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BRP Gregorio del Pilar (PS-15)
FF-15 with AW-109.jpg
BRP Gregorio del Pilar (PS-15)
Career  United States
Name: USCGC Hamilton
Builder: Avondale Shipyards
Launched: December 18, 1965
Commissioned: March 18, 1967
Decommissioned: March 28, 2011
Identification: WHEC-715
Fate: Transferred to Philippine Navy
Badge: USCGC Hamilton (WHEC-715) (crest).gif
Career  Philippines
Name: BRP Gregorio del Pilar
Namesake: Gregorio Hilario del Pilar y Sempio
Acquired: May 13, 2011
Commissioned: December 14, 2011
Maiden voyage: July 18, 2011
Homeport: Subic Bay Freeport Zone
Nickname: BRP Goyo
Status: Inactive (under repair)
Notes: Current Flagship of the Philippine Navy
Badge: GDP Ship Badge.jpg
General characteristics
Class & type: Gregorio del Pilar-class offshore patrol vessel
Displacement: 3,250 tons
Length: 378 ft (115.2 m)
Beam: 43 ft (13.1 m)
Draft: 8.75 ft (2.7 m)
Speed: 29 kn (53.7 km/h; 33.4 mph)
Range: 14000 nmi (25928 km)
Endurance: 45 days
Boats & landing
craft carried:
2 × RHIB
Complement: 85
Sensors and
processing systems:
  • Combat System:
    Hanwha Group Hanwha Systems Naval Shield Baseline 2 ICMS (Notice of Award)
  • Search radar:
    Saab AB AN/SPS-77 Sea Giraffe AMB 3D air/surface search radar (Awaiting Installation)
  • Navigation radar:
    Kelvin Hughes MK2 25KW X-band navigational radar

    Kelvin Hughes Sharpeye 200W S-band solid state navigation/surface search radar
  • Fire control radar:
    Sperry Mk 92 Mod 1 Fire Control System[1]
  • Electro-Optical Tracking System:
    FLIR Systems SEAFLIR 230 electro-optical/infra-red (EO/IR) system (Awaiting Installation)
  • Sonar:
    Wartsila ELAC Hunter hull mounted sonar (Notice of Award)
Electronic warfare
& decoys:
2 × Mk 36 SRBOC Chaff and Decoy Launching System[2]
Aircraft carried: 1 × AW109E Power naval helicopter[4]
Aviation facilities: retractable hangar and flight deck

BRP Gregorio del Pilar (PF-15), arrives at Joint Base Pearl Harbor-Hickam during a scheduled port visit. (July 2011)

USCGC Hamilton (WHEC-715)

BRP Gregorio del Pilar (PS-15) is the lead ship of her class of offshore patrol vessels of the Philippine Navy. She is the second ship to be named after Gregorio del Pilar, a Filipino revolutionary general known for his role at the Battle of Tirad Pass. She was originally designated as "PF-15" from 2012 to mid-2016. Then the Navy adopted a new code designation system and she was redesignated as "FF-15". In February 2019, the Navy downgraded the status of the entire class from frigate to patrol ship and redesignated her to "PS-15".[5]

From 1967–2011, the ship was a Hamilton-class high endurance cutter of the United States Coast Guard, known as USCGC Hamilton. The U.S. decommissioned the cutter on 28 March 2011, and the Philippines acquired it under the Excess Defense Articles and the Foreign Assistance Act.[6] It is one of three ex-US Coast Guard Hamilton-class cutters to serve the Philippine Navy.[7]

Construction and design[edit | edit source]

The ship now known as BRP Gregorio del Pilar (PS-15) was launched on December 18, 1965, at Avondale Shipyards near New Orleans, Louisiana, as USCGC Hamilton (WHEC-715) and was named for Alexander Hamilton the first United States Secretary of the Treasury and founder of the United States Revenue Cutter Service. Hamilton was commissioned March 18, 1967.

