US Navy Cold War Frigates

US Navy Flag 150 Frigates 1955-1990

Introduction: Postwar USN ASW Policy

USN Frigates The entire array of destroyers and escort destroyers inherited from WW2 was reclassified "ocean escort" (provided they had the range). This was a definitive ASW-oriented path and either escort and fleet destroyers were converted into ASW specialists, the DER, DET and FRAM in the 1950s-60s. It was also thought to replace the immense fleet of coastal/short range PC/PCE boats with brand new ships, in limited serie but with mass production in mind.

But the problem that soon appeared with the WW2 ASW converted escorts and even the new ones, was speed, starting wth the very fast Soviet Whiskey-class, able to escape most ASW vessels fielded by the USN but fleet destroyers. The admiralty soon evaluated an escort was targeted to be at least capable of 27 knots, and the Dealeys were created with that in mind. But soon the arrival of the November class SNA -capable of 30+ knots- once again changed the requirements, and following classes would try to marry the best ASW array with range and speed, an always difficult combination. However plans for mass-building fast ASW vessels little time after the immense fleet of escort already consented during the war meant the Congress rejected it.

A few of the old Fletchers in the meantime, which had the required speed, were converted as DERs, and the remainder were left in reserve in case of an emergency. In case of war it still was hoped that the congress would approve fast conversions on the same model. The program as later was ditched and focus turned into a new generation of ASW sensors and weaponry. At best the Fletcher DERs seemed a stopgap solution.

Meanwhile the Gearing's own conversion undergone a program of hunter-killer groups, centered around a carrier. This was done through SOSUS contacts, and the carriers were reconverted Essex class ships. The FRAMs were in effect the first real mass-conversion, updated in detail and in concept, of the previous DERs. Increased ASW systems was done by sacrificing all AAW capability, therefore the ships became inadequate for convoy protection or regular task forces. Although still under the umbrella of "ocean escorts" they were in the 1960s, still very fast and had a longer range that frigates.

Specialized mass-production ships only led to limited series, either the Dealey and Claud Jones, as said above, tailored to be mass-produced in case of war. They had many shortcomings though -particularly in the case of the Claud Jones- and the solution evolved over time up to the more versatile, roomier and faster Knox. The intermediate solution was to use a large array of ASW planes and LAMPS helicopters for SOSUS.

USN cold war ASW weaponry

This evolution mirrored the progresses made in submarine design in this era, and sensors and weapons ranges evolved in concert. To the 1950s sonar range of 1500 yards, weaponry was adapted to an equally short range, 250 to 300 yards for the hedgehogs and 800 for the more sophisticated weapon Alfa, as well as homing ASW torpedoes. The SQS-4 sonar of the 1960s was capable of 5000 to 10,000 yards, and long-range weapnry took the shape of the RAT torpedo (rocket-launched) capable of 5000 yards, while the DASH drone helicopter (one of the first military drone in existence), could bring this to 15,000 yards.

FRAM II ships introduced a variable-depht sonar to track now deep-diving subs and inreased audio quality, and later appeared long-range Mk.37 ASW torpedoes. FRAM-I vessels were upgraded with the SQS-23 sonar (10,000 yds, reliable sphere), and in parallel was developed the familiar ASROC, capable of hitting a target at 20,000 yards. Signal and detection range could be of course further extended by the use of LAMPS-III Helicopters (Seahawk) onboard the larger 1970s frigates. The ships's size was also function of the size of the sonars. The SQS 4 could fit in ww2 ships, but the SQS-26 needed almost a cruiser-size ship and barely fit into the roomy Knox and Perry.

3 in guns/50

Details of the last Frigate to use the 3 in/50, USS Bronstein, closeup, with the ASROC behind. The Bronstein had a single mount aft.

The venerable 3 in/50 of of the USN was everywhere, from submarines to large and small warhips, as a main close defence weapon, dual purpose although this was only true in WW1 due to the weak speed and altitude of planes. The version that was used, the Mark 22, was developed in 1944. The barrel length was 150.3 inches (382 cm) bore (50 calibres). It fired the 24 lb (11 kg) armor-piercing, AA, VT Frag (Variable Timing Fragmentation), or Illumination 13 lb (5.9 kg). Rate of fire was 20 rounds on average, manual loading. Range was 14,600 yd (13,400 m) at 43° elevation with a 30,400 ft (9,300 m) AA ceiling.

In the 1960s, the Mark 22 evolved and adopted proximity fuze and fire-control radar. The Twin 3″/50 mount was able to fire 50 rounds per minute and per barrel, and the USN found it more effective than the WW2 classic quad Bofors 40 mm gun, but only against subsonic aircraft. Some of the FRAM destroyers kept these guns, and aicraft carriers were equipped with twin mounts AA Mk. 33 for most of the cold war. In fact the gun was officialy retired from the USN inventory in 1992.

3 in guns/70

USS Carpenter, DER conversion using the 3 in/70 twin gun

This dual-purpose gun specialized for AA defence was common durong the cold war. Called the 3"/70 Mark 26 gun it was designed to replace both AA systems, the standard-issue WW2 Oerlikon 20 mm cannon and Bofors 40 mm. They were alreadytoo small to kill-stop Japanese kamikaze, and after a long joint study with UK, the design was finalized in 1956. The Mark 26 was a clear improvement over the /50 Marks 33,34. The barrel was increased and range jumped by 5,000 feet (1,500 me) at 5°, and the ammunition would still receive a VT radar proximity fuze. The twin barrel mount became standard, and the sing mount never saw service. It was rated for 90-100 rpm, with a 3,400 fps (1,000 m/s) muzzle velocity and extreme range of 19,500 yards (17,830 m). This model was used on two DER conversions, five DL destroyers (Mitscher), and the command ship USS Northampton.

Weapon ALFA

Developed from the Mousetrap 375mm (14.8") Bofors, and designed to answer Soviet 250 mm and 300 mm systems, naval multiple rocket launchers, Weapon "Alfa" emerged in the end of World War II, to kill the Type XXI U-boat. Development ended in 1950 with a launcher for a rocket weighing 227 kg (500lb), but of standard 127mm (5") caliber. Each carried a 113 kg (250lb) warhead. It acted as a superfast depth charge, sinking at 12m/s (40ft/s). The revolving Mark 108 launcher had a range of 360-730m (400-800yd). The sonar allowed to gather data to set the time fuse. The launcher fired one rocket at a time, but could fast-reloading after the rocker was fired, with 22 ready ammunition behind. Therefore practical rate of fire was twelve a minute.

USN Hedgehog ASWRL

A hedgehog launcher on displayat USS Silversides museum, Muskegon -by Aaron headly- Creative Commons.

The classic WW2 hedgehog developed from british models in 1942-43 was still widely used. They presented tow main advantages: Maintaining the ASDIC contact (and later sonar) longer, having a greater reach both in distance and depth (in speed). They only exploded on contact, therefore athe absence of explosion panache meant a new attack was to be performed.
Compared to a standard depht charge sinking at 2.7-5m/s (8.9-16.5ft/s), the added velocity of the rocket allowed the TNT warhead to reach a crash-diving submarine. They were developed from Mark 10 and 11 models, themselves derived from the British Spigot mortar. Standard-issue in the 1950s and early 1960s these were called "Hedgehog projectors" and can fire 7.2 inches (18.3 cm), 65 lbs. (29.5 kg) projectiles, each carrying a 35 lbs. (15.9 kg) Torpex charge.

Their sinking speed was 22-23.5 fps, and they were fired either in an elliptical pattern 195 feet (59 m) by 168 feet (51 m) at 283 yards (259 m). The Mark 11 fired projectiles in a circular pattern 267 yards (244 m) wide, same range. 24 projectiles were thrown with 0.1-0.2 secs. between pairs and reloading time was 3 minutes. When fired they hit the water 17 sec. after, and up to 34 seconds to reach a 600 feet (183 m) of depth. The last model used by the USN was the Mark 15, mounted on a stabilized platform adapted from a quadruple 40 mm Bofor mount, and which could be fired remotely from the plotting room.

ASWRL "Mousetrap"

Other Marks appeared afterwards, abandoned, projected or in limited use, until the Mark 20 "mousetrap" system firing four projectiles at once, called the Mousetrap rocket projector with four rails. It used a lighter model than the usual 85 lbs. (39 kg) but was found difficult to handle. The whole system was lighter and smaller and therefore could replace the hedgehog on smaller ASW vessels and patrol crafts. The Mark 22 was an improved model, but it was eventually dropped while the British squid was evaluated. The weapon Alfa took its place and the RAT was also tested on the USS De Haven DD-727. For all purposes the RAT was a missile, not a rocket and an ancestor of ASROC.

