In the 17th century, a frigate was any warship built for speed and maneuverability, the description often used being "frigate-built". These could be warships carrying their principal batteries of carriage-mounted guns on a single deck or on two decks (with further smaller carriage-mounted guns usually carried on the forecastle and quarterdeck of the vessel). The term was generally used for ships too small to stand in the line of battle, although early line-of-battle ships were frequently referred to as frigates when they were built for speed.
In the 18th century, frigates were full-rigged ships, that is square-rigged on all three masts, they were built for speed and handiness, had a lighter armament than a ship of the line, and were used for patrolling and escort. In the definition adopted by the British Admiralty, they were rated ships of at least 28 guns, carrying their principal armaments upon a single continuous deck – the upper deck – while ships of the line possessed two or more continuous decks bearing batteries of guns.
In the late 19th century (beginning about 1858 with the construction of prototypes by the British and French navies), the armoured frigate was a type of ironclad warship that for a time was the most powerful type of vessel afloat. These were still described as "frigates" because such ships still mounted their principal armaments on a single continuous upper deck, in the manner of older sailing frigates. However, by the end of the 19th century, developments in ironclad warships had made this type of ship obsolete and the term "frigate" became obsolete.
During the Second World War the name 'frigate' was reintroduced to describe a seagoing escort ship intermediate in size between a corvette and a destroyer. After World War II, a wide variety of ships have been classified as frigates. Often there has been little consistency in usage. While some navies have regarded frigates as principally large ocean-going anti-submarine warfare (ASW) combatants, others have used the term to describe ships that are otherwise recognisable as corvettes, destroyers, and even nuclear-powered guided missile cruisers. Some European navies use the term "frigate" for both their destroyers and frigates. The rank "frigate captain" derives from the name of this type of ship.
- 1 Age of sail
- 2 Age of steam
- 3 Modern Era
- 4 Frigates in preservation
- 5 Operators
- 6 Future development
- 7 See also
- 8 References
- 9 External links
Age of sail
The term "frigate" (Italian: fregata; Dutch: fregat; Spanish/Catalan/Portuguese/Sicilian: fragata; French: frégate) originated in the Mediterranean in the late 15th century, referring to a lighter galley-type warship with oars, sails and a light armament, built for speed and maneuverability.
The etymology of the word remains uncertain, although it may have originated as a corruption of aphractus, a Latin word for an open vessel with no lower deck. Aphractus, in turn, derived from the Ancient Greek phrase ἄφρακτος ναῦς (aphraktos naus) – "undefended ship". In 1583, during the Eighty Years' War of 1568–1648, Habsburg Spain recovered the southern Netherlands from the Protestant rebels. This soon resulted in the use of the occupied ports as bases for privateers, the "Dunkirkers", to attack the shipping of the Dutch and their allies. To achieve this the Dunkirkers developed small, maneuverable, sailing vessels that came to be referred to as frigates. The success of these Dunkirker vessels influenced the ship design of other navies contending with them, but because most regular navies required ships of greater endurance than the Dunkirker frigates could provide, the term soon came to apply less exclusively to any relatively fast and elegant sail-only warship. In French, the term "frigate" gave rise to a verb – frégater, meaning 'to build long and low', and to an adjective, adding more confusion. Even the huge English Sovereign of the Seas could be described as "a delicate frigate" by a contemporary after her upper decks were reduced in 1651.
The navy of the Dutch Republic became the first navy to build the larger ocean-going frigates. The Dutch navy had three principal tasks in the struggle against Spain: to protect Dutch merchant ships at sea, to blockade the ports of Spanish-held Flanders to damage trade and halt enemy privateering, and to fight the Spanish fleet and prevent troop landings. The first two tasks required speed, shallowness of draft for the shallow waters around the Netherlands, and the ability to carry sufficient supplies to maintain a blockade. The third task required heavy armament, sufficient to stand up to the Spanish fleet. The first of the larger battle-capable frigates were built around 1600 at Hoorn in Holland. By the later stages of the Eighty Years' War the Dutch had switched entirely from the heavier ships still used by the English and Spanish to the lighter frigates, carrying around 40 guns and weighing around 300 tons.
