Many friendly planes, some of which gave us a bad time. Lowered high periscope one to save it from a zooming fighter. This is nerve wrecking.
1945 Dumbo departed position of survivors because of low fuel; we are now 1 1/2 hours away after having been slowed by high wind and heavy sea. We have asked Okinawa if there will be a relief dumbo to orbit survivors who have a light in the boat and flares. Received a negative reply. (See remarks)
2115 Arrived at best given position of survivors. Started search firing green flares every 8,000 yards. Numerous SD contacts throughout the night, and the Japs are jamming 500 Kcs.
2210 Picked up what we believed was Gibson Girl signal, got bearing and headed west toward it. We chased this signal 40 miles and ended up 2 miles south of Akusaki Jima. As we approached the island the signal increased in intensity until it was saturated all around the dial. When we arrived here we lost the signal and didn't hear it again. The Japs no doubt know that the search was on and the theory is advanced that this was intentional deception. Continued search throughout the night firing green Verys every four miles.
30 July
0245 Passing friendly patrol plane assisted in search for one hour.
0740 Playmate 15 arrived on station to assist in search.
0810 PBM located survivors.
0930 In L. 29 28' N. Long 129 53' E. rescued 1st Lieut. Nathan Mangeno, 0-755384; 1st Lieut. James L. Van Epps, 0-702509; and 2nd Lieut. Robert L. Bleicher, 0-833296 of U.S. Army 41st Bomber Group, Squadron 820, Plane 879. Mangeno had fractured or broken ankle and cut tendon in left middle finger. Van Epps had laceration to the bone 8" long 4" wide in left shin. The bone was clean and smooth; no infection; two other bad, but lesser lacerations. Bleicher had sprained back. All three had numerous minor lacerations and bruises, and were suffering from shock and exposure. Survivors stated that they didn't believe other three crew members got out of plane as it was on fire, breaking up and hit the water at 125 knots. Destroyed boat and headed for station.
1200 L. 29 34' N. Long. 129 50' E.
Many friendly planes throughout the day.
1346 Received report of fighter plane down - headed for its position.
1411 Received report that the pilot (only occupant) was definitely dead.
1430 Received report of another downed plane; headed south to its position.
1830 Three to five planes have searched the area for six hours and can't locate any survivors. We did not proceed further as the position is over the line in air surface zone. Made trim dive.
1950 Surfaced and headed north.
31 July
Several planes throughout the night.
0215 Transmitted BATFISH No. 2 to ComSubPac.
0441 Submerged and closed Suwanose Jima. Yesterday we passed here at a range of 10,000 yards on our survivor hunt and thought that we had seen an anchored sea plane and a large sampan.
0530 Got caught in a rip tide and closed the beach to 500 yards, ST says, before we could get control, turn around and head out. Too close!
0645 Nothing here - surfaced to proceed to station. Many friendly planes.
1018 SD contact 5 miles closing, no IFF, dived.
1200 L. 29 31' N. Long. 130 05' E.
1310 Surfaced. Many friendly planes also learned on VHF that some Japs were around.
1615 SD contact, 7 miles, closed to 4, no IFF, dived.
1955 Surfaced.
2055 Sighted two steady white lights on beach of southern Kyushu near Bono Misaki.
2131 SD contacts closed to 4 1/2 miles; APR said that these two were definitely Japs, dived.
2205 Surfaced.
2212 SD and APR had Jap planes at 5 miles. These moved all around and were definitely searching the area.
2218 Sighted beam of searchlight on southern Kyushu near Makurazaki.
1 August
0014 Submerged 10,000 yards west of Sata Misaki, and closed to 6,000 yards for patrol at 42 feet with SJ watch. The Japs must know we are here because we had our plane on SJ practically continuously, and it passed inside of 1,000 yards on many occasions in an hour and a half.
0230 Started opening range.
0350 Surfaced for some fast battery charging.
0615 Transmitted BATFISH No. 3 to ComSubPac.
0715 Submerged.
1039 Surfaced on lifeguard station. The Japs jammed Okinawa badly last night. We have no dope on our cover as we could copy only that part of the message which concerned BATFISH.
1130 B-25 at five miles turned toward and challenged with lights; answered and called frantically on VHF.
1131 Five bombs, beautiful first order detonations, not too close on port beam. We dived - too late. No damage.
1200 L. 31 25' N. Long. 129 51.5' E.
1225 Surfaced. Learned of a few Jap planes on VHF.
1240 Friendly planes on SD at 7 miles. Sky was seven-tenths overcast with 3,000 foot clouds. Nothing in sight. Voices on VHF about a bogey in water. One fellow said "You drop; I'll spot for you." He told Playmate 15 (POMFRET's cover) we had been bombed and that we haven't see our cover.
1259 SD contact 5 miles closing fast, no IFF, inside of 1 mile as we went under. Decided to ride this raid out submerged even though we ought to be up as ComSubPac will probably send dope on treatment of our survivors.
1913 Surfaced; wind and seas mounting.
2220 Received message telling BLACKFISH to take BATFISH's lifeguard station as BATFISH had departed area for Iwo Jima - and we did, at best speed in typhoon.
2 August
0548 Passed floating mine, Jap Mark 6 Mod. 1; too rough to play with it and we felt lucky to miss it by 20 feet. L. 30 25' N. Long. 129 52' E.
0636 Transmitted BATFISH No. 4 to ComSubPac.
1200 L. 29 54' N. Long. 130 48' E.
1234 Passed floating mine, Jap Mark 6 Mod. 1; still too rough to do anything but avoid. L. 29 53' N. Long 131 00' E.
3 August
Master gyro out all day yesterday and all night. We were working on it with conning tower hatch shut and control room lighted.
0400 Master gyro back in commission.
0917 Submerged for trim.
0935 Surfaced.
1200 L. 29 25' N. Long. 136 13' E.
--- Missing pages 14 - 17 of patrol report ---
(C) Weather
Nothing but typical weather as described in sailing directions for the area south and wet of Kyushu was encountered during this patrol. This "typical weather" includes a typhoon which passed on 1-2 August during which time our maximum speed was reduced to 5 knots. The floating mines that were seen, were in every instance encountered during or shortly after periods of rough weather which probably caused them to break their moorings.
(D) Tidal Information
Nothing new can be added on tides or currents around Kyushu. They conformed closely to the information contained on Pilot Charts for July and August, and on H.O. Misc. No. 10058-8.
(E) Navigational Aids
No navigational lights nor other navigational aids were seen during this patrol with the single exception of the dim red light displayed on Chiria Shima, in Kagoshima Kaiwan, on southern Kyushu for the entry of the Jap submarine on 29 July.