ASW Grenades

Early depth-charges still in use were 1944-designed Mark 16 models, in service by 1946. They still used set proxmity fuses. Total Weight was 435 lbs. (197 kg), Explosive Charge 295 lbs. (134 kg) of Torpex, and sink rate/Terminal Velocity was about 31 fps (9.4 mps). Maximal setting was 2,500 feet (762 m). These models were thrown in standard racks (stern) or mortars/projectors (side) like for WW2 ships.


The characteristic RUR-5 "Matchbox" launcher of the 1960s.

Officially called RUR 5, Anti-Submarine ROCket, the famous acronym became the proverbial ASW weapon of choice during the cold war. It was not only used by the USN but a large variery of navies from major nations but France and UK. Although the concept was still inherited from the Hedgehog, rockets were replaced by missiles at the end of the program. It started with the RAT or Rocket Assisted Torpedo program by the Naval Ordnance Test Station at China Lake in the 1950s. The idea was to launch at great distances a torpedo delivered by parachute from the air, giving little notice to the attacked submarines, reached underwater in seconds.

The program ended with a derivative of the RAT-C, which became operational in 1960 on USN destroyer USS Norfolk. The system called for a distinctively orientable MK-112 "Matchbox" launcher, which lasted for 30 years and became a familiar feature of all USN ships of the Frigate size and above; It was replaced in 1990 by vertical launchers RUM-139/VLA. When the position was located, a rocket propelled an offensive payload which could be an acoustic homing torpedo or even a W44 Nuclear Depth Bomb. The Mark 46 torpedo carried a 96.8 pounds (43.9 kg) PBXN-103 HE oayload. The use of a parachute allowed entering water at low speed, with minimum detectable noise.

The W44 lacked precision but of course the blast was a 100% kill even at a distance. Depending on the model, torpedoes were self-guided using an active or passive sonar. The W44 was a 10 kt model, retired in 1989 of all ships when the Nuclear Test Ban Treaty was signed. The Soviet navy also made use of small nuclear depht charges, sometimes dropped by helicopters.



DASH, Gyrodine-QH-50 on DD-692 1967
The Gyrodyne QH-50 DASH (Drone Anti-Submarine Helicopter) was one of the first recorded naval drones. By eliminating the human factor, it was possible to design a much smaller craft, available to be used on smaller USN ships, such as frigates and patrol boats. It was not tasked of the same duties as regular helicopters, usually performing SAR missions much often than ASW hunting or communication relay for OTH missile guidance. The system was created to boost ASW capabilities of existing ships -new and converted- at a time the Soviet Navy was building submarines faster than the USN could build ASW frigates.

Tests began in the late 1950s already and the first operational model was introduced in 1962. The intermediate, and most current model Mark II was propelled by a pair of Porsche YO-95-6 engines and carried a single Mk 43 homing torpedo. It used a contrarotary drive to stay compact. The idea came from the attempted USMC scouting RON Rotorcycle. But in the end the DASH was considered expendable and used extensively cheap off-the-shelf industrial electronics with no back-ups and multi-channel analog FM. In action, the attrition rate was enormous, with 80% losses due to system failures and malfunctions. So much so that the whole program was scrapped in 1969, when the USN was focused on Vietnam and ASW was no longer a priority, at least officially.

ASW Torpedo Tubes

We will focus on the Mk.23 torpedo tube banks, the most common, new generation ASW torpedo tube banks in service, called in naval nomenclature Surface Vessel Torpedo Tubes (Mk 32 SVTT). It was in design, tailored to fire relatively small homing torpedoes, of the 12.75-inch (324 mm) caliber. These torpedoes were modernized in successive lines, the Mark 44, 46, 50 and 54. They were light enough to be manned by the crew without the intervention of a crane or pulleys. This universal standard used by other navies of NATO also allowed the use of Australian MU90 Impact models and British Sting Ray torpedoes.

The 2,230 pounds (1,010 kg) tubes are simple, using compressed air stored in a rear flask, weatherproof, made of fibreglass or fiberglass liner encased in metal ad can store the projectiles for long periods of time, requiring maintenance. One is stacked on top of the two others to gain space. Their compact size allowed them to be place on the ships broadside, alongside existing superstructures without much change. They could be fired manually as a backup but normally remotelly.

The standard was the Mark 44 ASW homing torpedo, the most common NATO model also used and built under licence by Canada, France, Italy, Japan and the United Kingdom. About 10,500 has been made for the U.S. Navy alone, with a production starting in 1957 and spanning until 1967. Designed by Naval Ordnance Test Station Pasadena (GE), it weighted 432 pounds (196 kg) for 8.2 feet (2.5 m) by 12.75 inches (32.4 cm). Projected at 400 ft/s its payload was a Mk 101 Mod 0, HBX-3 75 pounds (34 kg) torpex charge, explosing on contact. Operating depht was 1,000 yards (910 m), at a speed of 30 knots (56 km/h; 35 mph), thanks to a 30 hp (22 kW) eletric engine and operational range of 3.4 miles (5.5 km). The Helix was a vacuum tube-based guidance system with a range of settings, driving the active sonar. The torpedo searched a target until exhausting its 6-min endurance.

ASW Helicopters

Although a bit off-topic as this chapter is considerable and concened all USN Ships, we will focus there on the only models deployed on the ships large enough to host them: The Knox and Perry class frigates. Two Brooke class ships however has been modified to operate LAMPS-I types. At their introduction in the 1960s, the Knox class were fitted to operate only the unmanned DASH system. But they were refitted later to operate a LAMPS-I, and both sometimes could be swapped due to the generous space of the hangar. The Perry operated LAMPS-I/II models right from the start.

There has been three models of the ASW-specialized helicopters in USN service, called LAMPS (Light Airborne Multi-Purpose System). LAMPS-I/II were Kaman SH-2F Seasprite, LAMPS-III much larger Sikorsky SH-60B Seahawk. Frigates, having limited size, operated the Kaman.

SH-2F Seasprite
Born in July 1959 (first flight HU2K-1), introduced from 1962, only 184 were made until 1969. It was strickly a USN ship-based utility helicopter made by the small Kaman Aircraft Corporation. Outside the US it was also evaluated by the RCAN and used by the Royal New Zealand Air Force. Outside ASW warfare, it was also used as a Utility transport helicopter and for SAR missions, and very active during the Vietnam war. The last "official" version was the SH-2F propelled by two 1,350 shp (1,007 kW) General Electric T58-GE-8F turboshaft engines, although the company participated in another call to offers with a renewed version called the Kaman SH-2G Super Seasprite, a pure ASW model ftted with two 1,723 shp (1,285 kW) General Electric T700-GE-401 turboshaft engines. It was first tested in 1985, introduced in 1993, and adopted also by the Egyptian, RNZN and Polish Navy.

USN cold war sonars

The first and most common model developed for the USN was a passive hull sonar SQS-4. It was declined into four evolutions (mods), with about the same range of 4500-5000 yards, and a frequency ranging from 8 to 14 Khz. Pulse Lengths and Pulse Powers were 6 ms (50 kW), 30 ms (30 kW), 80 ms (10 kW). Soon after appeared the SQS-7 (12 kHz) with pulse Lengths of 3 ms (50 kW), 10 ms, 30 ms, 60 ms, a Beam width of 20° x 20°, range scales of 2500, 5000 and 10,000 yards, also tested in VDS version. The SQS-10 was used on the DDE conversions escort destroyers, with a frequency of 20 kHz, pulse Lengths & powers of 6 ms (50 kW), 30 ms (10 kW), 80 ms (3 kW), a beamwidth of 19°, scanning Rate of 150 cps and range scales of 1000, 3000 and 6000 yards.

The last model, installed from 1958 and assimilated to the adoption of ASROC, was SQS-23 nicknamed the "10,000 yards sonar". It worked with frequencies 4.5 kHZ, 5 kHZ, 5.5 kHZ, pulse Lengths of 5 microseconds, 30 microseconds, 120 microseconds, Beam width of 9.25 x 9.25 deg with vertical variations, coverage of 300 degrees (stern baffles limits), scanning Rate of 150 cps and range scales of 1,000, 2,500, 5,000, 10,000, 20,000 and 40,000 yards.

DER Converted Destroyer Escorts (1950-55)

DER 324 USS Falgout
DER-324 (USS Falgout) off Pearl Harbor 30 August 1963

When WW2 ended, not only the USN was found with hundred of regular destroyers, but also hundred of escort destroyers as well. However the latter were made with a single, well defined purpose in mind: Dealing with U-boats in the Atlantic. Whereas many contructions were cancelled in the summer of 1945, extisting ships, barely a few years old, were mothballed in endless NyD parks. However some were left uncompleted and completed in 1950 as DER 31 ships ('Destroyer Escort Radar') for several classes and three DEC of the Buckley (TE) class. In 1961 (The Berlin crisis), many were reactivated as there was a new submarine threat: Soviet submarines. The Whiskey class alone claimed about 250 boats, and they were much more capable than WW2 Type VII, they were closer to modernized versions of the Type XXI.

