CAPITAL WARSHIPS

del Pilar class | Humabon class | Pohang class | Rizal class | Jacinto class | Malvar class | Alvarez class

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del Pilar (Hamilton) class High Endurance Cutter (WHEC)/ Frigate (2+ 0 + 1)

PF 15 BRP Gregorio del Pilar (ex USCGC Hamilton WHEC 715)
PF 16 BRP Ramon Alcaraz (ex USCGC Dallas WHEC 716)
PF ?? BRP ?? (ex USCGC Boutwell WHEC 719)

Type: Frigate
Displacement, full load: 3,300 (3,050 T standard)
Dimensions: 115.2 m x 13.1 m x 6.1 m (378' x 42.8' x 20')
Flight Deck: 26.8 m x 12.2 m (88' x 40')
Main Machinery: CODOG; 2 x 3,500 shp (2.61 mW) Fairbanks-Morse 38TD8-1/8 12 cylinder O-P twin turbocharged and supercharged diesels for cruising; 2 x 18,000 shp (13.43 mW) Pratt & Whitney FT-4A-6 gas turbines for boost; 1 x General Electric 350 hp (261 kW), Omni directional and fully retractable Bow Propulsion Unit; 2 x 550 kW, 400 amp auxilliary diesel generators; 1 x 500 kW, 400 amp emergency gas turbine (EGT) generator Emergency Power
Speed: 12 knts (1 diesel, 120 srpm); 17 knts (2 diesels, 140 srpm); 22 knts (1 gas turbine, 200 srpm); 29 knts (2 gas turbines, 235 srpm); 5 knts (Bow Prop Only, 575 rpm)
Range: [max] km (nm); [cruising] 25,928 km (14,000 nm at 12 knts)
Complement:
90 (19 Officers + 71 Ratings)
Weapon Systems
Main Gun:
1 x Mk. 75 3" OTO DP (76 mm) bow
Range: 16 km (8.7 nm); [AA] 12 km (6.6 nm)
Rate of Fire:
80 rpm automatic
Gunfire Control System:
Mk. 92 Fire Control
Rangefinder:

Secondary Gun: [PF-15] 1 x M-242 25 mm Bushmaster chain gun in a Mk. 38 mount aft; [PF-16] 2 x Mk 38 Mod 2 amidship
Range: 2 km
Rate of Fire:
[max] 180 rpm
Gunfire Control System:
Manual or Electric; [Mk 38 Mod 2] Toplite FCS
Rangefinder:
Electro-optical
Tertiary Gun:
2 x Mk. 16 20 mm amidship
Range:
[max eff] 1.83 km (1.14 mi)
Rate of Fire:
[cyclic] 600-850 rpm
Gunfire Control System:
Manual
Rangefinder:
Optical
Other Defenses:
4-6 x 12.7 mm HMG; 2 x fixed Loral Hycor Mark 36 Mod 7 Super Rapid Bloom Off-board Chaff (SRBOC) system launchers, 6-barrels IR flares and chaff
Radars
Surface Search:
Range:
Fire Control:
Sperry Mk. 92 I/J Band
TACAN:
Air Search:
Early Warning:
Navigation:
Sonar:
Combat Data Systems:
Weapons control:
Mk. 92 Mod 1 GFCS
Others:
MF, HF, VHF, UHF Communications (Line of Sight & Satellite)
Aviation:
midships helicopter deck with hangar and Talon hauldown system
Builders:
Avondale SY, New Orleans; FRAM at Todd Pacific SY, Seattle and Bath Iron Works
Year(Laid Down/First Commissioned/Commissioned in PN): PF15 January 1965/ 20 Feb 1967/ 14 December 2011; PF16 7 Feb 1966/ 1 Oct 1967/ October 2013;