The following lights were definitely extinguished:
Sata Misaki L. 30 59' N. Long. 130 40' E.
Bono Misaki L. 31 15' N. Long. 130 13' E.
Tsurikake Saki L. 31 37' N. Long. 129 41' E.
Mi Saki L. 30 24' N. Long. 130 23' E.
(F) Ship Contacts
No. Time-Date Lat.-Long. Type Ship(s) Initial Range
1 0529(I), 20 July Lat. 30 59' N., Long. 130 39' E. Submarine 10,000 yards
Est. Speed-Course How Contacted Remarks
21 knots - 000 T. Periscope, Day - Submerged Lost in rain squall - unable to close for attack or to identify class.
(G) Aircraft Contacts
Usually the Japs made a dawn and dusk sweep over the waters south and west of Kyushu with a single RUFE, and they frequently made thorough night searches of the area with radar equipped planes. During the day friendly aircraft were present in such numbers that the Japs usually didn't get off the ground.
(H) Attack Data
U.S.S. Batfish

Gun Attack No. 1

Patrol No. 7

Time: 1926, Date: 24 July, 1945

Lat. 30 25'15" N., Long. 130 23'52" E.

Target Data - Damage Inflicted.

Damage: One building destroyed, two and possibly more buildings and barbed wire entanglements damaged at Nagata on Yaku Shima. Smoke and haze prevented further observation of fall of shot.
Damage Determined By: Visual observation