Radar picket ships conversions were indeed developed fromp what was learnt in the Pacific. The Navy still needed an early warning system and the stopgap measure chosen was to convert many of these numerous escorts. After experimenting with several BUCKLEY class DEs, swapping their armament for a powerful radar, the USN concluded they were not satisfactory. But the threat of Soviet nuclear missiles ended with an order for 34 DE types (Edsall class) and two JOHN C. BUTLER class. Their conversion looked like APDs with more radar equipment added, and they were thrown in patrol duties in the Atlantic and Pacific. They were under the authority and control of the Distant Early Warning (DEW) Line.

These Destroyer Escort Radar Picket ships (DERs) were like sea-borne air control stations, constantly on alert for any sign of Soviet missile launch. A typical DER spent a month at sea on average, in severe weather. The DEW Line was obsolete by the 1970s, replaced by satellites and DERs were sent to Vietnam where they could indeed track Viet Cong resupply planes.

FRAM-I/II Converted Destroyers (1960-65)

One of the solutions of the Congress backing down any attempt to built a massive fleet of brand new, fast ASW escorts was to recycle obsolescent WW2 destroyers, still available in large numbers and gradually mothballed by the late 1950s. The first of these programs, called FRAM-I (For "Fleet Rehabilitation And Modernization") was quite extensive and designed to prolongate the active life of the Gearing-class by at least ten years, into the 1970s, whereas in reality most of the infamous "FRAM cans" saw active service until 1982.

Part of the explanation was the late replacement of existing destroyers by the Spruance class because of the Vietnam war. The conversion was also applied to 12 Allen M. Sumner class DDs as well, and 12 Gearing-class with some variations, known as FRAM-II. The conversion was clearly a conversion to versatile escort ships made for a task force to specialized submarine hunters. This was required to answer the new perile of the growing Soviet submarine fleet.

The alarm bell was driven by Admiral Arleigh Burke in 1957, requiring attention from the Pentagon and Congress over the menace of already existing 300 modern submarines used by the Warsaw Pact. Aware of the same threat, the Royal Navy already launched a similar conversion in the 1950s of WW2 destroyers into twenty-three Type 15 first-rate anti-submarine frigates and ten Type 16 limited conversions. The plan did not included older models like the Benson and Fletchers which for the most part has been already modernized for transfer to various NATO countries.

FRAM-I (1960)

FRAM-I USS Charles H Roan

The conversion and overhaul of 78 of the Gearing-class destroyers (all but four remaining) to keep them active for the larger part of the cold war was a considerable undertaking, yest in theory cheaper than to built large series of replacement ASW vessels such as PC-boats. On existing ships alread converted to DDR and DDE, all equipments were scrapped and the ships underwent a variant of the modernization and were called DDs. The rebuilding was total and concerned all interio equipments, superstructure, electronic systems, radar, sonar, and weaponry, with the notable exception of the twin 5-in turrets which in some case were modernized, and one removed. All the WW-2 era AA artillery was removed in particular as well as the old torpedo tubes banks.

In detail, the sensors adopted were the SQS-23 sonar and SPS-10 surface radar. Armament-wise, the biggest leap forward was the adoption of ASROC, two triple banks of Mark 32 torpedo tubes, and DASH for extended ASW strike. The drone had its own landing pad build at the rear, with a small deckhouse. The ASROC took place where the former TT bank resided, and the two smaller Mk.32 TT banks took place each at the front, in place of the turret N°2.

FRAM-II (1962)

FRAM-II USS Ernest G Small

The FRAM-II program was a reboot of the conversion, targeting the older Sumner-class destroyers. However sixteen Gearing class ended upgraded to this standard as well. outside the usual life-extension refurbishment, a new radar system was installed, new electronics, and new armament, with Mark 32 ASW banks of torpedo tubes, DASH ASW drone, and variable depth sonar but not ASROC.

Six DDRs and six DDEs retained their original configuration in 1960–61 and four DDRs that were converted to DDs in 1962–63. All three 5-inch gun turrets were kept for all but the few ships converted as DDEs which swapped a turret for a trainable Hedgehog. FRAM IIs had two additional Hedgehogs alongside turrets or existing systems. The four converted DDRs had also now long-range 21-inch torpedo tubes, operating the Mark 37 ASW homing torpedo. The ex-DDRs had also two Mk.32 TTs installed alongside the small superstructure built behing the main bridge and funnel, where the ASROC was situated. A the stern, the VDS (Variabke Depth Sonar) was installed. For easier recoignition, the six other DDRs had no DASH landing spot markings and a smaller deckhouse so their use of DASH was limited, if any.

Miaoulis FRAM
One of the last FRAM II, an Allen M Sumner class further modernized after transfer to Greece, D211 Miaoulis (

USS Harwood (DD-861) after FRAM II conversion in the 1960s
USS Harwood (DD-861) after FRAM II conversion in the 1960s

Dealey class Ocean Escorts (1953)

USS Hammerberg 1957

These ships started as enlarged PC-boat or coastal patrol ASW ships, with better armament, range and detection systems. As the world was found in a cold war environment, the design was modified so the ships could be turned into very large mobilization series, and for example had a single propeller and proven, well-tested and cheap equipments and half the crew of a destroyer. In addition to two twin dual-purpose 3 in guns (76 mm), fore and aft the the ship, the forward one enclosed in a turret, they had a Weapon Alfa ASW system of rocker launcher, while the USS Dealey, first of the serie, possessed a British squid system.

Their electronic gear consisted of a SPS-6 radar and SQS-4 Sonar. Although their geared turbine coupled to two boilers gave them 20,000 hp, enough for achieving 27 knots and a 6000 nautical miles range, they were criticized to be under-armed. Nevertheless, 13 ships were built, which gave all satisfaction to the USN and the design was also exported to Portugal, and Norway. In 1963 through the FY62 program, three ships (Dealey, Courtney, Cromwell) were given the SQS-23 sonar, DASH spot and hangar, while the remainder received a SQS-4 sonar, and variable depth sonar model and in the late 1960s, Mark 32 triple ASW torpedo banks. They were decommissionned in 1972-73.

USS dealey May 1954

Dealey class blueprint rendition. src: Unknown

Dealey class Characteristics:

Displacement: 1314t standard, 1877t PC
Dimensions: 93.9 pp/96 oa x 11.2 x 3.6m
Propulsion: 1 shaft geared Westinghouse turbine, 2 Foster Wheeler boilers, 20,000 hp. and 27 knots. RA 6000 Nm/12 knots.
Crew: 173
Sensors: SPS-6 40 Radar, SQS 4 sonar.
Weaponry: 4 x 3 in (76 mm), Weapon Alfa (ASWRL), 2x 3 TTs, 2 DCTs.

Claud Jones class Ocean Escorts (1958)

USS McMorris Oahu 1972
USS McMorris off Oahu in March 1972, two years before being sold. The class was one of the worst ASW ships ever fielded by the USN

The Dealey were considered costly ASW vessels, moreover if compared to the original PC-boats they were supposed to replace. The USN admiralty launched in 1955 already a study for their complement by a cheaper version. As a result, the final ship, which designed was approved in 1957 and first laid down at Avondale in June 1957, was "minimal" in her approach, with just two dual purpose guns and instead of Weapon alfa, two more classic hedgehogs, derived from WW2 models. Their hull was slighly wider and deeper, but a tad shorter also.

In addition two lightweight ASW torpedo tubes were installed, on each side.
There was also a drastic reduction of power, with only 8700 hp produced, enough however for 21 knots. However range was better, 7000 bautical miles covered instead of 6000. The sensors, radar and sonar, were the same. The crew was not significantly reduced. But the end result, in service by 1959, was hatred by crews and officers alike.

There was a backlash in reports inside the admiralty and a new study was launched quickly to create better ships overall, which ended with a leap forward, the Bronstein. In 1961, freshly introduced, USS Charles Berry and McMorris (DE1035-1036) received a Norwegian-designed Terne III Rocket-Launched Depht charge system and even lighter torpedo tubes. Their ASW service was cut short, as they were consirered unsuited for the job, and instead they were converted as electronic reconnaissance ships for the Pacific fleet. In 1974 all four were resold to the Indonesian Navy as Mongidisiri (Claud Jones), Samadikun (John R Perry), Martadinata (Berry), Ngurah Rai (McMorris).

