USS S-40 (SS-145) was a first-group S-class submarine of the United States Navy.
USS S-40 in the 1930s, probably in the East Asia.
S-40 alongside submarine rescue vessel USS Pigeon (ASR-6) at Shanghai, China, in 1932.
USS Canopus (ID-4352-A/AS-9) was a submarine tender in the United States Navy, named for the star Canopus.
USS Canopus (AS-9) off Shanghai, China, prior to World War II.
Canopus with all six members of Submarine Division 17 in Apra Harbor, Guam, October 1924
USS Canopus (AS-9) in 1932 with S-37; S-40; S-36; S-38; S-41; S-39 at Cavite