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PC-461-class submarine chaser
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The PC-461-class submarine chasers were a class of 341 submarine chasers constructed between 1941 and 1944 for the United States Navy (USN). The PC-461s were based primarily on two experimental submarine chasers, PC-451 and PC-452. While PC-461 began the series, the first of the class to enter service was PC-471. Fifty-nine PC-461s were converted to other types of patrol vessels.