These boats were lost during the month of September.
U.S.S. S5 (SS-110) - Lost on September 1, 1920 when a practice dive went wrong and she sank bow-first, with her stern showing above the water. In a dramatic adventure, her exhausted crew was rescued during the next few days. Salvage attempts were unsuccessful, S-5 settled to the bottom and was abandoned.
U.S.S Grayling (SS-209) - Lost on Sept 9, 1943 with the loss of 76 men near the Tablas Strait. Grayling was on her 8th war patrol and sank two ships before being lost.
U.S.S. S-51 (SS-162) - Lost on Sept 25, 1925 with the loss of 32 men when it was sunk after collision with SS City of Rome off Block Island.
U.S.S. Cisco (SS-290) - Lost on Sept 28, 1943 on her first war patrol with the loss of 76 men in the Sulu Sea west of Mindinao.