It was initially designated as Fast Patrol Craft, and was numbered "DF-390", but later on was re-designated as a Patrol Gunboat, and was finally re-numbered as "PG-390".[2] Another round of reclassification was made in April 2016, which re-designated the patrol gunboat as the coastal patrol craft "PC-390".
The ship was built to U.S. Coast Guard standards with aluminum hull and superstructure. She is powered by two Detroit Diesel 16V-92TA Diesel Engines with a combined power of around 2,800 hp driving two propellers for a maximum speed of 28kn. Maximum range is 1200nmi at 12kn, or alternatively 600nmi at 24kn.
The ship originally designed to carry one bow Mk.3 40 mm gun, one 81 mm mortar aft, and four 12.7 mm/50 caliber machine guns. Instead, she is armed with only four M2HB Browning 12.7 mm/50 caliber machine guns on Mk.26 mounts, with two positioned forward and two aft; and two M60 7.62 mm/30 caliber machine guns, both mounted amidships. The ship can carry 4,000 rounds of 12.7 mm and 2,000 rounds of 7.62 mm. A large "Big Eyes" binocular is also carried on tripod mounts, one on the forecastle and one just above the mast.
As part of the first batch (PG-370 to PG-378), it is not equipped with Mk.38 Mod.0 M242 Bushmaster 25mm chain gun that her other sister ships carry.[3] It was planned to install either a stabilized or unstabilized M242 25 mm Bushmaster chain gun on her bow after some minor modifications, but as of to date has not materialized.
She is equipped with a Raytheon AN/SPS-64(V)11 surface search and navigation radar but with a smaller antenna as those used in bigger Philippine Navy ships.[1]
A 4-meter rigid inflatable boat powered by a 40-hp outboard motor is stowed amidships.[4]