Type A Kō-hyōteki-class submarine
The Type A Ko-hyoteki class was a class of Japanese midget submarines (Kō-hyōteki) used during World War II. They had hull numbers but no names. For simplicity, they are most often referred to by the hull number of the mother submarine. Thus, the midget carried by I-16-class submarine was known as I-16's boat, or "I-16tou."
Type A Ko-hyoteki-class submarine, No.19, grounded in the surf on Oʻahu after the attack on Pearl Harbor, December 1941
Japanese Landing ship No.5 carried Type 'C' No.69.
Raising of midget submarine No.18 from Keʻehi Lagoon by USS Current (ARS-22) in 1960
Japanese Type A Midget Submarine recovered in 1960 off Pearl Harbor, Hawaiʻi.
A midget submarine is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to six or nine, with little or no on-board living accommodation. They normally work with mother ships, from which they are launched and recovered and which provide living accommodation for the crew and support staff.
Some 80 Japanese Type D ("Koryu") Midget Submarines in a dry dock at Kure, 19 October 1945
Crew of a British X-class midget submarine, part of the British Pacific Submarine Fleet
German midget submarine Seehund, with a torpedo
An Italian CB-class submarine in the Nikola Tesla Technical Museum in Zagreb, Croatia