The effectiveness of the Dutch frigates became most evident in the Battle of the Downs in 1639, encouraging most other navies, especially the English, to adopt similar designs.
The fleets built by the Commonwealth of England in the 1650s generally consisted of ships described as "frigates", the largest of which were two-decker "great frigates" of the third rate. Carrying 60 guns, these vessels were as big and capable as "great ships" of the time; however, most other frigates at the time were used as "cruisers": independent fast ships. The term "frigate" implied a long hull-design, which relates directly to speed (see hull speed) and which also, in turn, helped the development of the broadside tactic in naval warfare.
At this time, a further design evolved, reintroducing oars and resulting in galley frigates such as HMS Charles Galley of 1676, which was rated as a 32-gun fifth-rate but also had a bank of 40 oars set below the upper deck which could propel the ship in the absence of a favourable wind.
In Danish, the word "fregat" often applies to warships carrying as few as 16 guns, such as HMS Falcon, which the British classified as a sloop.
Under the rating system of the Royal Navy, by the middle of the 18th century, the term "frigate" was technically restricted to single-decked ships of the fifth rate, though small 28-gun frigates classed as sixth rate.
The classic sailing frigate, well-known today for its role in the Napoleonic wars, can be traced back to French developments in the second quarter of the 18th century. The French-built Médée of 1740 is often regarded as the first example of this type. These ships were square-rigged and carried all their main guns on a single continuous upper deck. The lower deck, known as the "gun deck", now carried no armament, and functioned as a "berth deck" where the crew lived, and was in fact placed below the waterline of the new frigates. The typical earlier cruiser had a partially armed lower deck, from which it was known as a 'half-battery' or demi-batterie ship. Removing the guns from this deck allowed the height of the hull upperworks to be lowered, giving the resulting 'true-frigate' much improved sailing qualities. The unarmed deck meant that the frigate's guns were carried comparatively high above the waterline; as a result, when seas were too rough for two-deckers to open their lower deck gun-ports, frigates were still able to fight with all their guns (see the action of 13 January 1797, for an example when this was decisive).
The Royal Navy captured a number of the new French frigates, including Médée, during the War of the Austrian Succession (1740–1748) and were impressed by them, particularly for their inshore handling capabilities. They soon built copies (ordered in 1747), based on a French privateer named Tygre, and started to adapt the type to their own needs, setting the standard for other frigates as the leading naval power. The first British frigates carried 28 guns including an upper deck battery of twenty-four 9-pounder guns (the remaining four smaller guns were carried on the quarter deck) but soon developed into fifth-rate ships of 32 or 36 guns including an upper deck battery of twenty-six 12-pounder guns, with the remaining six or ten smaller guns carried on the quarter deck and forecastle. Technically, 'rated ships' with fewer than 28 guns could not be classed as frigates but as "post ships"; however, in common parlance most post ships were often described as "frigates", the same casual misuse of the term being extended to smaller two-decked ships that were too small to stand in the line of battle.
A total of fifty-nine French sailing frigates were built between 1777 and 1790, with a standard design averaging a hull length of 135 ft (41 m) and an average draught of 13 ft (4.0 m). The new frigates recorded sailing speeds of up to 14 knots (26 km/h; 16 mph), significantly faster than their predecessor vessels.
In 1778, the British Admiralty introduced a larger "heavy" frigate, with a main battery of twenty-six or twenty-eight 18-pounder guns (with smaller guns carried on the quarter deck and forecastle). This move may reflect the naval conditions at the time, with both France and Spain as enemies the usual British preponderance in ship numbers was no longer the case and there was pressure on the British to produce cruisers of individually greater force. In reply, the first French 18-pounder frigates were laid down in 1781. The 18-pounder frigate eventually became the standard frigate of the French Revolutionary and Napoleonic Wars. The British produced larger, 38-gun, and slightly smaller, 36-gun, versions and also a 32-gun design that can be considered an 'economy version'. The 32-gun frigates also had the advantage that they could be built by the many smaller, less-specialised shipbuilders.