Claud Jones class blueprint rendition. src: Unknown

Claud Jones class Characteristics:

Displacement: 1314t standard, 1916t PC
Dimensions: 91.8 pp/95.1 oa x 11.6 x 3.9m
Propulsion: 2 shaft diesels, 8,700 hp. and 21.5 knots. RA 7000 Nm/12 knots.
Crew: 171
Sensors: SPS-6 Radar, SQS 4 sonar.
Weaponry: 2 x 3 in/50 (76 mm), 2 Hedgehog ASWRL, 2x3 ASW TTs, 1 DCT.

Bronstein class Ocean Escorts (1962)

Bronstein 2 views

The Bronstein class was designed in reaction to the vivid criticism met by the previous Claud Jones, and were a kind of return to the Dealey approach but with a new SQS 26 Sonar, ASROC and DASH systems which were also brand new. They only kept one of the original 3-in DP twin mounts, the other turret being a single mount. This strange arrangement was also meant to gain in ASW capabilities. There was a loss of speed though, despite a power back to 20,000 hp, at 26 knots (one knot less). Range also was the worst yet at 4000 nm at 15 knots.

As a result, the Bronstein were slower than the ASW task frce in which she was supposed to operate, whereas the limited range was a problem too. Compared the the first Soviet SSNs capable of 30 knots, the ships were not up to the task despite presenting a hull shape, superstructure, armament and electronics up to the task. Only two ships were built as a result, almost an experiment. They were the USS Brontein (DE 1037) and USS McCloy (DE 1038) built at Avondale, laid down in 1961, launched march and june 1962 and completed june and october 1963.

In the 1970s, their aft 3 in gun was removed and a variable depht sonar installed instead. A towed array surveillance sonar was also fitted on both ships at that time, and Bronstein inaugurated the SQS 15 towed array sonar ASW system. Both were often sidelined in operations due to their poor performances but saw the cold war up to the end, being stricken in December 1990.

Profile from blueprints of the Bronstein (Conways)

Bronstein class Characteristics:

Displacement: 1882t standard, 2732t PC
Dimensions: 106.7 pp/113.4 oa x 12.5 x 7.0m
Propulsion: 1 shaft De Laval geared turbine, 2 Foster Wheeler boilers, 20,000 hp. and 26 knots. RA 4000 Nm/15 knots.
Crew: 191
Sensors: SPS-40 Radar, SQS 26 sonar.
Weaponry: 1x2 + 1 in/50 (76 mm), ASROC, DASH, 2x 21 in TTs, 2x3 Mk 32 ASW TTs, 1 DCT.

Garcia class Ocean Escorts (1963)

USS Albert David 1965
USS Albert David in 1965
Ships: Garcia, Bradley, Ed. Mc Donnell, Brumby, Davidson, Voge, Sample, Koelsch, Albert David, O'Callahan, and Glover (AGDE-1).

With the new generation of Soviet submarines, started with the November class SSN, there was an urge to design faster escorts. The idea of the admiralty was therefore to keep the fundamentals of the previous semi-experimental Bronsteins in terms of armaments and sensors, while giving them a much more powerful set of turbines, able to reach 35,000 hp, for a speed up to 27 knots (at first 30 knots was hoped for). This traduced by a clear cut rise in tonnage. For the same speed, the Garcia were twice the tonnage of the latter.

This time the admiralty took the time to polish the design. First studies emerged in 1959, even before the construction of the Bronsteins, but the first ship, USS Garcia (DE 1040) was not laid down before October 1962, a year and 7 month after. The 17 ships that commprised this class were laid down between 1963 and 1964, launched 1964-66 (Talbot, Page, Furer) and completed in 1964-68 at the Bethlehem (San Francisco), Avondale, Defoe (Bay City), Lockheed (Seattle), and Bath Iron Works shipyards.

Garcia class, USS Voge in 1967. (Conways)

The USS Voge introduced a sloping bulkhead and the new Knox-class ASROC reload magazine. From 1972, all but DE 1048 USS Sample and DE 1050 USS Albert David received a landing pad for a LAMPS Helicopter. Already they received extensive facilities for their DASH drone system. Originally they were fitted with long range torpedoes launched by the stern for Mk24/25 models. This was removed when the program ended, to the benefit of DASH and LAMPS.

Brooke class ships were decommissioned in 1988, some sold to Brazil (Bradley as Pernambuco), Davidson (Paraiba), Sample (Parana), and Albert David (Para), and the others apparently leased to Pakistan, Garcia (Saif), Brumby (Harbah), O'Callahan (Alsat), and Koelsche (Siqqat). The only two not transferred, USS Mc Donnell and Voge, tested variable depht sonars and were stricken in 1992.

About AGDE-1 USS Glover (1965)

USS Glover
USS Glover profile in 1968 (Conways)

USS Glover
USS Glover had a pumpjet propulsion, raised platform on the rear deck aft, no after 5 in gun, or missile launcher. In 1979 she was redesignated FF 1098, MSC in 1990, deactivated and stricken in 1992.

Garcia class Characteristics 1964:

Displacement: 1882t standard, 2732t PC
Dimensions: 106.7 pp/113.4 oa x 12.5 x 7.0m
Propulsion: 1 shaft Westinghouse geared turbine, 2 Foster Wheeler PF boilers, 35,000 hp. and 27 knots. RA 4000 Nm/20 knots.
Crew: 208
Sensors: SPS-40 Radar, SQS 26 sonar.
Weaponry: 1x2 + 1 in/50 (76 mm), ASROC, DASH, 2x 21 in TTs, 2x3 Mk 32 ASW TTs, 1 DCT.

Brooke class Ocean Escorts (1965)

USS Schofield
USS Schofield in the 1960s
6 frigates, Numbered DEG-1 to 6 (Brooke, Ramsey, Schofield, Talbot, Richard L Page, Juluis A Furer)

The Brooke class is in reality closer to a sub-class for the Garcia than a true independent class, since both shared most of their components, hull, and engines. But sensors and armaments wise, both ships diverged, to the point the Brooke were denominated FFG and not FF like the Garcia class from 1975. These were indeed missile versions, whereas the others were ASW versions. The Brooke class had a single 5 in/38 gun, and a Tartar SAM missile, with 16 reloads. The 21-in ASW TTs were removed, and instead of the SPS-40 radar, the Brooke had the SPS-39 and SPG-51 fire control system for the Tartar launcher. They still retained their ASROC as a main ASW weapon system.

All but two ships (Ramsey and Schofield) were apparently leased to Pakistan after decommission in 1988 as Khaibar (Brooke), Hunam (Talbot), Tabuk (Page) and Badr (Richard L Page). There are some confusion as Conway's source speaks of a decommission in 1988 while the leasing transfer was dated from 1986. All these Frigates were returned to US in 1993–95 when the renewing of lease with an option of purchase was denied by the United States. Today Pakistan operates a single ex-USN Frigate, PNS Alamgir (F-260), of the Perry class. The returned Frigates were replaced by four Ex Royal Navy Type 21 frigates (Tariq class) and joint-constructed Zulfiquar-class with China.

USS Brooke
USS Brooke profile in 1969 (Conways)

Brooke class Characteristics 1964:

Displacement: 1882t standard, 2732t PC
Dimensions: 106.7 pp/113.4 oa x 12.5 x 7.0m
Propulsion: 1 shaft Westinghouse geared turbine, 2 Foster Wheeler PF boilers, 35,000 hp. and 27 knots. RA 4000 Nm/20 knots.
Crew: 228
Sensors: SPS-39 Radar, SPG-51 FCS, SQS 26 sonar.
Weaponry: 1 x 1 in/50 (76 mm), Tartar SAM, ASROC, DASH, 2x3 Mk 32 ASW TTs.

Knox class Ocean Escort (1966)

US Robert E Peary
USS Robert E Peary (FF-1073) off San Francisco

The Knox Class Frigates (named after the Secretary of State for the Treasury (1888-1956)) followed those of the Garcia/Brooke Class of 1962. The first, DE-1052, was started in October 1965 and in service in April 1969. They represented a new generation of ocean escorts (escort destroyer) with the emphasis on ASW defense, while being studied to be more economical and more enduring at the same time. The hull was thus lengthened to receive a more conventional engine installation than high-pressure turbines that were no longer favored by the admiralty, and to receive a larger tank space. They were criticised for their limited armament (only a single 127 mm gun, but a modern automated 54 calibres QF, long range) and unique propeller.

Interior roomy fittings and reduced crew gave them a good flexibility and adaptability and a better livability, even comfort. It was planned to install equipment for an AA missile ramp, which was finally abandoned, and tests were carried out with ASW DASH drones. In the end, an eight-foot sea sparrow launcher was fitted behind the runway aft. The bow was enhanced by an important bulwark. Their name DE (destroyer escort) persisted until 1975, officially replaced by FF (Frigate). From the 1970s, Avondale yards, already specialized, was solely responsible for the production of Knox, which totalled 46 units, the last, USS Moinester (DE-1097) being completed in 1974. That was the mass-produced model the admiralty called for since the 1950s.

