Rio de Janeiro Maru Class Auxiliary Submarine Depot Ship

(Rio de Janeiro Maru as a pre-war O.S.K. liner)

RIO DE JANEIRO MARU was converted to a submarine depot ship in 1942. She was rerated as a transport in 1943 and sunk by carrier aircraft at Truk in February 1944.

Builder and Year Completed: Mitsubishi, Nagasaki, 1930
Displacement: 9,627-tons.
Dimensions: 461.3' x 62’ x 26’
Propulsion: 2 Mitsubishi-Sulzer diesels, 2 shafts, 6, 500 shp.
Armament: Four 5.9-inch (150-mm), two 25-mm Type 96 dual AA guns.