Introduction of the New Rajah Sulayman-class OPV of the Philippine Navy

Known initially as the HDP-2200+ Offshore Patrol Vessel design presented to the Philippine Navy by the South Korean shipbuilder HD Hyundai Heavy Industries, the offshore patrol vessel's introduction with its designated names and hull numbers gives insight on the background and historical significance of each vessel's name that will join the fleet in the future, from the time this article publishes.

IN THE NEWS

Here is a full image of officials of both the HD Hyundai Heavy Industries and the Armed Forces of the Philippines, posing in front of the newly launched BRP Rajah Sulayman (PS-20).
Image Source.

As the various government agencies and the rest of the country prepares to the 127th Independence Day celebration that took place on June 12, 2025, the Armed Forces of the Philippines and the Department of National Defense have this event go even further, even beyond the military marches that have took place in Quirino Grandstand near Rizal Park, Manila. This event encompasses an important event for the first vessel of its own class, as visitors have witnessed its launching ceremony.

It was June 11, 2025, when the launching of the Philippine Navy’s first offshore patrol vessel got launched in the HD Hyundai Heavy Industries facility in Ulsan, South Korea. On the ship’s hull, it bears the name of a chieftain before the Philippines even became an entity formed by Spanish colonization. 

On the said ship’s name is the BRP Rajah Sulayman, named after a Rajah that ruled over the Kingdom of Luzon before getting conquered by the Spaniards under the auspices of explorer Miguel Lopez de Legazpi.

Attended the launching ceremony are the officials of the South Korean shipyard, along with officials belonging to the Philippine government through its embassy in South Korea, representatives from the Department of National Defense, and the Chief of Staff of the Armed Forces of the Philippines Gen Romeo Brawner Jr., PA who represented the Philippine military. In a speech, he said that the launch of the first OPV is not merely the unveiling of a new ship, that it is a declaration of AFP’s commitment for maritime security.

It symbolizes the ever-increasing bilateral ties between South Korea and the Philippines, whereby both countries elevated their ties into a full strategic partnership, with an agreement taking place in October 2024. The agreement underscores the need to expand defense and security relations of both countries, which also means getting into future agreements that go similarly to the purchase of offshore patrol vessels of the Philippine Navy, now named as the Rajah Sulayman-class OPVs.

The vessel ordered has its design derived from the HDP-2200+ concept presented by the HD Hyundai Heavy Industries, with specifications specially suited for the Philippine Navy requirements for an Offshore Patrol Vessel or an OPV. Initially, being the HDP-1500 design and then the HDP-2400, the Rajah Sulayman-class came with basic sensor system and armaments that usually come with a ship of this configuration. The said South Korean shipbuilder also markets the design to the Philippine Coast Guard during ADAS 2024.

As the first ship gets named and launched, so does the question of what will be the names of the remaining offshore patrol vessels that the Philippine Navy ordered in South Korea’s HD Hyundai Heavy Industries. 

This article will provide the details on the naming of the remaining offshore patrol vessels, which are all referring to chieftains of Rajahs and Datus in title, while providing updates to the information relating to the offshore patrol vessels that the Philippine Navy will probably receive starting next year.

For this topic, the discussion will first present an overview of the names of the remaining vessels of the Philippine Navy, while giving background of vessels that bear the same name before the Revised AFP Modernization Program taking place, starting from the 2010s up to present. 

Ultimately, the updates on the specifications and other relevant information will come presented in this article, giving a full perspective to the progress of the entire Offshore Patrol Vessel Acquisition Project of the Philippine Navy.

THE NAMING

The names and bow numbers of each Offshore Patrol Vessel belonging to the Rajah Sulayman-class.
From a Philippine Navy publication, shared on Pitz Defense Analysis.

In this new class of offshore patrol vessel, it is not surprising that the naming of the vessels will go after the country’s pre-Hispanic chieftains, as it provided additional historical significance of the said names to the resolve of the people to resist Spanish influence and power, in a place that will subsequently named as the Philippines. 

