Canadaigua, an auxiliary schooner, was designed by William H. Hand, Jr., and built at East Boothbay, Maine.

The Coast Guard acquired her later in 1942, designated her CG-81006, and used her on offshore patrol duty in the 3rd Naval District from 2 November 1942 to 30 October 1945.

She was transferred by the Coast Guard on 30 October 1945, was placed in service the next day, and assigned to the Underwater Sound Laboratory at New London, Connecticut.

She foundered there on 22 November 1945 due to hull damage inflicted alongside her pier during a nor'easter gale and was considered a total loss.

This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.