USS Bowen FF-1079
USS Bowen FF-1079

In 1990, the end of the cold war meant retirement for ships between 20 and 30 years old. It was planned to keep eight for the training of naval reservists, but they were eventually put in reserve and deactivated, like the rest of the units in 1991-94. A total of 23 units were transferred to friendly navies, Greece and Turkey in 1992, then Egypt, Taiwan, Thailand. Other countries such as Spain, Morocco or Brazil and Venezuela refused, because of the sad state of their propulsion. A handful of these buildings are still in use today.

USS Knox - Author's illustration


Displacement: 3020t standard, 4066t FL
Dimensions: 133.5 x 14.3 x 7.6m
Propulsion: 1 propeller, 1 Westinghouse turbine, 2 boilers, 35,000 hp and 27 knots. RA 4500 MN.
Crew: 224
Sensors: 1 SPS 40 Radar, SQS 26 and SQS 35 sonar.
Weaponry: 1 x 127 mm DP, 1 x 8 sea Sparrow, 1 x 8 ASROC ASW (16 m), 2 x 2 ASW 324 mm TTs (22), 1 LAMPS I helicopter.

Oliver Hazard Perry class Ocean Escort (1976)

Ten years after the launch of the USS Knox, the US Navy launched the O.H. Perry class. Criticisms concerning the Knox were the same for the Perry, who descended in line, with the same specifications. This time, however, the AA gun had given way to a versatile SAM / harpoon mid-range launcher, the only gun being an ultra-fast, anti-missile capable 76 mm model installed on the superstructure, and later supplemented by a Vulcan-Phalanx CIWS model.

Although the hull was slightly longer than the Knox, the hydrodynamic qualities were reworked and the tonnage was lower with a clear draft, a higher speed and increased autonomy. The superstructures were also enlarged considerably, as was the case with the Spruance, giving them more modularity for future upgrades. The hangar also benefited from this extension and could accommodate two heavier LAMPS III seawahk helicopters or a even a Sea King. Gas turbines had been improved to achieve these objectives and the mack had disappeared, the funneks being relocated on the rear superstructure and shortened, while sensors and radars were setup on two derricks masts, clear from obstruction.

USS Stark
In the Persian Gulf, a port quarter view of the guided missile frigate USS STARK (FFG-31) listing to port after being hit by two Iraqi Exocet missiles within 30 seconds. 37 sailors are killed.

One of the advantages of these ships was the redundancy of their systems, allowing, for example, to compensate for the decommissioning of the main thrusters by a pair of 325cv side thrusters, the short-range bow sonar supplemented by the towed sonar at the stern and two helicopters LAMPS. Admiral Zumwalt was the main proponent of these ships, designing them as smaller, less expensive versions of the Spruance class DDs.

Indeed their front box launcher, buried into the hull had the ability to send a Harpoon for real antiship capabilities, in addition to SAMs also carried in the same modular unit. The loss of the ASMC ASW launcher was largely compensated by the presence of two ASW helicopters. The first ship was in service in November 1979, the last one in August 1989. They were omnipresent during the Gulf War, several being equipped with two AA bushmaster guns and their tonnage had increased significantly with the addition of protective armor of Kevlar alloys. The USS Starck took two exocet missiles in 1987 during the Iran-Irak war and survived, while samuel B roberts hit a mine at the stern and also survived. Several ships were built on modified plans for Australia, Taiwan and Spain. Several transfers were planned in 1994, canceled by Admiral Boorda in 1995: Fleet Presence Requirements froze offers made to Turkey.

OH Perry
Author's rendition of the O.H. Perry


Displacement: 2650t standard, 3490t FL
Dimensions: 135.7 x 14.5 x 4.4 m
Propulsion: 1 propeller, 2 gas turbines 2500 GE, 40,000 hp. and 28.5 knots. RA 4500 MN.
Crew: 176
Sensors: 1 SPS 49 radar, 1 CT Mk.92, SQS 56 sonar.
Armament: 1 x 76 mm DP, 1 standard SAM/Harpoon launcher (40 vectors), 2 x 3 ASW 324 mm TTs (24), 2 helicopters LAMPS III.

A future without Frigates ?

Since the OH Perry ships has been decommissionned from the 1990s to the 2000s (2014 for the last), the US Navy is without any frigate in service since 1943, USS Constitution being a relic. The LCS (Littoral Combat Ships) were equally modular and fast, but they are few in number as production stopped in 2019 after the 20th unit. With Pdt. Trump's current objective of 355 ships, there are discussions about reactivating some OH Perry, abs also a replacement program.

Many competitor's designs are studied by the admiralty commission. It's likely the future USN Frigates will be fast, stealthy, highly modular with heavy automation for a reduced crew and updated AEGIS capabilities. The FFG(X) is set for 2020, a short time which left only the possibility of adapting an existing "parent" design. But that's a story for another article.

Read More/Src 7-inch - WAMUS ASW - SQS_Series
Fleet_Rehabilitation_and_Modernization history modifications cold war escorts archives navys future frigates: more lethal and capable as well as cheaper
web.archive.or - bronstein class

Naval History

⚑ 1870 Fleets
Spanish Navy 1870 Armada Espanola Austro-Hungarian Navy 1870 K.u.K. Kriegsmarine
Danish Navy 1870 Dansk Marine
Hellenic Navy 1870 Nautoko Hellenon
Haitian Navy 1914Haiti Koninklije Marine 1870 Koninklije Marine
Dutch Screw Frigates & corvettes
De Ruyter Bd Ironclad (1863)
Prins H. der Neth. Turret ship (1866)
Buffel class turret rams (1868)
Skorpioen class turret rams (1868)
Heiligerlee class Monitors (1868)
Bloedhond class Monitors (1869)
Adder class Monitors (1870)
A.H.Van Nassau Frigate (1861)
A.Paulowna Frigate (1867)
Djambi class corvettes (1860)
Amstel class Gunboats (1860)

Marine Française 1870 Marine Nationale
Screw 3-deckers (1850-58)
Screw 2-deckers (1852-59)
Screw Frigates (1849-59)
Screw Corvettes (1846-59)
Screw Fl. Batteries (1855)
Paddle Frigates
Paddle Corvettes
screw sloops
screw gunboats
Sailing ships of the line
Sailing frigates
Sailing corvettes
Sailing bricks

Gloire class Bd. Ironclads (1859)
Couronne Bd. Ironclad (1861)
Magenta class Bd. Ironclads (1861)
Palestro class Flt. Batteries (1862)
Arrogante class Flt. Batteries (1864)
Provence class Bd. Ironclads (1864) Embuscade class Flt. Batteries (1865)
Taureau arm. ram (1865)
Belliqueuse Bd. Ironclad (1865)
Alma Cent. Bat. Ironclads (1867)
Ocean class CT Battery ship (1868)
French converted sailing frigates (1860)
Cosmao class cruisers (1861)
Talisman cruisers (1862)
Resolue cruisers (1863)
Venus class cruisers (1864)
Decres cruiser (1866)
Desaix cruiser (1866)
Limier class cruisers (1867)
Linois cruiser (1867)
Chateaurenault cruiser (1868)
Infernet class Cruisers (1869)
Bourayne class Cruisers (1869)
Cruiser Hirondelle (1869)

Curieux class sloops (1860)
Adonis class sloops (1863)
Guichen class sloops (1865)
Sloop Renard (1866)
Bruix class sloops (1867)
Pique class gunboats (1862)
Hache class gunboats (1862)
Arbalete class gunboats (1866)
Etendard class gunboats (1868)
Revolver class gunboats (1869)

Marinha do Brasil 1870 Marinha do Brasil
Barrozo class (1864)
Brasil (1864)
Tamandare (1865)
Lima Barros (1865)
Rio de Janeiro (1865)
Silvado (1866)
Mariz E Barros class (1866)
Carbal class (1866)

Turkish Ottoman navy 1870 Osmanlı Donanması
Osmanieh class Bd.Ironclads (1864) Assari Tewfik (1868) Assari Shevket class Ct. Ironclads (1868)
Lufti Djelil class CDS (1868)
Avni Illah class cas.ironclads (1869)
Fethi Bulend class cas.ironclads (1870)
Barbette ironclad Idjalleh (1870)
Messudieh class Ct.Bat.ships (1874)
Hamidieh Ct.Bat.Ironclads (1885)
Abdul Kadir Batleships (project)

Ertrogul Frigate (1863)
Selimieh (1865)
Rehberi Tewkik (1875)
Mehmet Selim (1876)
Sloops & despatch vessels