The ship is designed with a high level of habitability and provides fairly comfortable accommodations, including air conditioning.[8] Gregorio del Pilar is the first Philippine military vessel to employ the now common shipboard application of aircraft gas turbine jet engines with the use of controllable pitch propellers and is equipped with two 18,000 horsepower (13,000 kW) Pratt & Whitney[9][9] gas turbines that can propel the ship at speeds up to 28 knots (52 km/h). Gregorio del Pilar also has two 3,500 horsepower (2,600 kW) Fairbanks-Morse[9] 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 refuelling.[9] A retractable/rotatable bow propulsion unit provides manoeuvrability in tight situations.

Armament[edit | edit source]

The ship was 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.[10] The CIWS and chain guns were removed by the US Coast Guard prior to its turn-over to the Philippine Navy. Only the Mk.75 gun remains.

Plans to install additional weapons were made, which includes one Mk. 38 Mod 1 25 mm chain gun aft, two Mk.16 20 mm autocannons midships, and six 12.7 mm machine guns.[2] These were installed during its scheduled dock works before the commissioning ceremonies.[3] Photos during the commissioning ceremonies confirmed the presence of such weapons.[11]

The Philippines reportedly ordered at least four new Mk.38 Mod 3 25mm naval guns, and are expected to be installed on all Gregorio del Pilar class ships.[12][13][14]

It was also reported that the Philippine Navy will be getting sophisticated radar system capable of detecting and tracking surface threats, a Harpoon anti-ship missile system, and torpedo decoy systems. This would be purchased from the United States possibly under a government-to-government deal.[15]

Flight support[edit | edit source]

The ship has a flight deck and hangar capable of handling helicopters.

A BO-105 light surveillance helicopter was initially assigned to the ship, and was replaced by the AgustaWestland AW109 Power, which made its first official shipboard deployment on May 21, 2014.[4]

Modernization[edit | edit source]

The Philippine Navy plans to modernize the entire ship of the class, with an initial program to upgrade the ship's sensors, and another program to improve its weapon systems.

Several systems were acquired through US Foreign Military Sales (FMS) and Foreign Military Financing (FMF), which includes the BAE Systems Mk. 38 Mod. 2 machine gun system, the SAAB AN/SPS-77 Sea Giraffe AMB 3D air/surface search radar,[16] and the FLIR Systems SeaFLIR 230 Electro-Optical/Infra-Red Camera.[17]

Meanwhile, the Philippine Navy will launch a program to acquire, install and integrate several other sensors into the ship, as part of the Horizon 2 phase of the Revised AFP Modernization Program. Among those to be acquired are new Combat Management System (CMS), Hull Mounted Sonar (HMS), and a Radar Electronic Support Measures (R-ESM).[17]

Future upgrades are planned to install defensive and offensive missile systems and torpedo launchers, although funding is still being secured and might only be included in the next phase of the Navy's modernization program.

Service history[edit | edit source]

United States Coast Guard (1967–2011)[edit | edit source]

In 1988, Hamilton completed a three-year fleet renovation and modernization that provided the ship with modern weapons and electronics systems. All spaces and machinery were also completely overhauled and refurbished. The new technology enables Hamilton to operate seamlessly with the United States Navy.[8]

Hamilton has served a variety of missions with distinction. During a 1969–70 deployment to Vietnam, Hamilton interdicted weapons smugglers and fired more than 4,600 rounds of gunfire in support of U.S. and Vietnamese troops ashore. From 1965–1975, Hamilton served on Atlantic Ocean Stations, collecting valuable oceanographic data and conducting frequent search and rescue missions. Hamilton also directed the interdictions of over 21,000 Haitian migrants throughout the Caribbean during Operation Able Manner. In 1994, Hamilton received the Coast Guard Meritorious Unit Commendation for rescuing 135 Haitians from the sea after their sailboat capsized and sank. In 1996, Hamilton transited the Panama Canal and served as the command and control platform for Operation Frontier Shield, a multi-agency effort to curtail the influx of narcotics into the United States. Hamilton intercepted 14 drug-laden vessels carrying more than 115 tons of contraband worth 200 million dollars. In 1999, Hamilton seized over 2,700 kilograms (6,000 lb) of cocaine bound for the U.S. in the Eastern Pacific Ocean. Hamilton frequently patrolled the Bering Sea off the Alaskan coast at the Maritime Boundary Line (MBL) which separates the Russian and the United States' Exclusive Economic Zones (EEZ). Hamilton's presence on the MBL deters foreign fishing vessels from fishing in the U.S. EEZ.[8]