Program: First large US gas turbine ships. Large frigate-like patrol ships, intended for open-ocean, long-range operations. Diesels provide long endurance, with gas turbines for sprint operations. Underwent major mid-life modernizations (FRAM) 1985-1992, work included standardizing the engineering plants, improving the clutching systems, replacing the SPS-29 air search radar with SPS-40 radar, and replacing the 5"/38 gun mount and Mk.56 GFCS with the OTO Melara 76 mm compact and Mk.92 GFCS. Phalanx CIWS fitted by late 1993. The flight deck and other aircraft facilities upgraded to handle Jay Hawk helicopters including a telescopic hangar. URN-25 TACAN added along with the SQR-4 and SQR-17 sonobuoy receiving set and passive acoustic analysis systems. SBROC chaff launchers were also fitted but not improved ESM which have been shelved. All missiles, torpedo tubes, sonar and ASW equipment removed in 1993-94, to focus on Coast Guard role. Mk. 38 25 mm guns replaced the Mk. 67 20 mm guns. Shipboard Command and Control System (SCCS) fitted to all of the class by 1996. Surface search radar replaced by 1997-99. All Phalanx CIWS, 25 mm chain guns and radar systems (SPS-40E 2-D air search; WLR-1H(V)5, WLR-3 early warning, TACAN) removed prior to hot transfer to the PN on 13 May 2011 for Php 450 million under FMS. Second ship USCGC Dallas (WHEC 716) transferred on 2012. Refitted at a cost of $15.15M, which included a general overhaul of her port main diesel engine and the installation of navigational and electronics equipment, and a two $1.8M Mk 38 Mod 2 MGS which is designed to counter high-speed maneuvering surface targets or slow-flying aircraft. Currently the largest of the PN warships and PF-15 is the PN's flagship. Third WHEC, Boutwell sold to PN as EDA, early 2016.
Structure: Frigate-like design; powered by diesel engines and gas turbines, and have controllable-pitch propellers; helicopter deck and retractable hangar aft, originally carried a 5"/38 cal gun forward. The early gas turbine engines in these ships were inefficient. Underwent Fleet Renovation and Modernization (FRAM) life extensions 1985-1992 at Todd Shipyard in Seattle; work included engineering habitability and electronics, combat systems and communications improvements, all new armament, rehabilitation of helicopter facilities, new radars. Have clipper bows, twin funnels enclosing the helicopter deck, helicopter platform aft. Mast and superstructure is largely of Type 3456 aluminum construction, hull is of MIL-S-16216 (HY-100 and HY-80) welded steel. Bridge control of maneuvering is by aircraft-type joystick rather than wheel.