Marina do Peru Marina Do Peru
Monitor Atahualpa (1865)
CT. Bat Independencia (1865)
Turret ship Huascar (1865)
Frigate Apurimac (1855)
Corvette America (1865)
Corvette Union (1865)

Regia Marina 1870 Regia Marina 1870 Imperial Japanese navy 1870 Nihhon Kaigun Prussian Navy 1870 Preußische Marine Russian mperial Navy 1870 Russkiy Flot Swedish Navy 1870 Svenska marinen
Norwegian Navy 1870 Søværnet
⚑ 1898 Fleets
Argentinian Navy 1898 Armada de Argentina
Parana class Gunboats (1873)
La Plata class Coast Battleships (1875)
Pilcomayo class Gunboats (1875)
Ferre class Gunboats (1880)

Austro-Hungarian Navy 1898 K.u.K. Kriegsmarine

Chinese Imperial Navy 1898 Imperial Chinese Navy
Danish Navy 1898 Dansk Marine

Hellenic Navy 1898 Nautiko Hellenon
Haitian Navy 1914Marine Haitienne
Koninklije Marine 1898 Koninklije Marine
Konigin der Netherland (1874)
Draak, monitor (1877)
Matador, monitor (1878)
R. Claeszen, monitor (1891)
Evertsen class CDS (1894)
Atjeh class cruisers (1876)
Cruiser Sumatra (1890)
Cruiser K.W. Der. Neth (1892)
Banda class Gunboats (1872)
Pontania class Gunboats (1873)
Gunboat Aruba (1873)
Hydra Gunboat class (1873)
Batavia class Gunboats (1877)
Wodan Gunboat class (1877)
Ceram class Gunboats (1887)
Combok class Gunboats (1891)
Borneo Gunboat (1892)
Nias class Gunboats (1895)
Koetei class Gunboats (1898)
Dutch sloops (1864-85)

Marine Française 1898 Marine Nationale
Friedland CT Battery ship (1873)
Richelieu CT Battery ship (1873)
Colbert class CT Battery ships (1875)
Redoutable CT Battery ship (1876)
Courbet class CT Battery ships (1879)
Amiral Duperre barbette ship (1879)
Terrible class barbette ships (1883)
Amiral Baudin class barbette ships (1883)
Barbette ship Hoche (1886)
Marceau class barbette ships (1888)
Cerbere class arm. rams (1870)
Tonnerre class Br. Monitors (1875)
Tempete class Br. Monitors (1876)
Tonnant Barbette ship (1880)
Furieux Barbette ship (1883)
Fusee class Arm. Gunboats (1885)
Acheron class Arm. Gunboats (1885)
Jemmapes class C.Defense ships (1890)

La Galissonière Cent. Bat. Ironclads (1872)
Bayard class barbette ships (1879)
Vauban class barbette ships (1882)
Prot. Cruiser Sfax (1884)
Prot. Cruiser Tage (1886)
Prot. Cruiser Amiral Cécille (1888)
Prot. Cruiser Davout (1889)
Forbin class Cruisers (1888)
Troude class Cruisers (1888)
Alger class Cruisers (1891)
Friant class Cruisers (1893)
Prot. Cruiser Suchet (1893)
Descartes class Cruisers (1893)
Linois class Cruisers (1896)
D'Assas class Cruisers (1896)
Catinat class Cruisers (1896)

R. de Genouilly class Cruisers (1876)
Cruiser Duquesne (1876)
Cruiser Tourville (1876)
Cruiser Duguay-Trouin (1877)
Laperouse class Cruisers (1877)
Villars class Cruisers (1879)
Cruiser Iphigenie (1881)
Cruiser Naiade (1881)
Cruiser Arethuse (1882)
Cruiser Dubourdieu (1884)
Cruiser Milan (1884)

Parseval class sloops (1876)
Bisson class sloops (1874)
Epee class gunboats (1873)
Crocodile class gunboats (1874)
Tromblon class gunboats (1875)
Condor class Torpedo Cruisers (1885)
G. Charmes class gunboats (1886)
Inconstant class sloops (1887)
Bombe class Torpedo Cruisers (1887)
Wattignies class Torpedo Cruisers (1891)
Levrier class Torpedo Cruisers (1891)

Marinha do Brasil 1898 Marinha do Brasil
Siete de Setembro class (1874)
Riachuleo class (1883)
Aquidaban class (1885)

Marina de Mexico 1898 Mexico
GB Indipendencia (1874)
GB Democrata (1875)

Turkish Ottoman navy 1898 Osmanlı Donanması
Cruiser Heibtnuma (1890)
Cruiser Lufti Humayun (1892)
Cruiser Hadevendighar (1892)
Shadieh class cruisers (1893)
Turkish TBs (1885-94)

Regia Marina 1898 Regia Marina Pr. Amadeo class (1871)
Caio Duilio class (1879)
Italia class (1885)
Ruggero di Lauria class (1884)
Carracciolo (1869)
Vettor Pisani (1869)
Cristoforo Colombo (1875)
Flavio Goia (1881)
Amerigo Vespucci (1882)
C. Colombo (ii) (1892)
Pietro Micca (1876)
Tripoli (1886)
Goito class (1887)
Folgore class (1887)
Partenope class (1889)
Giovanni Bausan (1883)
Etna class (1885)
Dogali (1885)
Piemonte (1888)
Staffeta (1876)
Rapido (1876)
Barbarigo class (1879)
Messagero (1885)
Archimede class (1887)
Guardiano class GB (1874)
Scilla class GB (1874)
Provana class GB (1884)
Curtatone class GB (1887)
Castore class GB (1888)

Imperial Japanese navy 1898 Nihhon Kaigun German Navy 1898 Kaiserliches Marine
Russian Imperial Navy 1898 Russkiy Flot
Marina do Peru Marina Do Peru

Swedish Navy 1898 Svenska Marinen Norwegian Navy 1898 Søværnet
Royal Navy 1898 Royal Navy
HMS Hotspur (1870)
HMS Glatton (1871)
Devastation classs (1871)
Cyclops class (1871)
HMS Rupert (1874)
Neptune class (1874)
HMS Dreadnought (1875)
HMS Inflexible (1876)
Agamemnon class (1879)
Conqueror class (1881)
Colossus class (1882)
Admiral class (1882)
Trafalgar class (1887)
Victoria class (1890)
Royal Sovereign class (1891)
Centurion class (1892)
HMS Renown (1895)

HMS Shannon (1875)
Nelson class (1876)
Iris class (1877)
Leander class (1882)
Imperieuse class (1883)
Mersey class (1885)
Surprise class (1885)
Scout class (1885)
Archer class (1885)
Orlando class (1886)
Medea class (1888)
Barracouta class (1889)
Barham class (1889)
Pearl class (1889)

Spanish Navy 1898 Armada 1898
Ironclad Pelayo (1887)

Infanta Maria Teresa class (1890)
Emperador Carlos V (1895)
Cristobal Colon (1897)
Princesa de Asturias (1896)
Aragon class (1879)
Velasco class (1881)
Isla de Luzon (1886)
Alfonso XII class (1887)
Reina Regentes class (1887)

Destructor class (1886)
Temerario class (1891)
TGunboat Filipinas (1892)
De Molina class (1896)
Furor class (1896)
Audaz class (1897)
Spanish TBs (1878-87)
Fernando class gunboats (1875)
Concha class gunboats (1883)

US Navy 1898 1898 US Navy
USS Maine (1889)
USS Texas (1892)
Indiana class (1893)
USS Iowa (1896)

Amphitrite class (1876)
USS Puritan (1882)
USS Monterey (1891)

Atlanta class (1884)
USS Chicago (1885)
USS Charleston (1888)
USS Baltimore (1888)
USS Philadelphia (1889)
USS San Francisco (1889)
USS Newark (1890)
USS New York (1891)
USS Olympia (1892)
Cincinatti class (1892)
Montgomery class (1893)
Columbia class (1893)
USS Brooklyn (1895)

USS Vesuvius (1888)
USS Katahdin (1893)
USN Torpedo Boats (1886-1901)
GB USS Dolphin (1884)
Yorktown class GB (1888)
GB USS Petrel (1888)
GB USS Bancroft (1892)
Machias class GB (1891)
GB USS Nashville (1895)
Wilmington class GB (1895)
Annapolis class GB (1896)
Wheeling class GB (1897)
Small gunboats (1886-95)
St Louis class AMC (1894)
Harvard class AMC (1888)
USN Armoured Merchant Cruisers
USN Armed Yachts