In March 2007, Hamilton assisted Sherman in the largest recorded maritime drug bust in history. The two vessels intercepted the Panamanian-flagged fishing vessel Gatun in international waters and were able to recover 20 metric tons of cocaine, with an estimated street value of $600 million retail. The seizure was the largest drug bust in US history and the largest interdiction at sea.[18]

Philippine Navy (2011–present)[edit | edit source]

Proposal to decommission USCGC Hamilton from the US Coast Guard was made for fiscal year 2011 budget, and the Philippines sent a formal letter of interest for its purchase. USCGC Hamilton was decommissioned on March 28, 2011, and transferred to the Philippine Navy as an excess defense article under the Foreign Assistance Act. The Philippines sent a team to conduct a thorough inspection of the ship in November 2010.[19]

The US Coast Guard removed some of the ship's equipment before its transfer to the Philippine Navy and plans to use those equipment as spare parts for the other US Coast Guard ships. Among those that were removed are the AN/SPS-40 air surface search radar, Phalanx CIWS, and two Mk.38 M242 Bushmaster 25 mm chain guns. In return, the US Coast Guard began procuring and installing the safe-to-sail navigation equipment, radar systems and additional electronics that the Philippines requested as part of its transfer support case.[19] The Philippine Navy installed a 25 mm chain gun, two 20 mm guns, and six mounted 50-caliber guns[2] as replacement for the equipment removed.

The ship's transfer cost was pegged at Php450 million, while operation costs for two years was estimated at Php120 million. Funding came from Philippines' Department of Energy, considering that the vessel is projected to be deployed to secure oil platform and exploration activities in the Western and Southern Philippines.[20]

Training for the crew started in January 2011, when the US Coast Guard provided 10 weeks of combined dockside and underway training on USCGC Boutwell for the ship's prospective commanding officer, executive officer and crew.[19]

Gregorio del Pilar (PF-15) was formally transferred to the Philippines on May 13, 2011, at the transfer ceremony on Coast Guard Island. Captain Alberto A. Cruz became its first commanding officer.[19]

Its maiden voyage included a port visit to Hawaii and docking at Alameda, California to finish the remaining work, with around 13 separate contracting actions. Gregorio del Pilar conducted a test at the coast of California to measure the crew's capabilities and the ship's seaworthiness. Gregorio del Pilar made a port visit at Joint Base Pearl Harbor-Hickam which was the first time that a Philippine vessel docked at Pearl Harbor.[21][22] She arrived on the Philippines on August 17, 2011[23] after port visit in Guam.[24][25] Gregorio del Pilar arrived in Manila on August 21, 2011.[21] The arrival ceremony was held on August 23, 2011, and minor improvements were done the following days.[26][27]

BRP Gregorio del Pilar (PF-15) was formally commissioned by the Philippine Navy on December 14, 2011, at Pier 13, Manila South Harbor. President Benigno Aquino III's elder sister, Ballsy Cruz, was the principal sponsor of the ship.[28]

President Aquino hoped that this, his first major military acquisition, would be a symbol of his administration's intention to strengthen and modernize the Philippine Navy and the Armed Forces, and to defend its territory and Exclusive Economic Zone (EEZ) in the South China Sea.[27][29]

BRP Gregorio del Pilar was involved in a standoff in 2012 at the Scarborough Shoal when it tried to apprehend eight Chinese fishing vessels in the island.[30][31][32][33]

BRP Gregorio del Pilar was also one of the naval vessels that the AFP Western Command sent to help in the searching efforts for Malaysia Airlines Flight 370.[34]

U.S. President Barack Obama aboard the BRP Gregorio del Pilar, November 17, 2015

On November 17, 2015, United States President Barack Obama visited and toured the ship on the sidelines of the APEC Summit to highlight the United States' commitment to assist East Asian countries in maritime security, amidst the territorial disputes in the South China Sea.[35] After touring the ship, he announced that a third Hamilton-class cutter similar to Gregorio del Pilar (USCGC Boutwell (WHEC-719)) and the research vessel Template:RV will be turned over to the Philippine Navy.[36]

