Q-112 Abra was a motor torpedo boat of the United States Army during World War II as part of the Offshore Patrol based at Manila.

On 9 February 1939, the Off Shore Patrol (OSP) was formed with its headquarters located at Muelle Del Codo, in the Port of Manila and was headed by U.S.

[7] After the Attack on Pearl Harbor, the squadron added two additional boats, converted launches that served as patrol boats, the Q-114 Danday (ex-Carmen, named after the wife of Jurado) and the Q-115 Baler (former tender of the presidential yacht BRP Banahaw (ex-Casiana, ex-Cassandra).

[8][9] The squadron patrolled the waters of the bay and protected the eastern shore of the Bataan Peninsula from Japanese infiltration.

[4] After Manila was declared an open city on 26 December 1941, the squadron operated out of Sisiman Cove [1], to the immediate east of Cavite and north of Corregidor where the American PT boats were also based.

[4] The squadron along with its American counterparts, were service by the submarine tender, Canopus which was moored at Cavite Naval Base.