The KM-5 was a German high-speed, low-profile coastal minelayer (Küsten Minenleger). Designed for covert minelaying off the coast of England, these boats were built in Germany, the Netherlands, and Denmark. From 1943 to 1944, twenty of these boats were converted into torpedo boats (Kleine Schnellboote), and their designation was changed from KM to KS. Two light 450 mm torpedo tubes were installed in the stern instead of mine rails. KM-5 was laid down at the Rolandwerft shipyard in Bremen-Hemelingen in 1942 and entered service on August 8 of that year. It was first based on Lake Ladoga and then on Lake Peipsi from May 17, 1944. On July 2, 1944, the KM-5 burned down due to a short circuit in the electrical wiring. The crew sank it near Kastre. The KM-5 was raised on July 3, 1944, and its hull was captured by the USSR in May 1945.

The KM-5 was introduced in Update 2.19 "Drone Age". In battle, it is a fairly average, entry-level torpedo boat. It does not significantly outperform the larger, heavier S-38 Schnellboot in terms of speed, and it is lighter armed and carries less powerful torpedoes. However, it is much more compact, making it more difficult for the enemy to detect and hit.