USS Halcyon (SP-518)

USS Halcyon (SP-518) was a motor launch borrowed by the U.S. Navy from the U.S. Bureau of Fisheries during World War I. She was outfitted as a patrol craft and assigned to the 1st Naval District, headquartered at Portsmouth Navy Yard in Kittery, Maine. Post-war she was returned to the Bureau of Fisheries.

USS Halcyon (SP-518)

USS Halcyon (SP-518) was a motor launch borrowed by the U.S. Navy from the U.S. Bureau of Fisheries during World War I. She was outfitted as a patrol craft and assigned to the 1st Naval District, headquartered at Portsmouth Navy Yard in Kittery, Maine. Post-war she was returned to the Bureau of Fisheries.