The third USS Wanderer (SP-132), was an armed yacht that served in the United States Navy from 1917 to 1919. Wanderer was built in 1897 as the "gentleman's private steam yacht" Kethailes at Leith, Scotland, by Ramage & Ferguson for William Johnston, a wealthy shipowner. Kethailes was sold to Mr. H. A. C. Taylor of New York City in 1903 and renamed Wanderer. The U.S. Navy acquired Wanderer from Taylor on 10 June 1917 for service in World War I. Designated SP-132, she was commissioned as USS Wanderer New York on 14 July 1917. On 28 July 1917, Wanderer departed New York for a brief shakedown before she joined the rest of her division at St. John's, Newfoundland, where she arrived on 9 August 1917. Wanderer and six other yachts cleared St. John's on 12 August 1917 bound for Ponta Delgada in the Azores, where they made a four-day stop between 19 August 1917 and 24 August 1917. Late in the evening of 29 August 1917, the yachts anchored off the breakwater at their destination, Brest, France. The following morning, she and her division mates entered the port itself and tied up to mooring buoys. Wanderer was assigned to antisubmarine patrol and coastal convoy escort duties along the north Bay of Biscay coast. Her duty there was enlivened by the weather, which was known for its severity. Wanderer—designed as a pleasure craft, not as sturdy as a warship —- had less to fear from German submarines than from naval mines, weather, and the rocky, foggy shore. She operated initially on the Brest-to-Quiberon Bay leg of the coastal convoy route. To add to the danger, the Americans initially adopted the French-British system of running their coastal and channel convoys at night. The darkness, however, did not hide Wanderers convoy on the night of 28–29 November 1917, when a submarine successfully sank one of the ships in the convoy and made good her escape. The darkness that was supposed to conceal the convoy actually covered the U-boat's retirement and foiled attempts to hunt the submerged enemy. Nevertheless, the French and British insisted on night rather than daylight convoys. It was not until the evening of 7 January 1918, when another Wanderer-escorted convoy lost four ships to a U-boat, that the French and British acquiesced to American demands for daylight convoys supported by patrolling aircraft. The theory behind sending convoys through dangerous waters