Japanese escort ship Tsushima

Tsushima (対馬) was one of fourteen Etorofu-class escort ships built for the Imperial Japanese Navy during World War II.

Background and description
The Etorofu class was an improved version of the preceding Shimushu-class escort ship with a greater emphasis on anti-submarine warfare. The ships measured 77.72 m overall, with a beam of 9.1 m and a draft of 3.05 m. They displaced 870 LT at standard load and 1020 LT at deep load. The ships had two diesel engines, each driving one propeller shaft, which were rated at a total of 4200 bhp for a speed of 19.7 kn. The ships had a range of 8000 nmi at a speed of 16 kn.

The main armament of the Etorofu class consisted of three Type 3 120 mm guns in single mounts, one superfiring pair aft and one mount forward of the superstructure. They were built with four Type 96 25 mm anti-aircraft guns in two twin-gun mounts, but the total was increased to 15 guns by August 1943. 36 depth charges were stowed aboard initially, but this later increased by August 1943 to 60 depth charges with a Type 97 81 mm trench mortar and six depth charge throwers. They received Type 22 and Type 13 radars and Type 93 sonar in 1943–44.

Construction and career
Tsushima was launched by Tsurumi on 20 March 1943 and completed on 15 August. She served on repatriation duties until 1947 when she was turned over to the Republic of China Navy on 31 July and renamed Lin An.