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Rajah Humabon (Cannon) class Destroyer Escort/ Frigate (1)

PF 11 BRP Rajah Humabon (ex USS Atherton DE 169; ex Hatsuhi DE 263; ex Rajah Humabon PF 6)

Type:
Light Frigate/Destroyer Escort
Displacement, full load:
(1,220 T standard); 1,620 T
Dimensions:
93.27 m x 11.15 m x 3.56 m (306' x 36' 6 " x 14' 9")
Main Machinery:
[uprated] 2 x 2,900 hp (2,150 kW) GM-EMD 16V-645E turbo diesel, 2 shafts; 2 x GM-EMD 8-268A auxilliary diesel, 200 kW generator, 1 x GM-EMD 3-268A auxilliary diesel , 100 kW generator; [original] 4 x 6,000 shp (4.5 mW) GM mod. 16-278A diesel electric, tandem motor drive, 2 shafts
Speed:
[max] 18 knts; [sustained] 16 knts; [cruising] 15 knts
Range:
[cruising] 11,112 km (6,000 nm at 14 knts)
Complement:
165
Weapon Systems
Main Gun:
3 x Mk. 22 3"/50 SP (76 mm)
Range:
12 km (6.6 nm)
Rate of Fire:
20 rpm
Gunfire Control System:
Mk. 52 GFCS
Rangefinder:
Mk. 51
Secondary Gun:
3 x Bofors Mk. 3 40 mm/56 (Twin)
Range:
11 km (5.9 nm); [AA] 7.16 km (3.87 nm)
Rate of Fire:
160 rpm
Gunfire Control System:
Mk. 51 Mod 2 GFCS
Rangefinder:
Optical
Tertiary Gun:
6 x Oerlikon Mk. 4 20 mm/70
Range:
2 km (1.06 nm)
Rate of Fire:
800 rpm
Gunfire Control System:
Rangefinder:
Optical
Other Defenses: 2 x 12.7 mm HMG; 2 x 81 mm mortars
Anti-submarine Mortar:
[original] 1 x Manual Mk. 10 Hedgehog (warhead 26 kg, 24 rockets)
Range:
350 m
Depth Charge:
[original] 1 x 8 K-gun Mk. 6 Projectors (warhead 150 kg)
Range:
160 m
Radars
Surface Search:
Raytheon SPS-5; G/H band
Range:
37 km (20 nm)
Navigation:
RCA/GE Mk. 26; I band
Sonar:
SQS 17B, hull-mounted, active search and attack, medium frequency
Builders:
Federal SB & DD, Newark, New Jersey
Year(Laid Down/First Commissioned/Commissioned in PN):
14 January 1943/ 29 August 1943/ 27 February 1980
Program:
The USN had six classes of destroyer escorts during WW II and the Cannon class was the longest-ranged DE (radar picket, long hull) ship at that time. They were constructed as ocean-going escort ships and about 70 ships of this class were constructed between 1942 and 1944. PF 11 (ex DE 169) commissioned in 29 August 1943, USN, operated under Task Force 62, on escort duty for transatlantic convoys, credited for sinking the German sub U-853 in 9 May 1945 during WW II and was awarded one battle star for WW II service. Decommissioned from USN on 10 December 1945. Served in Japan Maritime Self-Defense Force as DE 263, Hatsuhi from 14 June 1955 to June 1975, reverted to USN in 1975, then sold to the PN in 23 December 1978, officially commissioned in 27 February 1980 after she was towed to South Korea. Currently serving in the West Philippine Sea near the disputed Spratlys under the Philippine Fleet's Patrol Force.
Structure: Retired in 1993 but was reactivated in 1995-1996, where she had a minor refit, all ASW equipment removed including depth charge, torpedo tubes and sonar due to lack of available spare parts..
Modernization: Towed to Korea for modernization and overhaul, and additional guns were added before transferred to PN. Overhauled and re-engined in 1995. Further upgraded/ refurbished in 1998. Undergone extensive hull and engine overhaul in 2000 during the CARAT exercises with the assistance of USN ship USS Salvor. Additional electronics upgrades includes Furuno Satcom and a mast-mounted FLIR package.