The bravery of the chieftains to protect their domains comes as a chain of resolve from the locals to keep on fighting, that the revolutionary heroes continue until the end of the Hispanic era.

On a Philippine Navy publication (see image above) on the Offshore Patrol Vessel Acquisition Project, the names and corresponding hull number of the vessels unfolded, providing a full overview of what to call on each of the six (6) offshore patrol vessels purchased. 

The following names are - BRP Rajah Sulayman (PS-20), BRP Rajah Lakandula (PS-21), BRP Rajah Humabon (PS-22), BRP Sultan Kudarat (PS-23), BRP Datu Marikudo (PS-24), and BRP Datu Sikatuna (PS-25).

First, it corroborated the classification convention that the Philippine Navy has in the present time this article has published, as it will have frigates with hull numbers from zero-six (06) to nineteen (19) with the first two (2) filled with both BRP Miguel Malvar (FFG-06) and BRP Diego Silang (FFG-07). 

The offshore patrol vessels will have a hull number designation from twenty (20) to twenty-nine (29), six (6) of which are now covered by the new Rajah Sulayman-class OPVs bought from South Korea.

All the names of the ships mentioned have used before in other vessels that were once commissioned in the Philippine Navy fleet, which basically means that all the names in the offshore patrol vessels ordered by the naval service branch of the Armed Forces of the Philippines from South Korea’s HD Hyundai Heavy Industries will use for the second time, bearing it to the brand new vessels that continue the legacy of the old ones, most of were from Second World War era.

Out of the six (6) names used for naming the HDP-2200+ offshore patrol vessels of the Philippine Navy, four (4) were names of the fleet’s frigates or destroyer escorts prior to the 1970s reclassification, and the remaining two (2) were names of ex-Malvar-class patrol corvettes. 

Going further, RPS Rajah Soliman was once a Buckley-class destroyer escort, BRP Rajah Lakandula was once an Edsall-class destroyer escort, and both BRP Rajah Humabon and BRP Datu Sikatuna were both Cannon-class destroyer escorts.

All the mentioned ships have once served in the United States Navy in the Second World War, of which this was eventually turned over to the Philippine Navy and since then became the mainstay composition of the Philippine fleet before modernization comes into mind from the Revised AFP Modernization Program in 2012, with the Jacinto-class Patrol Vessels being the most modern and advanced vessels of the time. This has then changed when the entire Philippine fleet saw modern warships serving in its inventory.

As discussing each name of the ships will only make this writeup even longer, the details will instead focus on each class of ships that was part of the Philippine Navy fleet, shortening the discussion into just four (4) types - the Buckley-class destroyer escort (frigate), the Edsall-class destroyer escort (frigate), the two (2) Cannon-class destroyer escort (frigate), and the two (2) Malvar-class patrol corvettes. All of which have their own stories of active service in the Philippine Navy’s fleet.

THE RPS RAJAH SOLIMAN (D-66)

The ship in the image come as one of the Philippine Navy frigates in the fleet.
(c) GorioB, Flickr.

Before the flagship of new offshore patrol vessels of the Philippine Navy now bearing this name, albeit more Filipino in pronunciation, this vessel and its namesake deserves a mention and detailed discussion in this writeup, as it gives an added knowledge of the country’s service branch using these names on naval vessels transferred to the Philippine fleet, even before the idea of buying brand new offshore patrol vessels became a trend in the service branch’s contemporary times.

The story started in the Second World War, whereby the United States Navy commissioned the USS Bowers (DE-637), a Buckley-class Destroyer Escort with a full service record involving its operational and mission related achievements in the Asia-Pacific theater of operations during the said conflict on a global scale. 

From the Battle of Leyte Gulf to the Battle of Okinawa, the said destroyer escort gallantly took part in the war effort that aimed to eliminate the threat of Japanese imperialism as of that time.

