National Geographic : 1942 Oct
Life on the Hawaii "Front" 555 Official PhotographfI. S. Navy Kaneohe Naval Air Station Men Decorate the Graves of Comrades Killed at Pearl Harbor Wide World from Press Association American Sailors at Pearl Harbor Inspect a Captured Japanese Midget Submarine Since their radius is only 200 miles, such tiny two-man pigboats may have been launched from a mother ship not over 100 miles from Honolulu, before the Pearl Harbor raid. Two torpedoes are carried by these midgets, and some are known also to carry demolition charges. They have no cannon or other guns.