Three views of the PN frigate PF 11 BRP Rajah Humabon.

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?? (Pohang) class Corvette Flight II (ASUW) (1)

PS BRP ?? (ex Mokpo PCC 759)

Type: Corvette
Displacement, full load: (950 T standard) 1220 T
Dimensions: 88.3 m x 10 m x 3 m (289' 8" x 32' 10" x 9' 6")
Main Machinery: CODOG 2 x 3,130 bhp ( mW) MTU 12V956 TB82 diesels, 2 shafts; 1 x 27,200 shp GE LM-2500 gas turbine; 2 x CP props; 1.2 mW electric sets
Speed: 31 knts (15 knts, diesels)
Range: [cruising] 4,000 mi (at 15 knts); 800 mi (at 31 knts, gas turbine)
Complement: 95 (10 Officers + 85 Ratings)
Weapon Systems
SSM: 2 x Aerospatiale MM 38 Exocet; inertial cruise; active radar homing
Range: 42 km (23 nm) at Mach 0.9
Warhead: 2.27 kg
Main Gun: 1 x 3" OTO Melara Compact DP (76 mm)
Range: 16 km (8.7 nm); [AA] 12 km (6.6 nm)
Rate of Fire: 45 rpm automatic
Gunfire Control System: Thales WM-28 I/J Band
Rangefinder:
Secondary Gun: 2 x Emerlec 30 mm (twin)
Range:
Rate of Fire: rpm
Gunfire Control System:
Rangefinder:
Elevation:
Tertiary Gun:
Range:
Rate of Fire: rpm
Gunfire Control System:
Rangefinder:
Elevation:
Torpedeos: 6 x 324 mm Mk 32 ASW (triple tubes); Honeywell Mk 46 anti submarine actice/ passive homing to 11 km (5.9 nm) at 40 kts; warhead 44 kg)
Depth charges: 2 x Mk 9 DC racks
Other Defenses: 4 MEL Protean fixed launchers; 36 grenades
Radars
Surface Search: SPS-64(V)
Range:
Navigation:
Sonar: Signaal PHS-32 hull-mounted active search and attack medium frequency
Combat Data Systems: Signaal Sewaco ZK
ECM:
Thorn EMI or Nobel/Tech
Builders: Daewoo S&M Engineering, Okpo
Year(Laid Down/First Commissioned/Commissioned in PN): / August 1986/ ?? 2016
Program:
Structure:
Operational:
Combat Systems: Thales SEWACO ZK combat data systems; manned 30 mm AA mount on the fantail in place of the aft 76 mm mount. Equipped with Thales LIOD optronic director for the 76 mm guns, with the 30 mm essentially locally controlled. Also carries Motorola MX 1105 NAVSAT, SRN 15 TACAN

