The German torpedo boat T18 was one of nine Type 37 torpedo boats built for the Kriegsmarine during World War II. Completed in mid-1941, she was later assigned to the Baltic Sea for convoy escort duties. The boat briefly became a training ship in 1942 before she was transferred to France where she laid minefields and escorted Axis blockade runners and U-boats through the Bay of Biscay into the Atlantic Ocean. T18 returned to Germany in mid-1943 and became a training ship again for the Torpedo School and U-boat Flotillas. The boat returned to active duty in mid-1944 and assigned to the Baltic where she was sunk by Soviet aircraft in September.

The Type 37 torpedo boat was a class of nine torpedo boats built for Nazi Germany's Kriegsmarine during World War II. Completed in 1941–1942, one boat helped to escort a commerce raider passing through the English Channel into the Atlantic Ocean in late 1941, but their first major action was in early 1942 when they formed part of the escort for a pair of battleships and a heavy cruiser through the Channel back to Germany in the Channel Dash. Two pairs of boats were sent to France at different times in mid-1942 and were part of the escort during an unsuccessful attempt to pass a different commerce raider back through the Channel in October. One boat was assigned to the Torpedo School as a training ship in mid-1942 and the others followed in the next year.