Around mid-2016, the Philippine Navy started calling the ship in its new code designation FF-15, together with its sister ship BRP Ramon Alcaraz which was re-designated as FF-16, and the new BRP Andres Bonifacio designated as FF-17.[37]

On August 29, 2018, she ran aground at Hasa Hasa Shoal in the West Philippine Sea off Palawan.[38] She was eventually removed from the shoal on September 3, 2018, and towed to Subic Bay for repairs.[39][40]

Notable operational deployments[edit | edit source]

Port calls[edit | edit source]

On July 27, 2011, Gregorio del Pilar arrived at Joint Base Pearl Harbor-Hickam for a scheduled port visit. She took on supplies and fuel, and held a reception hosted by the Philippine Consulate in Honolulu and the Philippine Celebrations Coordinating Committee of Hawaii. The crew also visited the USS Arizona Memorial. It also marks the first time a Philippine naval vessel pulled into Pearl Harbor.[21][22]

Search and rescue[edit | edit source]

BRP Gregorio del Pilar steams along USS George Washington during Operation Damayan after Typhoon Haiyan.

BRP Gregorio Del Pilar was assigned to Naval Forces Western to help in a joint multinational disaster relief and response operations dubbed Operation Damayan after the Visayan Islands were struck by Typhoon Haiyan in November 2013.

On 2014, the ship has been deployed in the search for the missing Malaysia Airlines Flight 370.[41]

Exercises[edit | edit source]

On July 30, 2011, Gregorio del Pilar and USS Reuben James conducted a Passing Exercise (PASSEX) off the coast of Hawaii.[21]

On August 22, 2011, the United States Embassy in Manila posted on their Facebook account photos indicating that BRP Gregorio del Pilar had an in-stride training with USS Fitzgerald on their transit to Guam, which may have started around August 4, 2011.[42]

On August 14–16, 2012, the Naval Forces Northern Luzon (NFNL) conducted a small-scale Naval Exercise code-named SAGEX 02–12 at the waters of South China Sea. BRP Gregorio del Pilar together with BRP Rajah Humabon and BRP Liberato Picar participated under Naval Task Force (NTF) 11. The exercise includes patrol, simulated tracking of targets and interdiction and capped by live firing exercises.[43]

Gregorio del Pilar, together with BRP Rajah Humabon participated in the sea phase exercises with the US Navy during the Balikatan 2013 from April 5 to 17, 2013.[44]

The ship conducted an offshore visit at Lingayen, Pangasinan during the city's "Pistay Dayat 2013" ("Feast of the Sea 2013"), with an open house tour and rescue exhibition exercises performed by the crew.[45]

From June 27 to July 2, 2013, Gregorio del Pilar participated in joint naval maneuvers during Cooperation Afloat Readiness and Training 2013 Philippines (CARAT 2013 Philippines) with other Philippine and United States naval and coast guard ships. The at-sea phase was conducted on June 27 off the waters midway from Zambales province and Panatag (Scarborough) Shoal.[46]

The U.S. Navy destroyer USS John S. McCain, and Philippine Navy frigates BRP Gregaorio del Pilar and BRP Ramon Alcaraz steam in formation during CARAT Philippines 2014.

The ship, together with its sister ship BRP Ramon Alcaraz participated in joint naval maneuvers as part of CARAT 2014 Philippines from June 26 to July 1, 2014. It was scheduled to conduct exercises on gunnery, combined air, surface, anti-submarine operations at sea.[47]

In May 2018, the BRP Gregorio del Pilar participated in the Third Multilateral Naval Exercise Komodo 2018 held from May 8 to 9, 2018 in Lombok, Indonesia.[48]

See also[edit | edit source]

References[edit | edit source]

