BRP Gregorio Del Pilar (PF-8)
The BRP Gregorio del Pilar (PF-8) was an Andres Bonifacio class frigate of the Philippine Navy in commission from 1977 to 1990. She was one of six ex-United States Navy Barnegat-class seaplane tenders/ex-United States Coast Guard Casco-class high endurance cutters received from the United States after the Vietnam War, two of which were acquired to supply spare parts for the other four. She and her three commissioned sister ships were the largest Philippine Navy combat ships of their time.
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... The single Mk. 12 5-inch/38-caliber (127 mm) gun was Andres Bonifacio's primary weapon ...