USNS Shearwater (T-AG-177)

USNS Shearwater (T-AG-177) was a Shearwater-class miscellaneous auxiliary built during the final months of World War II for the US Army as FS-411 (Design 381 coastal freighter). FS-411 was Coast Guard manned operating in the Central and Western Pacific, including Hawaii, Saipan, TInian, Guam, during the closing days of the war.

She was placed into service by the U.S. Navy from 1964 to 1969 as USNS Shearwater (T-AG-177). After this service, she was transferred back to the U.S. Army.

Operational history as T-AG-177
Shearwater began her naval service as a survey support ship with the Military Sea Transportation Service in May 1964. Operated by a Civil Service crew, she operated in the Atlantic Ocean until mid-February 1969, when she was transferred back to the U.S. Army.