BRP Diego Silang (PF-9)[2] was an Andrés Bonifacio-class frigate of the Philippine Navy in commission from 1976 to 1990.

Diego Silang was built in the United States by Lake Washington Shipyard at Houghton, Washington, as the United States Navy Barnegat-class seaplane tender USS Bering Strait (AVP-34).

Commissioned in July 1944, Bering Strait served in the Central Pacific during World War II and on occupation duty in Japan postwar.

The ships were passed to the Philippine Navy with fewer weapons on-board and old surface search radars, and these were addressed later on by the Philippine Navy through modernization programs, including the addition of a helicopter landing pad in 1979.

The main engines could propel the 1,766-ton-displacement (standard load) ship at a maximum speed of around 18 knots (33 km/h).

[7] The Philippine Navy made plans to equip Diego Silang and her sister ships with new radar systems and long-range BGM-84 Harpoon anti-ship cruise missiles, but this upgrade did not materialize due to the worsening political and economic crisis in the Philippines in the mid-1980s.