USS Argonaut (SS-166) was lost on 10 January 1943 with the loss of 84 officers and men when it was sunk off Rabaul near 05 155N 153 50E; (Another location given as 5 40S 152 02E).

USS Swordfish (SS-193) was lost on 12 January 1945 with the loss of 90 officers and men when it was sunk near Yaku Island off Kyushu, water <600’ deep near island: (27 00N 128 40E).

USS S-36 (SS-141) was lost on 20 January 1942 when it was destroyed after grounding on Taka Bakang Reef in Makassar Strait, Indonesia, near Makassar City, the crew were all rescued.

USS S-26 (SS-131) was lost on 24 January 1942 with the loss of 46 officers and men when it was sunk after ramming by USS PC-460 in the Gulf of Panama, 14 Miles West of San Jose Light.

USS Scorpion (SS-278) was lost on 1 February 1944 with the loss of 77 officers and men when it was sunk East China Sea.

USS Barbel (SS-316) was lost on 4 February 1945 with the loss of 81 officers and men when it was sunk in southern entrance to Palawan Passage 7 49.5S 116 47.5SW Palawan

USS Shark (SS-174) was lost on 11 February 1942 with the loss of 59 officers and men when it was sunk East of Menado, Celebes as a result of one of 3 attacks, (11Feb42 E of Menado, 17Feb42 N of Kendari, 21Feb42 E of Kendari)

USS Amberjack (SS-219) was lost on 16 February 1943 with the loss of 72 officers and men when it was sunk off Rabaul; Last contact at 5 05S 152 37E

USS Grayback (SS-208) was lost on 26 February 1944 with the loss of 80 officers and men when it was sunk near 25 47N 128 45E.

USS Trout (SS-202) was lost on 29 February 1944 with the loss of 79 officers and men when it was sunk near 22 40N, 131 45E, middle of Philippines Basin.