The first casualty involving the said warship in combat took place on April 16, 1945, whereby a Japanese aircraft conducted a Kamikaze charge against the destroyer escort, resulting in the casualty of thirty-seven (37) of its crew. 

Since then, it got converted into a High Speed Attack Transport vessel that belonged to the Charles Lawrence-class, and it remained that way for a decade and a half, until the vessel eventually turned over to the Philippine Navy in 1961 that it became the RPS Rajah Soliman (D-66).

Being the largest vessel that the Philippine Navy had during that time in the 1960s, the RPS Rajah Soliman (D-66) has a length of 93.3 meters, a beam of 11.1 meters, and a draft of 3.4 meters. By modern standards, this ship's size comes almost at par with the modern Rajah Sulayman-class offshore patrol vessels that get discussed in this writeup, with the latter being slightly larger. The largest vessel in the fleet as of this time is the Tarlac-class Landing Docks, with a length of around 123 meters and a beam of 21.8 meters.

While both aforementioned ships have almost similar size, things are not that similar in terms of fitted armaments onboard, as the old RPS Rajah Soliman (D-66) comes with depth charge racks and torpedo tubes onboard that can carry 21-inch torpedoes, making this vessel capable to conduct anti-submarine operations that count as a significant capability of that time, only regained with the entry of both Jose Rizal and Miguel Malvar-class frigates in the Philippine Navy fleet as of recent.

The old RPS Rajah Soliman (D-66) served in the Philippine Navy fleet from its entry in 1961 to its demise in 1964, when the Typhoon Winnie (local name: Dading) pummeling the shores of the country, especially the repair facility that the aforementioned destroyer escort got situated during the storm. 

The battering waves that came out from that typhoon rendered the vessel unserviceable, counted as beyond economical repair that made it eventually sold for scrap in 1966. 

It took the Philippine Navy almost six (6) decades to have a ship getting named to this specific pre-colonial chieftain once again, this time having its spelling more native to the Filipino language and also became the name of the entire class of offshore patrol vessels that the naval service branch of the Armed Forces of the Philippines will receive in the latter part of the decade from the day this writeup publishes. The next one will also refer to another single class of destroyer escort serving the fleet.

THE BRP RAJAH LAKANDULA (PF-4)

The Edsall-class BRP Rajah Lakandula (PF-4) is in the foreground, with the BRP Andres Bonifacio (PF-7) in the background.
Image retrieved from Wikimedia Commons.

This ship, like the RPS Rajah Soliman (D-66), was also a warship that solely belong to its own class of warship that have served the Philippine Navy, and like the aforementioned 1960s-era destroyer escort, have only served the naval service branch of the Philippine Armed Forces’ offshore combat force fleet for a medium amount time, at least actively for twelve (12) years. The BRP Rajah Lakandula (PF-4) was a sole Edsall-class destroyer escort that served the Philippine Navy from 1976 to 1988.

As a vessel, it served most of its time within the United States Navy as the USS Camp (DE-251), a destroyer escort vessel that provided additional protection on the Atlantic convoy that supplied European war effort against Nazi Germany through the United Kingdom during the Second World War. 

Built and commissioned in 1943, it provided support in the logistics chain by countering threats posed by German U-Boats that aimed to disrupt the entire war supply chain by sinking the convoy vessels carrying goods.

After the war, the USS Camp (DE-251) reclassified into a training ship in Pearl Harbor in 1945, until the ship decommissioned from active duty on May 1, 1946. The ship recommissioned back into service as the radar picket ship USS Camp (DER-251), providing an early warning system that expands coverage of detecting foreign aircraft that enters the expanded area of responsibility, similar to how airborne warning and control systems or AWACS perform in today’s battlefield environment.

