Mischief Reef
Former US Navy landing ships-tank that served during World War II, and transferred to numerous countries including the Philippines. The Philippine Navy received its first ships of the class on 30 December 1946, and has received almost 30 units between 1946 and 1976. Some of those that were received came through South Vietnam as several ships were absorbed by the Philippine Navy upon their escape at the end of the Vietnam War. One of the ships, BRP "Sierra Madre" is technically retired from service, but was deliberately grounded at Ayungin Shoal and is treated as an active ship despite being modified as a semi-permanent structure and outpost to a few Philippine Marines stationed in the contested territory. Some of the ships were also used as helicopter platforms, stationing utility helicopters from the Philippine Air Force in several occasions, including during tensions with China in the Mischief Reef in 1995.