☉ Entente Fleets

British ww1 Royal Navy
WW1 British Battleships
Majestic class (1894)
Canopus class (1897)
Formidable class (1898)
London class (1899)
Duncan class (1901)
King Edward VII class (1903)
Swiftsure class (1903)
Lord Nelson class (1906)
HMS Dreadnought (1906)
Bellorophon class (1907)
St Vincent class (1908)
HMS Neptune (1909)
Colossus class (1910)
Orion class (1911)
King George V class (1911)
Iron Duke class (1912)
Queen Elizabeth class (1913)
HMS Canada (1913)
HMS Agincourt (1913)
HMS Erin (1915)
Revenge class (1915)
B3 class (1918)

WW1 British Battlecruisers
Invincible class (1907)
Indefatigable class (1909)
Lion class (1910)
HMS Tiger (1913)
Renown class (1916)
Courageous class (1916)
G3 class (1918)

ww1 British cruisers
Blake class (1889)
Edgar class (1890)
Powerful class (1895)
Diadem class (1896)
Cressy class (1900)
Drake class (1901)
Monmouth class (1901)
Devonshire class (1903)
Duke of Edinburgh class (1904)
Warrior class (1905)
Minotaur class (1906)
Hawkins class (1917)

Apollo class (1890)
Astraea class (1893)
Eclipse class (1894)
Arrogant class (1896)
Pelorus class (1896)
Highflyer class (1898)
Gem class (1903)
Adventure class (1904)
Forward class (1904)
Pathfinder class (1904)
Sentinel class (1904)
Boadicea class (1908)
Blonde class (1910)
Active class (1911)
'Town' class (1909-1913)
Arethusa class (1913)
'C' class series (1914-1922)
'D' class (1918)
'E' class (1918)

WW1 British Seaplane Carriers
HMS Ark Royal (1914)
HMS Campania (1893)
HMS Argus (1917)
HMS Furious (1917)
HMS Vindictive (1918)
HMS Hermes (1919)

WW1 British Destroyers
River class (1903)
Cricket class (1906)
Tribal class (1907)
HMS Swift (1907)
Beagle class (1909)
Acorn class (1910)
Acheron class (1911)
Acasta class (1912)
Laforey class (1913)
M/repeat M class (1914)
Faulknor class FL (1914)
T class (1915)
Parker class FL (1916)
R/mod R class (1916)
V class (1917)
V class FL (1917)
Shakespeare class FL (1917)
Scott class FL (1917)
W/mod W class (1917)
S class (1918)

WW1 British Torpedo Boats
125ft series (1885)
140ft series (1892)
160ft series (1901)
27-knotters (1894)
30-knotters (1896)
33-knotters (1896)

WW1 British Submarines
Nordenfelt Submarines (1885)
Flower class sloops
British Gunboats of WWI
British P-Boats (1915)
Kil class (1917)
British ww1 Minesweepers
Z-Whaler class patrol crafts
British ww1 CMB
British ww1 Auxiliaries

✠ Central Empires

⚑ Neutral Countries

Bulgarian Navy Bulgaria
Danish Navy 1914 Denmark
Greek Royal Navy Greece

Dutch Empire Navy 1914 Netherlands
Norwegian Navy 1914 Norway

Portuguese navy 1914 Portugal

Romanian Navy 1914 Romania
Spanish Armada Spain Swedish Navy 1914 Sweden


✪ Allied ww2 Fleets

US ww2 US Navy
WW2 American Battleships
Wyoming class (1911)
New York class (1912)
Nevada class (1914)
Pennsylvania class (1915)
New Mexico class (1917)
Tennessee Class (1919)
Colorado class (1921)
North Carolina class (1940)
South Dakota class (1941)
Iowa class (1942)
Montana class (cancelled)

WW2 American Cruisers
Omaha class cruisers (1920)
Northampton class heavy cruisers (1929)
Pensacola class heavy Cruisers (1928)
Portland class heavy cruisers (1931)
New Orleans class cruisers (1933)
Brooklyn class cruisers (1936)
USS Wichita (1937)
Atlanta class light cruisers (1941)
Cleveland class light Cruisers (1942)
Baltimore class heavy cruisers (1942)
Alaska class heavy cruisers (1944)

WW2 USN Aircraft Carriers
USS Langley (1920)
Lexington class CVs (1927)
USS Ranger (CV-4)
USS Wasp (CV-7)
Yorktown class aircraft carriers (1936)
Long Island class (1940)
Independence class CVs (1942)
Essex class CVs (1942)
Bogue class CVEs (1942)
Sangamon class CVEs (1942)
Casablanca class CVEs (1943)
Commencement Bay class CVEs (1944)
Midway class CVs (1945)
Saipan class CVs (1945)

WW2 American destroyers
Wickes class (1918)
Clemson class (1920)
Farragut class (1934)
Porter class (1935)
Mahan class (1935)
Gridley class (1936)
Bagley class (1936)
Somers class (1937)
Benham class (1938)
Sims class (1938)
Benson class (1939)
Fletcher class (1942)
Sumner class (1943)
Gearing class (1945)

GMT Evarts class (1942)
TE Buckley class (1943)
TEV/WGT Rudderow classs (1943)
DET/FMR Cannon class
Asheville/Tacoma class

WW2 American Submarines
Barracuda class
USS Argonaut
Narwhal class
USS Dolphin
Cachalot class
Porpoise class
Shark class
Perch class
Salmon class
Sargo class
Tambor class
Mackerel class
Gato Class

USS Terror (1941)
Raven class Mnsp (1940)
Admirable class Mnsp (1942)
Eagle class sub chasers (1918)
PC class sub chasers
SC class sub chasers
PCS class sub chasers
YMS class Mot. Mnsp
ww2 US gunboats
ww2 US seaplane tenders
USS Curtiss ST (1940)
Currituck class ST
Tangier class ST
Barnegat class ST

US Coat Guardships
Lake class
Northland class
Treasury class
Owasco class
Wind class
Algonquin class
Thetis class
Active class

US Amphibious ships & crafts
US Amphibious Operations
Doyen class AT
Harris class AT
Dickman class AT
Bayfield class AT
Windsor class AT
Ormsby class AT
Funston class AT
Sumter class AT
Haskell class AT
Andromeda class AT
Gilliam class AT
APD-1 class LT
APD-37 class LT
LSV class LS
LSD class LS
Landing Ship Tank
LSM class LS
LSM(R) class SS
LCV class LC
LCVP class LC
LCM(3) class LC
LCP(L) class LC
LCP(R) class SC
LCL(L)(3) class FSC
LCS(S) class FSC
British ww2 Royal Navy

WW2 British Battleships
Queen Elisabeth class (1913)
Revenge class (1915)
Nelson class (1925)
King Georges V class (1939)
Lion class (Started)
HMS Vanguard (1944)
Renown class (1916)
HMS Hood (1920)

WW2 British Cruisers
British C class cruisers (1914-1922)
Hawkins class cruisers (1917)
British D class cruisers (1918)
Enterprise class cruisers (1919)
HMS Adventure (1924)
County class cruisers (1926)
York class cruisers (1929)
Surrey class cruisers (project)
Leander class cruisers (1931)
Arethusa class cruisers (1934)
Perth class cruisers (1934)
Town class cruisers (1936)
Dido class cruisers (1939)
Abdiel class cruisers (1939)
Fiji class cruisers (1941)
Bellona class cruisers (1942)
Swiftsure class cruisers (1943)
Tiger class cruisers (1944)

WW2 British Aircraft Carriers
Courageous class aircraft carriers (1928)
HMS Ark Royal (1937)
HMS Eagle (1918)
HMS Furious (1917)
HMS Hermes (1919)
Illustrious class (1939)
HMS Indomitable (1940)
Implacable class (1942)
Malta class (project)
HMS Unicorn (1941)
Colossus class (1943)
Majestic class (1944)
Centaur class (started 1944)

HMS Archer (1939)
HMS Argus (1917)
Avenger class (1940)
Attacker class (1941)
HMS Audacity (1941)
HMS Activity (1941)
HMS Pretoria Castle (1941)
Ameer class (1942)
Merchant Aircraft Carriers (1942)
Vindex class (1943)

WW2 British Destroyers
Shakespeare class (1917)
Scott class (1818)
V class (1917)
S class (1918)
W class (1918)
A/B class (1926)
C/D class (1931)
G/H/I class (1935)
Tribal class (1937)
J/K/N class (1938)
Hunt class DE (1939)
L/M class (1940)
O/P class (1942)
Q/R class (1942)
S/T/U//V/W class (1942)
Z/ca class (1943)
Ch/Co/Cr class (1944)
Battle class (1945)
Weapon class (1945)

WW2 British submarines
L9 class (1918)
HMS X1 (1923)
Oberon class (1926)
Parthian class (1929)
Rainbow class (1930)
Thames class (1932)
Swordfish class (1932)
HMS Porpoise (1932)
Grampus class (1935)
Shark class (1934)
Triton class (1937)
Undine class (1937)
U class (1940)
S class (1941)
T class (1941)
X-Craft midget (1942)
A class (1944)