It served as a radar picket ship platform until it officially turned over to the South Vietnamese Navy in 1971 as the RVNS Tran Hung Dao (HQ-1), where it served the fleet for four (4) years until the country it served surrendered after the successful takeover and reunification as accomplished by the communist North Vietnam. The said South Vietnamese frigate escaped to the Philippines, where the Philippine Navy gained the ship as the BRP Rajah Lakandula (PF-4).

One notable mission that the ship took part was with its patrol operation in the Basilan Strait’s Sangbay Island on October 7, 1980, when its crew draw into a battle with armed pirates in the island, resulting to the casualty of the Medal of Valor recipient Ensign Albert V Majini, whose name now emblazoned on an Acero-class Fast Attack Interdiction Craft - Missile (FAIC-M) of the Philippine Navy, a way to show testament on his heroism against a threat that attempted to pin down BRP Rajah Lakandula (PF-4).

Being an Edsall-class destroyer escort, the USS Camp has the following specifications, whereby its size comes with 93.27 meters long, 11.15 meters wide, and 3.73 meters draft. 

For comparison, the Rajah Sulayman-class offshore patrol vessels are slightly larger and almost on a par with the provided size dimensions, but take note that being a destroyer escort, the BRP Rajah Lakandula has torpedo tubes and depth charge racks fitted onboard, along with capable anti-aircraft guns that makes it a formidable vessel of its time.

The BRP Rajah Lakandula, after twelve (12) years of actively serving the Philippine Navy, gets decommissioned in 1988, and since then served as the stationary barracks ship for the fleet until it eventually sold for scrap sometime between the late 1990s and the early 2000s. Since then, it took the Philippine Navy at least two and a half (2 ½) decades for its leadership to reuse the name for the second time, with this one now named on the country’s second HDP-2200+ derived offshore patrol vessel.

THE TWO (2) PHL NAVY CANNON-CLASS DESTROYER ESCORTS

This was once a flagship of the Philippine Navy's fleet, until the entry of the former Hamilton-class cutter BRP Gregorio del Pilar (PF-15/PS-15), then a patrol frigate (now an offshore patrol vessel).
Image retrieved from Wikimedia Commons.

The following two (2) Cannon-class destroyer escorts discussed bears the name that the new offshore patrol vessels will soon have, out of three (3) vessels that belong to this class of vessels that all bear the names of pre-Hispanic chieftains of the Philippines. 

The portion of this subtopic will also encompass the reason that the name of one of the Cannon-class ships, BRP Datu Kalantiaw, does not end up included in this final list of names of the Philippine Navy’s new offshore patrol vessels.

Setting aside BRP Datu Kalantiaw comes the other two (2) Cannon-class destroyer escorts that bears the name that two (2) of the upcoming HDP-2200+ offshore patrol vessels will soon have, which are the vessels BRP Datu Sikatuna (PF-5) and BRP Rajah Humabon (PF-6), then (PF/PS-11). 

Getting back to the BRP Datu Kalantiaw, the reason this name did not end up included was because of its pseudo-historical nature of the personality, suggesting that there was actually no Datu Kalantiaw existed, and was rather a hoax.

Going back to the two (2) vessels named BRP Datu Sikatuna and BRP Rajah Humabon, its service history with the Philippine Navy began when the aforementioned destroyer escorts, once operated by Japan Maritime Self-Defense Force as JDS Asahi (DE-262) and JDS Hatsuhi (DE-263), both defined the Asahi-class destroyer escorts of the Japanese fleet before the formal turn-over of the vessels to the Philippine fleet on the day of September 13, 1976.

Still going further back into history, both the said Cannon-class destroyer escorts served the United States Navy as the USS Amick (DE-168), and USS Atherton (DE-169), both serving in the Second World War as part of the fleet that pushes the United States war effort to put both the Japanese Empire and Nazi Germany into eventual defeat. Both vessels officially got launched into the water on May 27, 1943, with gaps in months of the commissioning of the aforementioned destroyer escorts into the fleet within the said year.

