"Corsair II" had been chartered by the US Navy in 1917 and, as the USS "Corsair" (SP-159), took part in patrols against enemy submarines off the west coast of France, being returned to Morgan in 1919 with an outstanding rescue record.She was acquired by the US Navy in 1942 and renamed the USS "Oceanographer" (AGS-3), serving with the Coast and Geodetic Survey.