Details of Action

Fired 25 rounds 5"/25 type HC with point detonating fuses and 128 rounds 40mm HEIT 0 non SD. The 40mm opened fire on the town, with range 3,500 yards, and put practically all of its shells in the target area. The five inch opened fire on the barracks and camp area at the right end of the beach. One direct hit on barbed wire entanglements and one hint that demolished a frame building in the camp area were observed. Three duds were also seen (these were the Mk. 18-4 fuses). After ten rounds, the smoke and dust was so thick that further fall of shot could not be observed, so the 5" shifted to the town. One direct hit on a building was seen here and after about 9 rounds smoke and dust again prevented spotting, so the 5" shifted back to the camp area which had cleared a little. These last shots all fell directly in the camp with one hit on a building being observed; also one round burst practically on the barracks - it probably exploded by hitting a tree limb directly over the barracks. The average 5" gun range was around 5,000 yards. About 90% of the shells fell within the target area and there were probably several other hits which could not be observed because of the smoke. Spotting was done by high periscope with Spot II on the bridge.
(I) Mines
No mine laying nor sweeping was observed. Only a few floating mines were encountered which had broken their moorings in heavy weather.
(J) Anti-Submarine Measures and Evasive Tactics
On the nights of 22-23 July and 26-27 July we were definitely hunted by an anti-submarine team of 5 and 4 or more planes respectively. On both nights it is fairly certain that the Japs knew our location within a thousand yards. On both nights the planes located us; remained at their extreme radar range until the set up was like they wanted it, and they all closed fast. This is not definite but from SJ information, it is believed that they all came from approximately the same direction, each one being about 1/2 mile behind the one ahead. Perhaps their scheme is to catch the sub unawares and each plane drop charges with increasingly deep depth settings employing both magnetic and radar detectors. We dived deep and changed course radically at high speed. We believe that they didn't drop because we got under before they were close enough to have any assurance of a close pattern.
(K) Major Defects and Damage
Hull and Machinery:

Number one periscope has been so stiff and jerky throughout the entire patrol that it is all but unusable. this periscope is packed with rod type packing as is number two which is the best periscope that any officer on this ship has ever used.

The bathythermograph has been inoperative for the entire patrol, and repairs have been beyond the capacity of the ship's force. There is no registration of temperature whatsoever.

Number two and four main motors spark considerably at speeds above 210 rpm. This sparking has existed ever since overhaul; and is spite of much adjusting and several hours of work, little progress has been made in eliminating the sparking.

The voltage regulator on #3 I.C. motor generator is defective; ship's force is unable to repair and adjust properly.

The master gyro has caused practically continuous trouble for the entire patrol, with, to no avail, several hundred man hours spent on it. Finally,  #2 lighting motor generator speed regulator developed an open circuit. That caused the lighting motor generator to speed up, thereby causing the gyro motor generator to speed up and burn out one rotor phase.

The auxiliary generator armature voltage fluctuates abnormally with load changes, and the field rheostat will not control the generator. This has been investigated by the ORION and thus far the cause is undetermined.

Ordnance and Gunnery:

Eighteen Mark 18-2 torpedoes were carried on this patrol. Routine was carried out as prescribed in "Submarine Force Pacific Fleet Maintenance Instructions for Mk. 18 Torpedoes". No irregularities were encountered except for one ground between the twist lock charging plug in the tail and the fuses of one torpedo.
(L) Radio
Reception of NPM Submarine Fox was satisfactory during the entire patrol. 13655 Kcs. was very good during daylight hours; but from 1700 to 2100 Zebra, as on previous patrols, reception was very difficult. communications on the ship/shore frequencies were very good, and even before the war ended the enemy's jamming efforts did not seem to be up to their previous standards.

The air sea rescue communications left little or nothing to be desired in National League. The same may be said of Texas League after it was effectively organized. Early difficulties are commented upon under (V) REMARKS.
(M) Radar
The SJ radar performed dependably throughout the patrol, with no major casualties other than a leaking modulation network, which was replaced. The ranges obtained were normal but not phenomenal.

The SD radar functioned very poorly between Pearl and Saipan. the antenna was found to have a very low ground reading after submergence due to a porous rubber insulation on the head. The head was renewed in Saipan; the equipment retuned, and the results obtained throughout the remainder of the patrol were excellent. Ranges up to 70 miles were frequently obtained on aircraft.

The ST radar was temperamental, as usual, and kept in operating condition throughout the patrol only by frequent tuning and periodic renewal of crystals, T.B. tube, and beat oscillator. The lack of targets prevented our employing the ST on an approach, but it was used occasionally for navigational purposes.

The IFF was employed extensively throughout the patrol and suffered but one casualty which was a gassy oscillator tube in the BN.