While both vessels share the same year of getting commissioned into active duty, the same cannot say in the number of years that both vessels served on three navies, from the United States Navy, then the Japan Maritime Self-Defense Force or JMSDF, and eventually in the Philippine Navy service where both vessels saw maximizing its function in the fleet until decommissioning. The gap of decommissioning between both the BRP Datu Sikatuna and the BRP Rajah Humabon has spanned for at almost thirty (30) years.

The BRP Datu Sikatuna (PF-5) decommissioned first in 1989, likely due that there are only two (2) Cannon-class destroyer escorts, then named as Kalantiaw-class patrol frigates in service that spare parts hulk for this class of ships becoming more scarce, making the cannibalization of the vessel as a spare parts hulk more likely to ensure that the remaining ship of this class in service, the BRP Rajah Humabon, fully operational.

Decommissioning BRP Datu Sikatuna (PF-5) enabled the BRP Rajah Humabon (PF/PS-11) to operate for at least twenty-nine (29) years in the fleet, with the ship being the flagship of the Philippine Navy from the late 90s up to the early 2010s, when the first ex-Hamilton class cutter BRP Gregorio del Pilar (PF/PS-15) entered active service within the fleet. As the Philippine Navy modernizes its fleet up to the standards of the time, the BRP Rajah Humabon decommissioned from active service on March 15, 2018.

BRP SULTAN KUDARAT AND BRP DATU MARIKUDO

The BRP Sultan Kudarat (PS-22) was once part of the Malvar-class patrol corvettes.
Photo by Mike Baylon, from Navsource.

Both of the vessels belonged to what has named as the ‘Malvar-class patrol corvettes’, which was the Philippine Navy’s mainstay patrol platform before the Revised AFP Modernization Program helped the service branch securing its newer vessels and rendering most of the vessels belonging to this class getting decommissioned from active duty. Both vessels aforementioned belong to this specific class of patrol vessels that were once known as the PCE patrol crafts from the United States Navy.

The BRP Sultan Kudarat (PS-22) was a PCE-842-class patrol craft made for the United States Navy in the Second World War, bearing the name PCE-895 at the day of its commissioning on October 30, 1944. Then it became known to be the USS Crestview (PCE-895) on February 15, 1956. 

Like the BRP Rajah Lakandula (PF-4), the USS Crestview then served in the South Vietnamese Navy as the Dong Da II (HQ 07), until it evacuated to the Philippines after its fall in 1975.

Meanwhile, the BRP Datu Marikudo (PS-23) was a PCE(R)-489-class patrol craft made for the United States, also used in the Second World War as the PCE(R)-853 upon commissioning on June 16, 1944. 

Then it received its new name as the USS Amherst (PCE(R)-853 on February 15, 1956, a training reserve ship intended to provide skills to the naval reservists of the Forth (4th) Naval District in Philadelphia, in the state of Pennsylvania. It changed hands like its sistership, the BRP Sultan Kudarat.

Still talking about the BRP Datu Marikudo (PS-23), it then served in the South Vietnamese Navy as the Van Kiep (HQ 14), where they became the second user of the vessel on June 3, 1970 in its turn-over from the United States Navy, when the ship got struck out from the registry. It served for at least five (5) years, until the Vietnamese government fell in 1975, where alongside the then future BRP Sultan Kudarat (PS-22) and BRP Rajah Lakandula (PF-4), evacuated to the Philippines.

Both the BRP Sultan Kudarat (PS-22) and BRP Datu Marikudo (PS-23) entered the Philippine Navy on April 5, 1976, as the RPS Sultan Kudarat and RPS Datu Marikudo, until the prefix got its revision into the current one in the 1980s. 

Both served the fleet as the mainstay patrol vessels all throughout the 1990s up to the early 2010s, where the fleet experienced a transformation resulting from the materialization of the Revised AFP Modernization Program.