Frigates could (and usually did) additionally carry smaller carriage-mounted guns on their quarter decks and forecastles (the superstructures above the upper deck). In 1778 the Carron Iron Company of Scotland produced a naval gun which would revolutionise the armament of smaller naval vessels, including the frigate. The carronade was a large calibre, short-barrelled naval cannon which was light, quick to reload and needed a smaller crew than a conventional long gun. Due to its lightness it could be mounted on the forecastle and quarter deck of frigates. It greatly increased the firepower, measured in weight of metal (the combined weight of all projectiles fired in one broadside), of these vessels. The disadvantages of the carronade were that it had a much shorter range and was less accurate than a long gun. The British quickly saw the advantages of the new weapon and soon employed it on a wide scale. The US Navy also copied the design soon after its appearance. The French and other nations eventually adopted variations of the weapon in succeeding decades. The typical heavy frigate had a main armament of 18-pounder long guns, plus 32-pounder carronades mounted on its upper decks.
The first 'super-heavy frigates', armed with 24-pounder long guns, were built by the naval architect F H Chapman for the Swedish navy in 1782. Because of a shortage of ships-of-the-line, the Swedes wanted these frigates, the Bellona class, to be able to stand in the battle line in an emergency. In the 1790s the French built a small number of large 24-pounder frigates, such as Forte and Egyptienne, they also cut-down (reduced the height of the hull to give only one continuous gun deck) a number of older ships-of-the-line (including Diadème) to produce super-heavy frigates, the resulting ship was known as a rasée. It is not known whether the French were seeking to produce very potent cruisers or merely to address stability problems in old ships. The British, alarmed by the prospect of these powerful heavy frigates, responded by rasée-ing three of the smaller 64-gun battleships, including Indefatigable, which went on to have a very successful career as a frigate. At this time the British also built a few 24-pounder-armed large frigates, the most successful of which was HMS Endymion (1,277 tons).
In 1797, three of the United States Navy's first six major ships were rated as 44-gun frigates, which operationally carried fifty-six to sixty 24-pounder long guns and 32-pounder or 42-pounder carronades on two decks; they were exceptionally powerful. These ships were so large, at around 1,500 tons, and well-armed that they were often regarded as equal to ships of the line, and after a series of losses at the outbreak of the War of 1812, Royal Navy fighting instructions ordered British frigates (usually of 38 guns or less) to never engage the large American frigates at any less than a 2:1 advantage. USS Constitution, preserved as a museum ship by the US Navy, is the oldest commissioned warship afloat, and is a surviving example of a frigate from the Age of Sail. Constitution and her sister ships President and United States were created in a response to deal with the Barbary Coast pirates and in conjunction with the Naval Act of 1794. Joshua Humphreys proposed that only live oak, a tree that grew only in America, should be used to build these ships. 
The British, wounded by repeated defeats in single-ship actions, responded to the success of the American 44s in three ways. They built a class of conventional 40-gun, 24-pounder armed frigates on the lines of Endymion. They cut down three old 74-gun Ships-of-the-Line into rasées, producing frigates with a 32-pounder main armament, supplemented by 42-pounder carronades. These had an armament that far exceeded the power of the American ships. Finally, Leander and Newcastle, 1,500-ton spar-decked frigates (with an enclosed waist, giving a continuous line of guns from bow to stern at the level of the quarter deck/forecastle), were built, which were an almost exact match in size and firepower to the American 44-gun frigates.
Frigates were perhaps the hardest-worked of warship types during the Age of Sail. While smaller than a ship-of-the-line, they were formidable opponents for the large numbers of sloops and gunboats, not to mention privateers or merchantmen. Able to carry six months' stores, they had very long range; and vessels larger than frigates were considered too valuable to operate independently.
