The fourth ship to be so named by the Navy, Beaufort (PCS-1387) was laid down on 22 May 1943, at Whitestone, New York; launched on 10 October 1944, as simply PCS-1387; sponsored by Miss Barbara C. Dietz; and commissioned at the New York Navy Yard on 27 November 1944.

On the latter day, PCS-1387 began duty with the Fleet Sonar School, Key West, Florida, as a training platform for new sonarmen.

The 1950s, however, brought an increase in the extent of her zone of operations for, after that time, she ranged the Atlantic Ocean coast as far north as Narragansett Bay and south into the Caribbean.

On 15 July 1967, her name was struck from the Navy List, and she was turned over to the Naval Weapons Laboratory, Dahlgren, Virginia, for use as a target.

Apparently, she was not totally destroyed because she was sold in July 1972 to Mr. David Hahn of British Honduras.