The profusion of Jap radar in the Nansei Shoto and southern Kyushu kept the APR/SPA humming. Early warning aircraft detection radar predominated with airborne Type 4 Air Mark VI Mod. 4 (175/250/10) and Type 3 (155/1000/5) cropping up on frequent occasions to liven things up.
(N) Sonar Gear and Sound Conditions
During this patrol no sound contacts were made except on fish noises and own ship noises. No comment can be made except that the sound gear functioned normally.
(O) Density Layers
The bathythermograph has been out of commission for the entire patrol. There is no registration of temperature whatsoever, and repairs have been beyond the capacity of the ship's force. However it was noted that during the entire patrol, it was necessary to flood in about 6,000 pounds to go from 60 feet to 150 feet; and conversely it was necessary to pump out about 6,000 pounds to go from 150 feet to 60 feet. This data, as does a comparison with maneuvering room injections, indicates about a 10 degree negative gradient between 60 feet and 150 feet south and west of Kyushu during the last two weeks of July, with the same condition existing east of Kyushu during the first two weeks of August. This gradient extended as far as 100 miles west of Kyushu and 50 miles east of Kyushu. Unfortunately we have no bathythermograph cards to bear this out.
(P) Health, Food, and Habitability
The health of the crew was average on this patrol with the usual bruises, minor cuts and burns. The first day on station (16 July) one man, Wasleske, V.P., Jr., Flc, V6, USNR, was transferred to the QUILLBACK for transportation to base because of chronic renal colic. This man was received from Submarine Division 162 in Saipan on 10 July. At that time he had been out of sick bay about four days following a previous renal colic attack.

The food was adequate in quantity and quality, but there was much room for improvement in the manner and quality of preparation.
(Q) Personnel
(a) Number of men detached after last patrol 20
(b) Number of men on board during patrol 74
(c) Number of men qualified at start of patrol 59
(d) Number of men qualified at end of patrol 60
(e) Number of unqualified men making their first patrol 13
The performance of all officers and men was creditable, and the state of training is considered average for the submarine force.
(R) Miles Steamed - Fuel Used
Miles by log Gallons
Pearl to Area 4981 57,800
In Area (including trip to Iwo Jima) 7117 80,170
Area to Pearl 3675 51,100
(S) Duration
Days enroute area 16
Days in area (including one day at Iwo Jima) 33
Days enroute base 12
Days submerged  5
(T) Factors of Endurance Remaining
Torpedoes All
Fuel 50,000 Gals. (at Midway)
Provisions 10 Days
Personnel 5 Days
Note: BATFISH received 64,310 gallons of fuel at Iwo Jima on 5 August.
Limiting factor this patrol: Operation order.
(U) Communications, Radar and Sonar Countermeasures
Radar Countermeasures: (1) Intercept of Enemy Signals:
Date: Time: Freq. PRF. PW. DRAI Position Probable Source


