The Prab 741 (เรือหลวงปราบ 741) is a decommissioned Thai navy vessel sunk to create an artificial reef in May 2011.

It was previously known as the USS LCI (M) – 670 and was laid down at George Lawley & Sons (Neponset, Massachusetts, U.S.A.) on 21 March 1944, launched on 28 March 1944, and commissioned on 4 April 1944.
She now lies upright in 22 meters of water, just south of Koh Ngam Noi. Penetration of the wheelhouse is possible and the forward and rear guns are still intact and in good condition.