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Rizal (Auk) class Minesweeper/Patrol Corvette (2)

PS 70 BRP Manuel Quezon (ex HMS Exploit BAM 24; ex USS Vigilance AM/MSF 324)
PS 74 BRP Jose Rizal (ex USS Murrelet AM/MSF 372; ex Jose Rizal PCE/PS 69)

Type:
Corvette/Light Frigate
Displacement, full load:
(1,090 T, standard) 1,250 T
Dimensions:
69.75 m x 9.82 m x 3.28 m (228.79' x 32.21' x 10.8')
Main Machinery:
[uprated] 2 x 2,900 hp (2,150 kW) GM-EMD 16V-645E turbo diesel, 2 shafts, 2 x GM-EMD 8-268A auxilliary diesel, 200 kW generator, 1 x GM-EMD 3-268A auxilliary diesel , 100 kW generator; [original] 2 x 3,532 hp GM 12-278 diesel electric drive engines, [PS 70] Farrel-Birmingham single reduction gear, 2 shafts [PS 74] Westinghouse single reduction gear, 2 shafts
Speed:
[max] 18 knts; [cruising] 12 knts
Range:
10,545 km (5,694 nm)
Complement:
5 Officers + 75 Ratings
Weapon Systems
Main Gun:
2 x Mk. 26 3"/50 SP (76 mm)
Range:
12 km (6.6 nm)
Rate of Fire:
20 rpm
Gunfire Control System:
Mk. 52 GFCS
Rangefinder:
Secondary Gun:
2 x Bofors Mk. 3 40 mm/56 (Twin)
Range:
11 km (5.9 nm); [AA] 7.16 km (3.87 nm)
Rate of Fire:
160 rpm
Gunfire Control System:
Mk. 51 GFCS
Rangefinder:
Optical
Tertiary Gun:
2 x Oerlikon Mk. 4 20 mm (Twin)
Range:
2 km (1.06 nm)
Rate of Fire:
800 rpm
Gunfire Control System:
Rangefinder:
Optical
Other Defenses: 2 x 12.7 mm HMG
Torpedoes:
[original] 3 x 324 mm Mk. 32 triple tubes, Mk. 44 anti-submarine active homing (warhead 26 kg)
Range:
5.5 km (3 nm)
Speed:
30 knts
Anti-submarine Mortars:
[original] 1 x Mk. 10 Manual Hedgehog (warhead 26 kg, 24 rockets)
Range:
350 m
Depth Charge:
2 x Mk. 9 Racks
Range:
Radars
Surface Search:
Raytheon SPS-5C; G/H band
Range:
37 km (20 nm)
Navigation:
DAS 3; I band
Sonar:
Tarcan55 b4-a; SQS-17B, hull-mounted, active search and attack, high frequency
Aircrafts:
MBB BO-105C (PS 70 only)
Builders:
Associated SB, Seattle, Washington (PS 70); Savannah Machinery & Foundry Co., Savannah, Georgia (PS 74)
Year(Laid Down/First Commissioned/Commissioned in PN):
PS 70 28 November 1942/ 28 February 1944/ 19 June 1967; PS 74 24 August 1944/ 24 August 1945/ 18 June 1965
Program:
Ex USN fleet minesweepers, and were the first class of ocean-going minesweepers designed during WW II. PS 74 (ex AM 372) served in minesweeping operations in Japanese and Korean waters in 1946, participated during the Korean crisis until December 1953, redesignated MSF 372 in 7 February 1955, decommissioned from USN in 1957, transferred to the PN under military assistance program in 18 June 1965 as PCE 69, reclassified as PS 69, then PS 74. PS 70 (ex AM 324), originally laid down for the Royal Navy as HMS Exploit BAM 24, but the USN decided to keep her. Generally served as an escort, minesweeper and AA/ASW patrol. Part of MinRon 4 during the invasion at Okinawa, gunning down several Japanese aircrafts, providing support to damaged ships and rescuing survivors. Assigned to Task Unit 39.11.4, afterwards until the Japanese surrendered and was then based in Japan during the occupation. Decommissioned on 30 January 1947 She was awarded three battle stars for her WW II service. She was reclassified as MSF 324 in 7 February 1955 and transferred to the PN as a grant aid on 19 August 1967. Both ships stricken in 1994 but returned to service in 1995-1996. PS 74 is among the most active of the PN WW II era ships. These ships serves in the Philippine Fleet's Patrol Force.
Structure: Upon transfer to the PN, the mine-sweeping equipment was removed and additional 1 x 3"/50 SP (76 mm) gun fitted aft (PS 74 only); additional anti-submarine weapons also fitted. PS 70 has bulwarks on iron decks to end of superstructure which PS 74 does not have. Now have a helicopter flight deck (but no facilities) in place of place of 3" gun.
Modernization:
Both ships overhauled in 1995 with assistance from Hatch & Kirk, which involved major engine parts replacements. Recent upgrades includes a satellite radio dish, for communications.