Frigates scouted for the fleet, went on commerce-raiding missions and patrols, and conveyed messages and dignitaries. Usually, frigates would fight in small numbers or singly against other frigates. They would avoid contact with ships-of-the-line; even in the midst of a fleet engagement it was bad etiquette for a ship of the line to fire on an enemy frigate which had not fired first. Frigates were involved in fleet battles, often as "repeating frigates". In the smoke and confusion of battle, signals made by the fleet commander, whose flagship might be in the thick of the fighting, might be missed by the other ships of the fleet. Frigates were therefore stationed to windward or leeward of the main line of battle, and had to maintain a clear line of sight to the commander's flagship. Signals from the flagship were then repeated by the frigates, which themselves standing out of the line and clear from the smoke and disorder of battle, could be more easily seen by the other ships of the fleet. If damage or loss of masts prevented the flagship from making clear conventional signals, the repeating frigates could interpret them and hoist their own in the correct manner, passing on the commander's instructions clearly.
For officers in the Royal Navy, a frigate was a desirable posting. Frigates often saw action, which meant a greater chance of glory, promotion, and prize money.
Unlike larger ships that were placed in ordinary, frigates were kept in service in peacetime as a cost-saving measure and to provide experience to frigate captains and officers which would be useful in wartime. Frigates could also carry marines for boarding enemy ships or for operations on shore; in 1832, the frigate USS Potomac landed a party of 282 sailors and Marines ashore in the US Navy's first Sumatran expedition.
Frigates remained a crucial element of navies until the mid-19th century. The first ironclads were classified as "frigates" because of the number of guns they carried. However, terminology changed as iron and steam became the norm, and the role of the frigate was assumed first by the protected cruiser and then by the light cruiser.
Frigates are often the vessel of choice in historical naval novels due to their relative freedom compared to ships-of-the-line (kept for fleet actions) and smaller vessels (generally assigned to a home port and less widely ranging). For example, the Patrick O'Brian Aubrey–Maturin series, C. S. Forester's Horatio Hornblower series and Alexander Kent's Richard Bolitho series. The motion picture Master and Commander: The Far Side of the World features a reconstructed historic frigate, HMS Rose, to depict Aubrey's frigate HMS Surprise.
Age of steam
Vessels classed as frigates continued to play a great role in navies with the adoption of steam power in the 19th century. In the 1830s, navies experimented with large paddle steamers equipped with large guns mounted on one deck, which were termed "paddle frigates".
From the mid-1840s on, frigates which more closely resembled the traditional sailing frigate were built with steam engines and screw propellers. These "screw frigates", built first of wood and later of iron, continued to perform the traditional role of the frigate until late in the 19th century.
From 1859, armour was added to ships based on existing frigate and ship of the line designs. The additional weight of the armour on these first ironclad warships meant that they could have only one gun deck, and they were technically frigates, even though they were more powerful than existing ships-of-the-line and occupied the same strategic role. The phrase "armoured frigate" remained in use for some time to denote a sail-equipped, broadside-firing type of ironclad.
After 1875, the term "frigate" fell out of use. Vessels with armoured sides were designated as "battleships" or "armoured cruisers", while "protected cruisers" only possessed an armoured deck, and unarmoured vessels, including frigates and sloops, were classified as "unprotected cruisers".
World War II
Modern frigates are related to earlier frigates only by name. The term "frigate" was readopted during the Second World War by the British Royal Navy to describe an anti-submarine escort vessel that was larger than a corvette, while smaller than a destroyer. Equal in size and capability to the American destroyer escort, frigates are usually less expensive to build and maintain. Anti-submarine escorts had previously been classified as sloops by the Royal Navy, and the Black Swan-class sloops of 1939–1945 were as large as the new types of frigate, and more heavily armed. Twenty-two of these were reclassified as frigates after the war, as were the remaining 24 smaller Castle-class corvettes.
