Launched at Maizuru in October 1915, completed on 4 April 1916, captured in August 1945, served in the Repatriation Service until 1947, handed over to the USA but given back in 1948, added to the Japanese Self Defence Force in 1948 and as patrol boat PS 29 stricken from the effective list between 1953-1954. Between 1948-1954 also used as buoy tender at Hiroshima. The appareance of the several units differs expecially dealing with the position of the main mast, which by some ships even was fitted at one side at the stern. Some sources referred to as mining vessels. General characteristics a displacement of 405 (standard)-420 (normal) tons (metric tons 412 respectively 427) and as dimensions 150 (between perpendicular) x 25 x 7.5 feet. Range 430 nautical miles/12 knots speed. Reciprocating propulsion with one boiler and vertical triple expansion engine delivering 600 ihp allowing a speed of 12.8 knots. Armament consisted of 2x1-7.72cm/3” 40 cal anti aircraft guns and 120 mines type No. 4 of which 60 were stowed on rails on the upper deck and the other 60 in 3 holds and probably 2-4 machine guns. The aft gun was replaced between 1941-1942 by depth charge equipment. Served as minelayers, escort and harbour defence duties.

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