Three photos of the PN corvettes PS 70 BRP Manuel Quezon and PS 74 Jose Rizal.

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Jacinto (Peacock) class Patrol Corvette (3)

PS 35 BRP Emilio Jacinto (ex HMS Peacock P239)
PS 36 BRP Apolinario Mabini (ex HMS Plover P240)
PS 37 BRP Artemio Ricarte (ex HMS Starling P241)

Type:
Corvette
Displacement, full load:
763 T
Dimensions:
62.6 m x 10 m x 2.72 m (205.32' x 32.8' x 8.92')
Main Machinery:
2 x 7,094 bhp APE-Crossley SEMT-Pielstick PA6 V280 diesels, 2 shafts, 3 bladed props, 44 tons fuel; 1 x 181 shp Schottel S103 LSVEST drop-down, shrouded loiter prop
Speed:
28 knts (25 knts sustained)
Range:
4,630 km (2,500 nm) at 17 knts
Complement:
6 Officers + 25 Ratings (44 total accomodation)
Weapon Systems
Main Gun:
1 x OTO Melara 76 mm Compact DP
Range:
18 km (9.7 nm)
Rate of Fire:
80 rpm
Gunfire Control System:
[original] BAe GAS 7 Sea Archer Mk. 1 Electro Optical Director and GEC V3800 Thermal imager; [uprated] Ultra Electronics (Radamec) 1500 All-weather, Day and Night, Electro Optical Tracking, Surveillance and GFCS
Rangefinder:
Secondary Gun:
[uprated] 1 x MSI Defence System Ltd. 25 mm chain gun
Range:
Rate of Fire:
Gunfire Control System:
[uprated] Ultra Electronics (Radamec) 1500 All-weather, Day and Night, Electro Optical Tracking, Surveillance and GFCS
Rangefinder:
Tertiary Gun:
2 x Mk. 16 20 mm
Range:
Rate of Fire:
Gunfire Control System:
Manual
Rangefinder:
Optical
Other Defenses:
2 X 12.7 mm MG
Radars
Surface Search:
Kelvin Hughes Type 1006
Range:
Navigation:
Kelvin Hughes Type 1006
Sonar:
Builders:
Hall Russel, Aberdeen, Scotland, United Kingdom
Year(First Commissioned/Commissioned in PN):
PS 35 1983/ 1 August 1997; PS 36 1984/ 1 August 1997; PS 37 1984/ 1 August 1997
Program:
Commissioned in the Royal Navy in 1984 and originally formed the Hong Kong Squadron, sold to the Philippines upon the return of Hong Kong to China in 1998 for $20 million for all three including plans and IPR were transferred to the PN. These ships serves in the Philippine Fleet's Patrol Force.
Structure: Among the most modern capital surface ships of the PN. These ships are fully air-conditioned and were designed to stay at sea during rough weather. Bilge keels were deepened to correct rolling problems during moderate and heavy seas. Armed with OTO Melara 76 mm Compact DP, which can fire 6 kg shells in excess of 15 kilometers, carries 450 rounds of ammunition. They carry two additional Mk. 16 20 mm guns amidships. The ship also carries an aft crane and two, 30-knot Avon Searaider 5.4 m semi-rigid-hull Inflatable pursuit craft, which can carry six personnel.
Modernization: PN ordered nine units of generators for the JCPV which were procured through direct contracting, with Propmech Philippines as the contractor for a project price of Php 29.868 million, with all 9 generators delivered on June 2005. JCPV uprating to accommodate C4I systems. Phase 1 uprating (electronic and weapons systems) was undertaken through government-to-government contract with the UK, with the project being awarded to QinetiQ Ltd. of UK. Contract price is at Php 959.44 million. The project enabled the vessels to perform a greater number and variety of missions. The vessels were dry-docked at Keppel SY in Batangas where 97% of the spare parts have been delivered on 21 December 2005. It involved the installation of Ultra Electronics Command and Control Systems and Radamec 1500 optronic director with a daylight TV camera, thermal imaging camera and eyesafe laser rangefinder, and its integration with the existing refurbished 76 mm gun and the newly installed aft 25 mm gun. The system provides fire control for surface engagements with spotting corrections in both line and range and has an effective secondary self-defense anti-air capability. The Radamec 1500 can detect a small patrol boat at ranges in excess of 12 kilometers day or night and can perform in automatic or manual mode. It also involved the installation and integration of new navigation systems - Raytheon gyrocompasses, Sperry Marine Bridge Master E Series radar, GPS system, anemometer and EM logs. All ships have already undergone Phase I uprating by March 2006, resulted in the optimum utilization of precision enfilade naval gunfire to support land forces engaged in ISO and effective on-scene command and control platforms for SAR, anti-smuggling and anti-drug-trafficking operations. Phase II is for the marine engineering and propulsion upgrade, which includes the hull modifications and repair, overhaul of the main machinery including all electricals, control, monitoring and auxiliary systems and crew training. It has an approved budget of Php 354 million and the prime contractor is F.F. Cruz Marine Corp, by 2011 all ship have undergone Phase II Upgrade. Phase III is SLEP, which is still under bidding. Arming with SSMs in the future withheld due to top-weight problems.

