The "Molch" (German for "Salamander" or "Newt") was the first midget submarine developed by the Kriegsmarine, with the intention being a single person manned delivery vehicle for a pair of torpedoes. The first Molch was delivered on 12 June 1944, and AG Weser in Bremen would build nearly four hundred (depending on the reference, the number varies from 363 to 393). The electric propulsion system was designed for coastal operations, providing a range of 40 miles at a submerged speed of 5 knots. The complicated trim and dive controls made combat operations hazardous at best for the submariners, and the boats were later relegated to train submariners for using the follow-on, more advanced mini-subs.
Molch midget submarines were used in the Mediterranean in Operation Dragon along the French Riviera on the night of 25 to 26 September 1944 where 10 of 12 boats were lost without damaging a single Allied vessel. Between January and April 1945, Molch and Biber midget submarines tallied one hundred and two missions at the cost of seventy boats being lost, while sinking only seven small allied vessels and damaging another two.