  1. 1.0 1.1 Saunders, Stephen: Jane's Fighting Ships 107th Edition 2004–2005. Jane's Information Group Ltd, 2004.
  2. 2.0 2.1 2.2 "Navy flagship sheds US identity; videoke onboard". Inquirer.net. September 3, 2011. http://globalnation.inquirer.net/11559/navy-flagship-sheds-us-identity-videoke-onboard. Retrieved September 3, 2011. 
  3. 3.0 3.1 Saunders, Stephen (2013). IHS Jane's Fighting Ships 2013–2014. IHS. p. 614. ISBN 978 0 7106 3048 3. 
  4. 4.0 4.1 PNA with Camille Diola (June 25, 2014). "New Navy attack helicopters to join first naval maneuvers". http://www.philstar.com/headlines/2014/06/25/1338879/new-navy-attack-helicopters-join-first-naval-maneuvers. Retrieved June 25, 2014. 
  5. Share; Twitter. "Del Pilar-class frigates redesignated as patrol ships" (in en). https://www.pna.gov.ph/articles/1066243. 
  6. Dhick, Mowby (May 14, 2011). Hamilton/d,phildet/ "13/05/2011: Philippine Navy Acquires USCGC Hamilton". http://www.philippineembassy-usa.org/news/1682/300/Philippine-Navy-Acquires-USCGC-Hamilton/d,phildet/. Retrieved May 13, 2011. 
  7. "AFP eyeing 2 more second-hand US ships". ABS-CBN News. April 26, 2011. http://www.abs-cbnnews.com/nation/04/26/11/afp-eyeing-2-more-second-hand-us-ships. Retrieved May 15, 2011. 
  8. 8.0 8.1 8.2 Hamilton/history.asp "History of USCGC Hamilton (WHEC-715)". USCGC Hamilton (WHEC-715) official web site. United States Coast Guard. June 20, 2008. http://www.uscg.mil/pacarea/cgcHamilton/history.asp. Retrieved August 8, 2008. 
  9. 9.0 9.1 9.2 9.3 "WHEC 378' Hamilton class". GlobalSecurity.org. April 27, 2005. Archived from the original on August 13, 2008. https://web.archive.org/web/20080813153020/http://www.globalsecurity.org/military/systems/ship/whec-378.htm. Retrieved August 8, 2008. 
  10. "WHEC 378' Hamilton class". Globalsecurity.org. http://www.globalsecurity.org/military/systems/ship/whec-378.htm. Retrieved December 15, 2011. 
  11. "Re: Retitled: BRP Gregorio del Pilar (PF-15) – ex USCGC Hamilton (WHEC-715)". http://www.timawa.net/forum/index.php?topic=25937.msg294772. 
  12. "No. 721-12 Contracts". U.S. Department of Defense Office of the Assistant Secretary of Defense (Public Affairs). http://www.defense.gov/contracts/contract.aspx?contractid=4868. Retrieved September 9, 2012. 
  13. "Contracts for Sept. 29, 2016". U.S. Department of Defense. 2016-09-29. https://dod.defense.gov/News/Contracts/Contract-View/Article/959765/. Retrieved 2019-06-25. 
  14. "Philippine Navy Expecting 4 New Mk. 38 Mod. 3 Gun Systems from 2 Contracts". MaxDefense Philippines. 2017-03-12. http://maxdefense.blogspot.com/2017/03/philippine-navy-expecting-4-new-mk-38.html. Retrieved 2019-06-25. 
  15. "New Equipment For Navy Ships". Manila Bulletin. http://www.mb.com.ph/articles/372747/new-equipment-for-navy-ships. Retrieved September 9, 2012. 
  16. "U.S. Green Lights FMS of AN/SPS-77 Sea Giraffe Radar for Philippines Navy Hamilton-class Cutters". Navy Recognition. 2016-12-14. http://navyrecognition.com/index.php/news/defence-news/2016/december-2016-navy-naval-forces-defense-industry-technology-maritime-security-global-news/4678-u-s-green-lights-fms-of-an-sps-77-sea-giraffe-radar-for-philippines-navy-hamilton-class-cutters.html. Retrieved 2016-12-16. 
  17. 17.0 17.1 Montero, Max (2018-05-23). "MaxDefense Philippines 23 May 2018". MaxDefense Philippines. https://www.facebook.com/MaxDefense/photos/a.119059604931372/715827491921244/?type=3&theater. Retrieved 2018-10-12. 
