 Only the Soviet Union actually made use of its vessel and it was eventually used as a test ship before being scuttled during the 1950s.The 1930 London Naval Treaty had a clause that ships below standard displacement did not count against the national tonnage limits, so the "Kriegsmarine" attempted to design a high-speed, ocean-going torpedo boat with a maximum displacement of 600 long tons.This proved to be impossible as the over-ambitious high-speed requirement demanded use of the same troublesome high-pressure boilers that were being installed in the Type 1934 destroyers.