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Type D escort ship
The were a class of ships in the service of the Imperial Japanese Navy during World War II. The Japanese called them "Type D" coast defence ships, and they were the sixth class of ''Kaibōkan'' (''Kai'' = sea, ocean, ''Bo'' = defence, ''Kan'' = ship), a name used to denote a multi-purpose vessel.〔""coast defense ships." The Japanese used this curious rating to denote a multi-purpose vessel." Worth P. 208〕
==Background==
The ''Type D'', like the and , were dedicated to the anti-aircraft and anti-submarine role.
In 22 April 1943, the Navy General Staff decided a mass production of escort ships, because of the urgent need to protect the convoys which were under constant attack. The plan was to build a basic escort ship of around 800 tons, with a simple design for easy construction.
The first designs, for "Type A" ''Etorofu'' class and "Type B" ''Mikura'' class, still needed too many man-hours for building, so in June 1943, the Navy General Staff planned for a simplified design. The result was the ''Ukuru'' class, and a scaled down model of the ''Mikura'' class, which became the ''"Type C"'' and "Type D" escort classes.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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