  18. Carter, Cmdr. Jeff (March 21, 2007). "Coast Guard Makes Recort Maritime Cocaine Seizure". USCG Press Statement. United States Coast Guard. http://www.piersystem.com/go/doc/786/151219/. Retrieved August 8, 2008. 
  19. 19.0 19.1 19.2 19.3 "US Coast Guard Transfers High Endurance Cutters Hamilton and Chase to the Philippines and Nigeria". US Coast Guard. May 2011. http://www.uscg.mil/acquisition/newsroom/pdf/CG9newsletterMay11.pdf. Retrieved June 15, 2011. 
  20. "Introducing: PHL Navy's cutter BRP 'Gregorio del Pilar'". US News Las Vegas. May 16, 2011. http://www.usnewslasvegas.com/national/introducing-phl-navys-cutter-brp-gregorio-del-pilar/. Retrieved June 14, 2011. 
  21. 21.0 21.1 21.2 21.3 "Newest Philippine Navy Ship Gets Aloha Welcome". MENAFN.com. MENAFN.com. July 28, 2011. http://www.menafn.com/qn_news_story.asp?storyid={55f78fbe-e988-4bac-ac1d-e22b1b5584ad}. Retrieved July 31, 2011. 
  22. 22.0 22.1 "Introducing: Philippine warship to stop in Hawaii before patrolling Spratly Islands". Star Advertiser Honolulu. August 2011. http://www.staradvertiser.com/news/breaking/126233563.html/. Retrieved August 11, 2011. 
  23. "Navy's fastest ship sails to new homeport". Newsbreak. July 20, 2011. http://www.newsbreak.ph/2011/07/20/navy%E2%80%99s-fastest-ship-sails-to-new-homeport/. Retrieved July 31, 2011. 
  24. "Port Visits". SeaWaves Magazine website. August 2011. Archived from the original on July 16, 2011. https://web.archive.org/web/20110716025838/http://www.seawaves.com/portvisits.asp. Retrieved August 11, 2011. 
  25. "RP Navy ship visits Guam". Marianas Variety Guam Edition. August 15, 2011. http://mvguam.com/index.php?option=com_content&view=article&id=19426:rp-navy-ship-visits-guam&catid=1:guam-local-news&Itemid=61. Retrieved August 15, 2011. 
  26. Hamilton-icon-of-afps-capability.html "Navy's newest and largest ship arrives in the Philippines". The Manila Times. August 22, 2011. http://navytoday.blogspot.com/2011/08/Hamilton-icon-of-afps-capability.html. Retrieved August 22, 2011. 
  27. 27.0 27.1 "President Aquino: Ship symbol of our defense". Inquirer.net. August 24, 2011. http://newsinfo.inquirer.net/46823/president-aquino-ship-symbol-of-our-defense. Retrieved August 24, 2011. 
  28. "Noy inaugurates 2 newly commissioned ships". Philstar.com. December 15, 2011. http://www.philstar.com/Article.aspx?articleId=758532&publicationSubCategoryId=63. Retrieved December 15, 2011. 
  29. "Benigno S. Aquino III, Second State of the Nation Address, July 25, 2011 (English translation)". Official Gazette / Presidential Communications Development and Strategic Planning Office. July 25, 2011. https://www.officialgazette.gov.ph/2011/07/25/benigno-s-aquino-iii-second-state-of-the-nation-address-july-25-2011-en/. Retrieved August 8, 2011. 
  30. "Philippines Asserts Sovereignty Over Bajo de Masinloc (Scarborough Shoal)". Department of Foreign Affairs (Philippines). April 11, 2012. http://dfa.gov.ph/main/index.php/newsroom/dfa-releases/5164-philippines-asserts-sovereignty-over-panatag-scarborough-shoal. Retrieved May 29, 2012. 
  31. Barbara Mae Dacanay, "Philippines, China agree to resolve standoff", gulfnews.com, April 14, 2012 accessed April 13, 2012
  32. James Hookway, "Philippines Warns China in Naval Crisis", Wall Street Journal, April 11, 2012, accessed April 13, 2012