The three new ex Peacock-class OPVs, PS 35-37 in anchorage on the left , and PS 35 and 37 at sea on the right

PS 35 BRP Emilio Jacinto firing its main gun on the left and the uprated PS 36 BRP Apolinario Mabini on the right.

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Malvar (Admirable/PCER 848/PCE 881) class Patrol Corvette (6)

PS 19 BRP Miguel Malvar (ex USS Brattleboro PCER/EPCER 852; ex Ngoc Hoi HQ 12)
PS 20 BRP Magat Salamat (ex USS Gayety AM/MSF 239; ex Chi Lang II HQ 8)
PS 22 BRP Sultan Kudarat (ex USS Crestview PCER 895; ex Dong Da II HQ 7)
PS 28 BRP Cebu (ex USS PCE 881)
PS 31 BRP Pangasinan (ex USS PCE 891)
PS 32 BRP Iloilo (ex USS PCE 897)

Type:
Corvette
Displacement, full load:
(764 T, standard); 880.8 T
Dimensions:
56.24 m x 10.26 m x 2.87 m (184' 6" x 33' 7 " x 9' 7")
Main Machinery:
[PS 20] 2 x 1,710 hp (1.28 mW) Cooper Bessemer GSB-8 diesels, National Supply Co. single reduction gear; 2 shafts; [PS 19, 22-32-] 2 x 2,200 hp (1.64 mW) GM 12-278A diesels, 2 shafts; 2 x GM-EMD 6-71 auxilliary diesels, 100 kW generator, 1 x GM-EMD 3-268A auxilliary diesel, 60 kW generator, Falk single reduction gear
Speed:
[max] 16 knts; [cruising] 10 knts
Range:
8,325 km (4,495 nm)
Complement:
8 officers + 77 Ratings
Weapon Systems
Main Gun:
1 x 3"/50 SP (76 mm)
Range:
12 km (6.6 nm)
Rate of Fire:
20 rpm
Gunfire Control System:
Rangefinder:
Secondary Gun:
2-6 x Bofors Mk. 3 40 mm/56 (Single or 1-3 Twin)
Range:
11 km (5.9 nm); [AA] 7.16 km (3.87 nm)
Rate of Fire:
160 rpm
Gunfire Control System:
Rangefinder:
Optical
Tertiary Gun:
2 x Oerlikon Mk. 16 20 mm/70
Range:
2 km (1.06 nm)
Rate of Fire:
800 rpm
Gunfire Control System:
Rangefinder:
Optical
Other Defenses: 4 x 12.7 HMG
Anti-submarine Mortar:
1 x Mk. 2 81 mm
Range:
Radars
Surface Search:
SPS-21D (PS 19); Sperry SPS-53A, I/J band (PS 20); Furuno (PS 22); SPS-50 (PS 23); CRM-NIA-75 (PS 29, 31, 32)
Range:
Navigation:
RCA SPN-18; I/J band
Sonar:
Builders:
Pullman Standard Car Manufacturing Co. Chicago, Illinois (PS 19); Winslow Marine Railway & SB Co., Seattle Washington (PS 20); Willamette Iron & Steel Co., Portland, Oregon (PS 22, PS 31, PS 32); Albina Engine and Machine Works, Portland Oregon (PS 28)
Year(Laid Down/First Commissioned/Commissioned in PN):
PS 19 28 October 1943/ 26 May 1944/ November 1976; PS 20 / 19 March 1944/ November 1975; PS 22 2 December 1942/ 30 October 1944/ November 1975; PS 28 11 August 1943/ 31 July 1944/ 1948; PS 31 / 15 June 1944/ 1975; PS 32 16 December 1942/ 6 January 1945/ July 1948
Program:
Part of the 122 ex-USN MSFs, PCEs and PCERs, all variations to the common Admirable class hull, designed as A/S convoy escorts and reclassified as Fleet Minesweepers (Steel Hull). Most had been transferred to South Vietnam, then escaped to the Philippines in 1975 during the fall of Saigon, and were subsequently sold. PS 19 (ex PCER 852) was first commissioned on 26 May 1944, reclassified as experimental PCER in 1946, named Brattleboro in 15 February 1956, transferred to Vietnam in 11 July 1956 as HQ 12 Ngoc Hoi, escaped and eventually sold the PN in 1975. PS 22 (ex PCE 895) first commissioned on 30 October 1944, named Crestview in 15 February 1956, transferred to Vietnam in 29 November 1961 as HQ 07 Dong Da II, escaped and eventually sold to the PN in 1975. PS 23 (ex PCER 853), served as an escort in the Leyte invasion, as an antisubmarine picket ship in Lingayen, as an escort during the assault on the Ryukyu during WW II, where she was awarded two battle stars for service. Spent time as a training ship afterwards and renamed Amherst in 1956. Transferred to South Vietnam in June 1970 and served as HQ 14 Van Kiep II until she escaped to the Philippines in 2 May 1975. PS 28 (ex PCE 881) first commissioned on 31 July 1944, transferred to the Philippines in July 1948. PS 32 (ex PCE 897) first commissioned on 6 January 1945, transferred to the Philippines in July 1948. These ships serves in the Philippine Fleet's Patrol Force.
Structure: PS 19-23 were originally fitted as rescue ships, PCER. PS 20 is of the Admirable class MSF the rest are PCER 848 or PCE 881class. All minesweeping and A/S equipment removed. There may be additional variations in the armament (PS 19 has two twin 40 mm, PS 20 has two 40 mm). Number of operational units unclear.
Modernization: All ships underwent major refit/overhauls between 1990-1997.

PN corvettes PS 19 BRP Miguel Malvar and PS 22 BRP Sultan Kudarat underway during fleet exercises.

A view of PS 28 BRP Cebu's bridge supertructure, left and PS 32 BRP Iloilo at dock, right. Thanks to Shonen Red and the IPMS site for the pic.

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Alvarez (Cyclone) class Patrol Craft (1)

PS 38 BRP General Mariano Alvarez (ex USS Cyclone PC 1; ex USCGC Cyclone WPC 1)