7-13-45 1400 75 500 25 2642'N, 13920'E. Shore Strong; irregular sweeping
7-14-45 2100 157 500 7 3230'N, 13940'E. Shore Strong; sweeping
7-14-45 0102 106 555 25 3224'N, 13829'E. Shore Medium; slow sweeping
7-15-45 2350 180 250 7 2555'N, 13508'E. Plane or Ship Strong; steady
7-16-45 1034 81 500 28 3005'N, 13059'E. Shore Weak; fading
7-16-45 1935 157 500 7 3014'N, 12942'E. Shore Medium; irregular sweeping
7-18-45 0220 98 250 15 3132'N, 12825'E. Shore Medium; sweeping slowly
7-18-45 0345 74 500 25 3130'N, 12835'E. Shore Saturation; sweeping
7-18-45 0515 164 450 6 3136'N, 12953'E. Unknown Medium; fading
7-18-45 1330 160 500 7 3219'N, 129'04'E. Shore Medium; irregular sweeping
7-18-45 1434 150 500 5 3210'N, 12920'E. Shore Medium; steady
7-18-45 1436 155 500 5 3210'N, 12920'E. Shore Medium; steady
7-19-45 0345 74 400 25 3117'N, 12922'E. Shore Saturation; steady
7-19-45 0345 160 500 5 3117'N, 12922'E. Shore Strong; slow sweeping
7-19-45 0345 159 500 8 3117'N, 12922'E. Shore Strong; slow sweeping
7-19-45 1940 65 500 25 3115'N, 13038'E. Shore Saturation; steady
7-19-45 2329 155 1000 8 3114'N, 13040'E. Plane Irregular sweep; keying
7-21-45 2015 160 500 7 3130'N, 12854'E. Shore Saturation; sweeping slowly
7-21-45 2020 157 500 6 3130'N, 12855'E. Shore Saturation; sweeping
7-21-45 2200 102 350 48 3132'N, 12854'E. Shore Strong; slow sweeping
7-22-45 2315 152 1000 7 3104'N, 12951'E. Plane Fading and keying
7-23-45 0136 175 250 6 3108'N, 12824'E. Plane Steady; keying
7-23-45 1210 160 750 25 3104'N, 12753'E. Unknown Medium; slow sweeping
7-24-45 0120 150 1000 8 3104'N, 12810'E. Plane Strong; keying
7-25-45 2400 180 500 8 3123'N, 13257'E. Shore Weak; sweeping
7-26-45 2200 100 350 7 3127'N, 12733'E. Shore Strong; sweeping
7-27-45 1506 160 500 12 3118'N, 12944'E. Shore Satuation; steady
7-28-45 0235 179 250 7 3125'N, 12905'E. Plane Pulsating; medium to strong
7-29-45 0225 150 1000 6 3151'N, 13000'E. Plane Strong; fading and keying
7-30-45 2140 177 250 7 2916'N, 12942'E. Plane Medium; slowly sweeping
7-31-45 2241 176 250 7 3020'N, 12940'E. Plane Strong; steady
8-1-45 0425 159 550 13 3040'N, 12957'E. Unknown Medium; keying
8-1-45 1040 161 500 4 3158'N, 12917'E. Shore Medium; sweeping
8-2-45 0740 138 500 8 3008'N, 13005'E. Shore Medium to strong; sweeping
8-6-45 2400 175 250 7 2727'N, 14045'E. Plane Medium; sweeping erratic
8-8-45 0745 178 200 8 Plane Plane Saturation; steady
8-10-45 0125 178 250 8 Plane Plane Medium; keying and sweeping
8-11-45 0420 175 250 7 3022'N, 14132'E. Plane Plane Strong; in and out
8-14-45 1745 165 550 12 3323'N, 14654'E. Shore Shore Medium; slow sweeping
(V) Remarks
The night before each strike Okinawa usually sent a message at 1930 for which we had to "Roger". Sunset was within a few minutes of 1930 and the Japs frequently had a dusk air patrol which had forced us down several times. It is suggested that this schedule be shifted one hour, in order to make it after dark. The 'receipt' method of sending this message has its disadvantages in that the Japs know a strike is coming on the day after each lifeguard submarine "Rogers" to Okinawa. The Japs jam our Safplan frequencies practically continuously, so that when Okinawa is not having a strike we continuously wonder whether we missed the message, or whether there is no strike. It seems that a practical solution would be for Okinawa to broadcast a message by the "Fox" method twice each night. Then if the lifeguard Texas Leaguers missed a serial they could open up and ask for it. Also on days when there is no strike the submarines would be supplied with this negative information and perhaps they might get in a little patrolling of their own.

On the morning of 23 July, after our one hour discussion with Okinawa, a Jap called the BATFISH on 500 kc using our correct call (610V6). We certainly aren't fooling anyone by giving aircraft calls to the lifeguard submarines. We are called; we answer; we get a message; and we 'roger' - all this is using the plain language call of 610V6, and the Japs know that this is a submarine 15 miles off southern Kyushu. The next day during the strike, we communicate with the planes on VHF using call (codeword - 610); then if CW is used we are "610V6". Wouldn't it be better if Okinawa used encoded calls?

On the night of 25-26 July we received new communication instructions which render the above comments obsolete except for historical interest - all our wishes have been fulfilled.

On 29 July: We do not know the situation on Okinawa and are not criticizing but at 1945 the survivors were definitely located with us 1 1/2 hours away. If this base could possibly have provided a plane to drop a couple of one hour flares for the boat to stay close to, three badly injured and shocked men would have been saved a cold, wet, miserable 12 hours in a boat with a 25 knot wind and force 5 sea.


Torpedoes fired: 0 Number of hits: 0
Ships sunk: 0 Ships sunk (Official): 0
Ships damaged: 0 Ships damaged (Official): 0
Tonnage: 0 Tonnage (Official): 0
Damaged Tonnage: 0 Tonnage (Official): 0
Three aviators rescued
One town shelled with moderate damage
This patrol was designated as successful for the Combat Insignia Award