  33. Roy C. Mabasa & Aaron B. Recuenco, "PH Warship Pulls Out From Scarborough" Archived April 16, 2012, at the Wayback Machine., The Manila Bulletin, April 11, 2012, accessed June 9, 2012
  34. "PH joins SE Asia search for Malaysian plane". Rappler.com. March 8, 2014. http://www.rappler.com/nation/52493-ph-southeast-asia-search-malaysia-airlines-plane. Retrieved March 8, 2014. 
  35. "Sea rows ‘central issue’ in Obama Asia visit". The Manila Times. November 13, 2015. http://www.manilatimes.net/breaking_news/sea-rows-central-issue-in-obama-asia-visit/. Retrieved November 14, 2015. 
  36. Salinas, Mary Alice (November 17, 2015). "Obama Hones Focus on Trade, Economy at APEC Summit". Voice of America. http://www.voanews.com/content/obama-in-philippines-for-apec-summit/3061271.html. Retrieved December 25, 2015. 
  37. USCG Boutwell to be formally transferred to PN, to be renamed BRP Andres Bonifacio[dead link]
  38. "PHL Navy frigate ran aground in West Philippine Sea". GMA News. August 31, 2018. http://www.gmanetwork.com/news/news/nation/666088/phl-navy-frigate-ran-aground-in-west-philippine-sea/story/. Retrieved August 31, 2018. 
  39. Cayabyab, Zhander (September 4, 2018). "BRP Gregorio del Pilar removed from Hasa-Hasa shoal". ABS-CBNnews.com. https://news.abs-cbn.com/news/09/04/18/brp-gregorio-del-pilar-removed-from-hasa-hasa-shoal. Retrieved September 10, 2018. 
  40. Laude, Jaime (September 5, 2018). "BRP Gregorio del Pilar towed out of Hasa-Hasa Shoal". The Philippine STAR. https://www.philstar.com/headlines/2018/09/05/1848825/brp-gregorio-del-pilar-towed-out-hasa-hasa-shoal. Retrieved September 10, 2018. 
  41. "Anti-US group offers alternatives to defense agreements". April 29, 2014. http://www.gmanetwork.com/news/story/358870/news/nation/anti-us-group-offers-alternatives-to-defense-agreements. Retrieved April 30, 2014. 
  42. "BRP Gregorio del Pilar & USS Fitzgerald Conduct Instride Training". Facebook – US Embassy, Manila Philippines. August 22, 2011. http://www.facebook.com/media/set/?set=a.10150352830899623.404954.157551009622&type=1. Retrieved August 23, 2011. 
  43. Naval Forces Northern Luzon. "NAVAL FORCES NORTHERN LUZON CONDUCTS NAVAL EXERCISE". navy.mil.ph. Philippine Navy. Archived from the original on August 23, 2012. https://web.archive.org/web/20120823045138/http://www.navy.mil.ph/news.php?news_id=587&home=1. Retrieved August 21, 2012. 
  44. Asianet (April 9, 2013). "Balikatan to make PN, USN more 'interoperable'". GlobalPost International News. http://www.globalpost.com/dispatch/news/asianet/130409/balikatan-make-pn-usn-more-interoperable. Retrieved April 18, 2013. 
  45. "PHL Navy warship visits Lingayen,Pangasinan". http://balita.ph/2013/04/29/phls-most-modern-warship-delights-tourists-attending-pangasinan-pistay-dayat/. 
  46. Laude, Jaime (June 19, 2013). "Phl, US troops to hold drills near Panatag | Headlines, News, The Philippine Star". philstar.com. http://www.philstar.com/headlines/2013/06/19/955623/phl-us-troops-hold-drills-near-panatag. Retrieved March 10, 2015. 
  47. Philippines and US to conduct CARAT 2014 near South China Sea
  48. ""KOMODO 2018 | PH Navy contingent back home from naval exercise in Indonesia". http://dwdd.com.ph/2018/05/18/komodo-2018-ph-navy-contingent-back-home-from-naval-exercise-in-indonesia/. 

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