WW2 British Amphibious Ships and Landing Crafts
LSI(L) class
LSI(M/S) class
LSI(H) class
LSS class
LSG class
LSC class
Boxer class LST

LST(2) class
LST(3) class
LSH(L) class
LSF classes (all)
LCI(S) class
LCS(L2) class
LCT(I) class
LCT(2) class
LCT(R) class
LCT(3) class
LCT(4) class
LCT(8) class
LCT(4) class
LCG(L)(4) class
LCG(M)(1) class

British ww2 Landing Crafts

WW2 British MTB/gunboats.
WW2 British MTBs
MTB-1 class (1936)
MTB-24 class (1939)
MTB-41 class (1940)
MTB-424 class (1944)
MTB-601 class (1942)
MA/SB class (1938)
MTB-412 class (1942)
MGB 6 class (1939)
MGB-47 class (1940)
MGB 321 (1941)
MGB 501 class (1942)
MGB 511 class (1944)
MGB 601 class (1942)
MGB 2001 class (1943)

WW2 British Gunboats

Denny class (1941)
Fairmile A (1940)
Fairmile B (1940)
HDML class (1940)

WW2 British Sloops
Bridgewater class (2090)
Hastings class (1930)
Shoreham class (1930)
Grimsby class (1934)
Bittern class (1937)
Egret class (1938)
Black Swan class (1939)

WW2 British Frigates
River class (1943)
Loch class (1944)
Bay class (1944)

WW2 British Corvettes
Kingfisher class (1935)
Shearwater class (1939)
Flower class (1940)
Mod. Flower class (1942)
Castle class (1943)

WW2 British Misc.
WW2 British Monitors
Roberts class monitors (1941)
Halcyon class minesweepers (1933)
Bangor class minesweepers (1940)
Bathurst class minesweepers (1940)
Algerine class minesweepers (1941)
Motor Minesweepers (1937)
ww2 British ASW trawlers
Basset class trawlers (1935)
Tree class trawlers (1939)
HMS Albatross seaplane carrier
WW2 British river gunboats

HMS Guardian netlayer
HMS Protector netlayer
HMS Plover coastal mines.
Medway class sub depot ships
HMS Resource fleet repair
HMS Woolwhich DD depot ship
HMS Tyne DD depot ship
Maidstone class sub depot ships
HmS Adamant sub depot ship

Athene class aircraft transport
British ww2 AMCs
British ww2 OBVs
British ww2 ABVs
British ww2 Convoy Escorts
British ww2 APVs
British ww2 SSVs
British ww2 SGAVs
British ww2 Auxiliary Mines.
British ww2 CAAAVs
British ww2 Paddle Mines.
British ww2 MDVs
British ww2 Auxiliary Minelayers
British ww2 armed yachts

✙ Axis ww2 Fleets

Japan ww2 Imperial Japanese Navy
WW2 Japanese Battleships
Kongō class Fast Battleships (1912)
Fuso class battleships (1915)
Ise class battleships (1917)
Nagato class Battleships (1919)
Yamato class Battleships (1941)
B41 class Battleships (project)

WW2 Japanese cruisers
Tenryū class cruisers (1918)
Kuma class cruisers (1919)
Nagara class (1920)
Sendai class Cruisers (1923)
IJN Yūbari (1923)
Furutaka class Cruisers (1925)
Aoba class heavy cruisers (1926)
Nachi class Cruisers (1927)
Takao class cruisers (1930)
Mogami class cruisers (1932)
Tone class cruisers (1937)
Katori class cruisers (1939)
Agano class cruisers (1941)
Oyodo (1943)

Seaplane & Aircraft Carriers
Hōshō (1921)
IJN Akagi (1925)
IJN Kaga (1927)
IJN Ryujo (1931)
IJN Soryu (1935)
IJN Hiryu (1937)
Shokaku class (1937)
Zuiho class (1936) comp.40
Ruyho (1933) comp.42
Junyo class (1941)
IJN Taiho (1943)
Chitose class (comp. 1943)
IJN Shinano (1944)
Unryu class (1944)
IJN Ibuki (1942)

Taiyo class (1940)
IJN Kaiyo (1938)
IJN Shinyo (1934)

Notoro (1920)
Kamoi (1922)
Chitose class (1936)
Mizuho (1938)
Nisshin (1939)

IJN Aux. Seaplane tenders
Akistushima (1941)
Shimane Maru class (1944)
Yamashiro Maru class (1944)

Imperial Japanese Navy Aviation

WW2 Japanese Destroyers
Mutsuki class (1925)
Fubuki class (1927)
Akatsuki class (1932)
Hatsuharu class (1932)
Shiratsuyu class (1935)
Asashio class (1936)
Kagero class (1938)
Yugumo class (1941)
Akitsuki class (1941)
IJN Shimakaze (1942)

WW2 Japanese Submarines
KD1 class (1921)
Koryu class
Kaiten class
Kairyu class
IJN Midget subs

WW2 Japanese Amphibious ships/Crafts
Shinshu Maru class (1935)
Akistu Maru class (1941)
Kumano Maru class (1944)
SS class LS (1942)
T1 class LS (1944)
T101 class LS (1944)
T103 class LS (1944)
Shohatsu class LC (1941)
Chuhatsu class LC (1942)
Moku Daihatsu class (1942)
Toku Daihatsu class (1944)

WW2 Japanese minelayers
IJN Armed Merchant Cruisers
WW2 Japanese Escorts
Tomozuru class (1933)
Otori class (1935)
Matsu class (1944)
Tachibana class (1944)
Ioshima class (1944)
WW2 Japanese Sub-chasers
WW2 Japanese MLs
Shinyo class SB

⚑ Neutral

Armada de Argentina Argentinian Navy

Rivadavia class Battleships
Cruiser La Argentina
Veinticinco de Mayo class cruisers
Argentinian Destroyers
Santa Fe class sub. Bouchard class minesweepers King class patrol vessels

Marinha do Brasil Brazilian Navy

Minas Gerais class Battleships (1912)
Cruiser Bahia
Brazilian Destroyers
Humaita class sub.
Tupi class sub.

Armada de Chile Armada de Chile

Almirante Latorre class battleships
Cruiser Esmeralda (1896)
Cruiser Chacabuco (1911)
Chilean DDs
Fresia class subs
Capitan O’Brien class subs

Søværnet Danish Navy

Niels Juel
Danish ww2 Torpedo-Boats Danish ww2 submarines Danish ww2 minelayer/sweepers

Merivoimat Finnish Navy

Coastal BB Ilmarinen
Finnish ww2 submarines
Finnish ww2 minelayers

Nautiko Hellenon Hellenic Navy

Greek ww2 Destroyers
Greek ww2 submarines
Greek ww2 minelayers

Marynarka Vojenna Polish Navy

Polish ww2 Destroyers
Polish ww2 cruisers
Polish ww2 minelayer/sweepers

Portuguese navy ww2 Portuguese Navy

Douro class DDs
Delfim class sub
Velho class gb
Albuquerque class gb
Nunes class sloops

Romanian Navy Romanian Navy

Romanian ww2 Destroyers
Romanian ww2 Submarines

Royal Norwegian Navy Sjøforsvaret

Norwegian ww2 Torpedo-Boats

Spanish Armada Spanish Armada

España class Battleships
Blas de Lezo class cruisers
Canarias class cruisers
Cervera class cruisers
Cruiser Navarra
Spanish Destroyers
Spanish Submarines
Dedalo seaplane tender
Spanish Gunboats
Spanish Minelayers

Svenska Marinen Svenska Marinen

Gustav V class BBs (1918)
Interwar swedish BB projects

Tre Kronor class (1943)
Gotland (1933)
Fylgia (1905)

Ehrernskjold class DDs (1926)
Psilander class DDs (1926)
Klas Horn class DDs (1931)
Romulus class DDs (1934)
Göteborg class DDs (1935)
Mode class DDs (1942)
Visby class DDs (1942)
Öland class DDs (1945)

Swedish ww2 TBs
Swedish ww2 Submarines
Swedish ww2 Minelayers
Swedish ww2 MTBs
Swedish ww2 Patrol Vessels
Swedish ww2 Minesweepers

Türk Donanmasi Turkish Navy

Turkish ww2 Destroyers
Turkish ww2 submarines

Royal Yugoslav Navy Royal Yugoslav Navy

Dubrovnik class DDs
Beograd class DDs
Hrabi class subs

Royal Thai Navy Royal Thai Navy

Taksin class
Ratanakosindra class
Sri Ayuthia class
Puket class
Tachin class
Sinsamudar class sub

minor navies Minor Navies

The Cold War

Royal Navy Royal Navy
Sovietskaya Flota Sovietskiy flot
US Navy USN (1990)

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