Gregorio del Pilar-class frigate

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PF-15 and SARV-002 CARAT 2013.jpg
Class overview
Name: Gregorio del Pilar class Frigate
Builders: Avondale Shipyards, USA
Operators:  Philippine Navy
In service: 2011 to present
Active: 2
General characteristics y
Class & type: Gregorio del Pilar class
Type: Frigate
Displacement: 3,250 tons
Length: 378 ft (115 m)
Beam: 43 ft (13 m)
Draft: 8.75 ft (2.67 m)
Speed: 29 knots (54 km/h)
Range: 14,000 nautical miles (25,900 km)
Endurance: 45 Days
Boats & landing
craft carried:
2 × RHIB
Complement: 80
Sensors and
processing systems:
  • Kelvin Hughes MantaDigital 25KW X-band magnetron navigational radar
  • Kelvin Hughes MantaDigital 200KW SharpEye S-band solid state navigation/surface search radar
  • Furuno FAR-28X7 series navigation radars
  • Sperry Mk. 92 Mod. 1 Fire Control System[1]
Electronic warfare
& decoys:
2 × Mk.36 Super Rapid Blooming Offboard Countermeasures (SRBOC) Chaff and Decoy Launching System[2]
Aircraft carried: 1 × AgustaWestland AW109 Power naval helicopter[6]
Aviation facilities: retractable hangar and flight deck

The Gregorio del Pilar class is a ship class of two frigates currently in service of the Philippine Navy, and are currently the foremost surface combatant of the fleet. These ships were formerly used by the US Coast Guard as Hamilton class high endurance cutters. A third Hamilton class cutter, USCGC Boutwell (WHEC-719), will be donated in early 2016 by the United States.


The ship was designed with a high level of habitability and provides fairly comfortable accommodations, including air conditioning.[7]


The Gregorio del Pilar class are the first Philippine military vessels to employ the now common shipboard application of aircraft gas turbine jet engines with the use of controllable pitch propellers. The class are equipped with two 18,000 horsepower (13,000 kW) Pratt & Whitney[8] gas turbines and can propel the ship at speeds up to 28 knots (52 km/h). The class also has two 3,500 horsepower (2,600 kW) Fairbanks-Morse[8] diesel engines, capable of driving the ship economically at 17 knots (31 km/h) for up to 14,400 nautical miles (26,700 km) without refueling.[8] A retractable/rotatable bow propulsion unit provides manoeuvrability in tight situations.


Prior to turn-over to the Philippine Navy, the Hamilton-class cutters were armed with a Mk.75 Oto Melara 76 mm Compact main gun, two Mk.38 M242 Bushmaster 25 mm chain gun at midships, and a Phalanx CIWS system aft.[8] The CIWS and chain guns were removed by the United States Coast Guard prior to turn-over, with the Mk.75 gun remaining.

The Philippine Navy installed a Mk. 38 Mod. 1 25mm chain gun and two Mk. 16 20mm Oerlikon autocannons to the PF-15, and six 50-caliber machine guns on both the PF-15 and PF-16.[4][9][10]

The Philippines ordered two new Mk. 38 Mod. 2 25mm chain guns, and are expected to be installed to the ships of the class.[11] On Feb. 17, 2014, it was reported that the Mk. 38 Mod. 2 25mm guns are already in the Philippines, waiting for the U.S. Coast Guard armament team who will install the weapons.[12] As of January 25, 2015, 2 Mk. 38 Mod. 2 25mm guns are already installed on PF-16.[5]

Flight Support

The Gregorio del Pilar class has a flight deck and hangar capable of handling helicopters. A BO-105 light surveillance helicopter was initially assigned to BRP Gregorio del Pilar, and was replaced by the newer AgustaWestland AW109 Power helicopter.[13] The helicopters first made their shipboard deployment on May 21, 2014.

Future Upgrades

It was also reported that the Philippine Navy is planning further upgrades for its Gregorio del Pilar-class Frigates. The upgrades will feature upgrades for navigation, propulsion, communication, surveillance, and weapons systems.[14]

Ships in Class

Bow number Ship name Launched Commissioned Service Status
PF-15 BRP Gregorio del Pilar 18 December 1965 14 December 2011 Offshore Combat Force Active
PF-16 BRP Ramon Alcaraz 1 October 1966 22 November 2013 Offshore Combat Force Active
PF-17 TBD TBD TBD Offshore Combat Force TBD



  1. 1.0 1.1 Saunders, Stephen: Jane's Fighting Ships 107th Edition 2004-2005. Jane's Information Group Ltd, 2004.
  2. "Navy flagship sheds US identity; videoke onboard". 2011-09-03. Retrieved 2011-09-03.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  3. 3.0 3.1 "Navy ship to get new weapons systems". 2012-10-29. Retrieved 2014-06-16.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  4. 4.0 4.1 4.2 4.3 4.4 Saunders, Stephen (2013). IHS Jane's Fighting Ships 2013-2014. IHS. p. 614. ISBN 978 0 7106 3048 3.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  5. 5.0 5.1 "Finally, the Philippine Navy's BRP Ramon Alcaraz got its Mk.38 Mod.2 Guns". 2015-01-25. Retrieved 2015-01-26.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  6. PNA with Camille Diola (June 25, 2014). "New Navy attack helicopters to join first naval maneuvers". Retrieved June 25, 2014.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  7. "History of USCGC Hamilton (WHEC-715)". USCGC Hamilton (WHEC-715) official web site. United States Coast Guard. 2008-06-20. Retrieved 2008-08-08.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  8. 8.0 8.1 8.2 8.3 "WHEC 378' Hamilton class". 2005-04-27. Retrieved 2008-08-08.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  9. Re: Retitled: BRP Gregorio del Pilar (PF-15) - ex USCGC Hamilton (WHEC-715)
  11. "No. 721-12 Contracts". U.S. Department of Defense Office of the Assistant Secretary of Defense (Public Affairs). Retrieved 2012-09-09.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  12. "BRP Ramon Alcaraz fitted with 'Bushmaster' auto cannons soon". PTV News. 2014-02-17. Retrieved 2014-02-22.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  13. Alexis Romero (December 19, 2013). "AFP commissions 3 brand-new naval choppers". Retrieved June 17, 2014.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  14. Grevatt, Jon (2013-12-16). "Philippines plans further upgrades to ex-US Coast Guard cutters". IHS Jane's 360. Retrieved 2013-12-18.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>