Type:
Large Patrol Craft/Special Operations Transport
Displacement, full load:
331 T
Dimensions:
54.57 m x 7.62 m x 2.44 m (179' x 25' x 8')
Main Machinery:
4 x 3,350 bhp Paxman Valenta 16CM Diesel, Model 16RP200M, 1,500 engine rpm, 4 shafts; 2 x 155 kW Caterpillar 3306 DIT series diesel sets
Speed:
[max] 35 knts; [cruising] 25 knts
Range:
957 km (517 nm) at 35 knots, 4,022 km (2,172 nm) at 12 knots
Complement:
4 Officers + 24 Ratings + 9 Commandos
Weapon Systems
Main Gun:
1 x M-242 25 mm Bushmaster low angle, chain gun with Mk. 19 Mod. 3 40 mm grenade launcher in a stabilized Mk. 96 mount aft and 1 x M-242 25 mm Bushmaster chain gun in a Mk. 38 mount bow
Range:
2.46 km
Rate of Fire:
175 rpm
Gunfire Control System:
Manual or Electric
Rangefinder:
Electro-optical
Secondary Gun:
4 x 12.7 mm HMG
Range:
1.8 km
Rate of Fire:
450 rpm
Elevation:
Gunfire Control System:
Manual
Rangefinder:
Optical
Other Defenses:
Mk. 52 Mod 0 chaff decoy RL system (2-6 rounds) Mk. 137 RL
Radars
Surface Search:
Sperry Rascar 3400C X-band and S-band
Range:
Navigation:
Sperry Rascar 3400C X-band and S-band
Early Warning:
APR-39(V)1 Privateer radar warning
Sonar:
Wesmar side-scanning, hull-mounted, HF sonar
Electro-Optical:
Marconi Vistar FLIR
Builders:
Bollinger Machine Shop & SY, Lockport, LA
Year(Laid Down/First Commissioned/Commissioned in PN):
22 June 1991/ 7 August 1993/ 6 March 2004
Program:
US-built ships, based on the British Vosper-Thoryncroft design (Province/Ramadan class missile craft) but with light armament, different superstructure and accommodations for SEAL team and delivery craft, among other changes. They were intended as replacement for seventeen ageing Sea Spectre Mk 3 for SEAL/SpecOps transport and support, but were too large to effectively serve in that role. Too cramped to accommodate additional weapons and have limited endurance for their size. Reassigned to USCG operational control, with Navy crews and Coast Guard boarding teams, for homeland defense missions. Designed to carry two 16 feet SEAL Combat Rubber Raiding Craft (CRRC) and one 18 feet Rigid Hull Inflatable Boat, but on completion carry only the RHIB. There is a recessed platform at the stern for swimmer debarking and embarking. Ammunition supply includes 2,000 rounds (25 mm), 2,000 rounds (12.7 mm), and 1,000 grenades (40 mm). PC 1 was commissioned as USS Cyclone, USN in 7 August 1993, transferred to USCG in 29 February 2000, which has not utilized it, refurbished and transferred to PN (including 2 years worth of spares) in 2004 as part of $115 million US military aid pledged by Washington, This ship costs $30 million and is the most modern ship in the ageing PN fleet. The primary mission of this ship is coastal patrol, interdiction and surveillance. This ship serves in the Philippine Fleet's Patrol Force.
Structure: Hull constructed from BS-4360 Grade 43A steel, superstructure constructed from 5086 aluminum alloy. Main propulsion is generated by four Paxman Valenta 16CM-16RP200M diesels, developing 3,350 bhp, driving 12.8 cm six-blade highly skewed, variable pitch and rake, NI-AL bronze MIL-B24480A, alloy 1 amendment 3 (nickel-aluminum-bronze alloy) propellers, with pitch ratio of 1.465 at 0.7 radius and designed by USN NSWCCD(Code 544 drawing number P-5237B). Four Reintjes WVS-2232 reduction gearbox, with a reduction ratio: 2.025:1. Fuel capacity is 47,772 liters (12,620 gallons). Oil capacity is 568 liters (150 gallons). Total air conditioning plants production, 83.33 kW. They can refuel at sea, using astern fueling rigs. Fully operational at Sea State 3 with cruising speed of 25 knots, with 50% fuel capacity. Ship can survive up to Sea State 5. Maximum ship endurance at 10 days. Electricity supplied by two Caterpillar Model 3306 DIT Series B, rating 150 kW @ 1,800 rpm. Reverse osmosis desalinators, having a 1,514 liters (400 gallons) capacity per day. Fresh water capacity is 4,701 liters (1,242 gallons).
Equipped with Vosper fin stabilization system and a stern wedge to improve trim at high speeds. Kevlar armor is fitted to the command space. The Sperry Vision 2100M combat system employs the navigational radars and the Sperry Voyage Management System integrated navigation and control system as a combat data suite. Navigation systems include GPS and Loran receivers. Radio gear includes LST-5C SATCOM/line of sight UHF transceiver, A5 Spectra VHF radio, ICM120 Marine Band radio, and RF 5000 HF, VRC-92A VHF, and VRC-83(V)2 VHF/UHF transceivers. AN/SAT-2A infrared signaling systems are fitted, and the Marconi Vistar stabilized FLIR sensor with integral low light level television camera is mounted on the mast. Have IFF transponder but no interrogation capability, and optionally available. Wesmar side-scanning hull-mounted HF sonar with the sonar transducer is retracted within the hull at speeds above 14 knts.
Modernization: Refitted by Bollinger Machine Shop and SY for the PN in 2005 and had its stern extended by nine feet to accommodate a deck ramp - which extends down to below the water line, for a 20 feet Rigid Hull Inflatable Boat (RHIB). PN plans to uprate main weapon with a heavier caliber.

PS 38 General Mariano Alvarez, the newest PN light corvette, photo taken in 2005 after she was delivered.

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