Maryann, sometimes seen as Maryanne or Mary Anne, was a yacht requisitioned and converted by the United States Navy during the defense of the Philippines in World War II and destroyed 5 May 1942 at Corregidor to prevent capture. The yacht was "in service" and not commissioned.
Maryann was in service from 8 December 1941 until she was scuttled at Corregidor on 5 May 1942 to prevent her capture by the Japanese. She was, apparently, never formally commissioned as a United States Ship (U.S.S.) nor given an official designation but is shown in U.S. Navy and Coast Guard Vessels, Sunk or Damaged Beyond Repair during World War II, 7 December 1941-1 October 1945 under "Converted Patrol Vessels" along with Fisheries II and another converted yacht, Perry without the U.S.S. designation nor a hull number.
On 13 December 1941 Maryann was assigned to the Base Section of the Inshore Patrol of the United States Asiatic Fleet. Maryann was first commanded by Ensign Fred Rising Newell, Jr., USNR.
From January 4 to April 29, 1942 she was commanded by Lieutenant Fred Luman Raymond. Raymond, along with Lieutenant (junior grade) Fred Rising Newell, Jr., would receive the Navy Cross for heroism during the defense of the Philippines. Lieutenant Raymond was taken prisoner by the Japanese and died on December 15, 1944.
After destruction of facilities at Cavite Navy Yard on 10 December 1941 Maryann moved with Motor Torpedo Boat Squadron Three to Sisiman Bay on the Bataan Peninsula where the commandeered tug Trabajador served as tender to the squadron. Despite the need to patrol in pairs in the event one PT needed assistance from another the critical shortage of spares and fuel often prevented such paring so that one of the small converted patrol yachts, Maryann, Perry, or Fisheries II was used to accompany the PT. On the night of 1 February the converted yacht was in company with PT-32 which was damaged "with her hull held together by a jury rig of wires and braces" and capable of only 22 knots (25 mph; 41 km/h) on a patrol off Bataan during which the PT made an attack on a large ship thought to be a cruiser. On 10 March the last PT boats departed south with General MacArthur with increased Japanese naval activity in the vicinity of the entrances to Manila Bay.