The BRP Datu Marikudo first decommissioned from active duty, citing the vessel’s age, in December 2010, at the time that the Philippine Navy was in poor shape and the idea of having modernized vessels, aside from the Jacinto-class patrol vessels already in service, was still a distant dream. 

The BRP Sultan Kudarat (PS-22) decommissioned nine (9) years later, on July 5, 2019, slowly putting out the remaining World War 2 era vessels from the fleet, until the replacements came in six (6) years later.

Now, both names will get used for a second time, which will come with the upcoming six (6) Rajah Sulayman-class offshore patrol vessels produced by HD Hyundai Heavy Industries for the Philippine Navy’s modernization requirements. 

Seeing this, the new ships that bear the same name will also bear the operational legacy brought by the older Malvar-class patrol vessels that came before it, continuing the always constant mandate of securing the country’s maritime interests.

SUMMARY

An updated version of the infographic, featuring the names of the vessels.
Pitz Defense Analysis file image.

Once known as the HDP-1500, then the HDP-2400 variant, the Philippine Navy’s Rajah Sulayman-class offshore patrol vessels officially derive itself from the HDP-2200+ Offshore Patrol Vessels as marketed by HD Hyundai Heavy Industries, itself going differently to its slightly different product line that is the HDP-2200 variant. The latter, as discussed in this website, are the ones offered by the said South Korean shipbuilder to the Philippine Coast Guard during the 2024 ADAS Exhibition.

The stories of the names presented were referring to the ships that have once served the Philippine Navy of the old, whereby all of it served as a United States Navy vessel during the Second World War, with two (2) of it transferred from the Japan Maritime Self-Defense Force in the meantime, until it served in the Philippine Navy fleet for a final time. The same goes with the ones that have served with the South Vietnamese Navy vessels that sought escape to the country after their motherland collapsed in 1975.

Bearing the names of the pre-Hispanic chieftains come with it the prestige of a growing Philippine Navy fleet, with the Offshore Combat Force surely getting the six (6) offshore patrol vessels under this acquisition project. 

It bears the names of its namesakes, all of which bear a reputation of bravery and reputation of the said chieftains against the attempts of domination by the old colonials, or bearing a reputation of flourishing of pre-colonial communities before getting a strong pact with the Spanish.

It will join the fleet that will complement the other offshore patrol vessels that form part of the Offshore Combat Force, notably the Del Pilar-class offshore patrol vessels that were once the Hamilton-class cutters of the Philippine Coast Guard, and the Jacinto-class patrol vessels that were once the Hong Kong-based Peacock-class vessels that have served the British Royal Navy. This soared the number of offshore patrol vessels of the fleet to at least twelve (12) vessels upon the completion of delivery.

Of course, not to mention are the main combatants of the fleet, namely the Jose Rizal and Miguel Malvar-class frigate, along with the sole BRP Conrado Yap (PS-30), which itself is the single Pohang-class corvette that currently serves the Philippine fleet. 

To date, the construction of Rajah Sulayman-class offshore patrol vessels increases the number of warship exports made by HD Hyundai Heavy Industries to at least ten (10) vessels, with likely more to come in the next couple of years.

As the BRP Rajah Sulayman getting launched on June 2025, it signifies the start of the new class of offshore patrol vessels that will fully serve the Philippine Navy in the upcoming decades, gallantly patrolling and securing the country’s territorial and EEZ waters by providing an added presence in crucial areas like the West Philippine Sea. The vessels might go hand in hand with the Philippine Coast Guard’s own vessels in establishing an expanded Maritime Domain Awareness or MDA in its own waters.

As reported, the Rajah Sulayman-class offshore patrol vessels will have its delivery fully completed by year 2028, in which it will significantly increase the number of vessels in the Philippine Navy with the number of units specified in the contract. 

The increase is a welcoming development as the fleet needs more hulls for an effective operation of constantly providing a presence in the country’s vast waters that connect its archipelagic geographical construct. 

(c) 2025 PDA.

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