1 September 1920 SS 110 No loss of life During a practice dive from the Boston Navy Yard on the USS S-5 (SS 110) an induction valve failed open and initiated flooding in the Forward Torpedo Room
25 September 1925 SS 162 33 killed 3 survived after a collision with the City of Rome, a Merchant Steamer
WORLD WAR TWO
9 September 1943 SS 209 Grayling 77 killed all hands lost at the time Grayling was patrolling the approaches to Manila, sinking might have been due to engaging with an armed freighter, the Hokuan Maru. Loss included an Army Air Corps passenger.
17 September 1943 SS 181 Pompano 77 killed all hands lost Suspected sinking by enemy mine
28 September 1943 SS 290 Cisco 76 killed all hands lost (pictured) Suspect combined surface and air attack off Mindanao
Pictured SS 162 Built by Topedo Boat Company Bristol, CT