The frigate was introduced to remedy some of the shortcomings inherent in the Flower-class corvette design: limited armament, a hull form not suited to open-ocean work, a single shaft which limited speed and manoeuvrability, and a lack of range. The frigate was designed and built to the same mercantile construction standards (scantlings) as the corvette, allowing manufacture by yards unused to warship construction. The first frigates of the River class (1941) were essentially two sets of corvette machinery in one larger hull, armed with the latest Hedgehog anti-submarine weapon.
The frigate possessed less offensive firepower and speed than a destroyer, but such qualities were not required for anti-submarine warfare. Submarines were slow while submerged, and ASDIC sets did not operate effectively at speeds of over 20 knots (23 mph; 37 km/h). Rather, the frigate was an austere and weatherly vessel suitable for mass-construction and fitted with the latest innovations in anti-submarine warfare. As the frigate was intended purely for convoy duties, and not to deploy with the fleet, it had limited range and speed.
It was not until the Royal Navy's Bay class of 1944 that a British design classified as a "frigate" was produced for fleet use, although it still suffered from limited speed. These anti-aircraft frigates, built on incomplete Loch-class frigate hulls, were similar to the United States Navy's destroyer escorts (DE), although the latter had greater speed and offensive armament to better suit them to fleet deployments. The destroyer escort concept came from design studies by the General Board of the United States Navy in 1940, as modified by requirements established by a British commission in 1941 prior to the American entry into the war, for deep-water escorts. The American-built destroyer escorts serving in the British Royal Navy were rated as Captain-class frigates. The U.S. Navy's two Canadian-built Asheville-class and 96 British-influenced, American-built Tacoma-class frigates that followed originally were classified as "patrol gunboats" (PG) in the U.S. Navy but on 15 April 1943 were all reclassified as patrol frigates (PF).
The introduction of the surface-to-air missile after World War II made relatively small ships effective for anti-aircraft warfare: the "guided missile frigate". In the USN, these vessels were called "ocean escorts" and designated "DE" or "DEG" until 1975 – a holdover from the World War II destroyer escort or "DE". The Royal Canadian Navy and British Royal Navy maintained the use of the term "frigate"; likewise, the French Navy refers to missile-equipped ship, up to cruiser-sized ships ( Suffren, Tourville, and Horizon classes), by the name of "frégate", while smaller units are named aviso. The Soviet Navy used the term "guard-ship" (сторожевой корабль).
From the 1950s to the 1970s, the United States Navy commissioned ships classed as guided missile frigates (hull classification symbol DLG or DLGN, literally meaning guided missile destroyer leaders), which were actually anti-aircraft warfare cruisers built on destroyer-style hulls. These had one or two twin launchers per ship for the RIM-2 Terrier missile, upgraded to the RIM-67 Standard ER missile in the 1980s. This type of ship was intended primarily to defend aircraft carriers against anti-ship cruise missiles, augmenting and eventually replacing converted World War II cruisers (CAG/CLG/CG) in this role. The guided missile frigates also had an anti-submarine capability that most of the World War II cruiser conversions lacked. Some of these ships – Bainbridge and Truxtun along with the California and Virginia classes – were nuclear-powered (DLGN). These "frigates" were roughly mid-way in size between cruisers and destroyers. This was similar to the use of the term "frigate" during the age of sail during which it referred to a medium-sized warship, but it was inconsistent with conventions used by other contemporary navies which regarded frigates as being smaller than destroyers. During the 1975 ship reclassification, the large American frigates were redesignated as guided missile cruisers or destroyers (CG/CGN/DDG), while ocean escorts (the American classification for ships smaller than destroyers, with hull symbol DE/DEG (destroyer escort)) were reclassified as frigates (FF/FFG), sometimes called "fast frigates". In the late 1970s the US Navy introduced the 51-ship Oliver Hazard Perry-class guided missile frigates (FFG), the last of which was decommissioned in 2015, although some serve in other navies. By 1995 the older guided missile cruisers and destroyers were replaced by the Ticonderoga-class cruisers and Arleigh Burke-class destroyers.
One of the most successful post-1945 designs was the British Leander-class frigate, which was used by several navies. Laid down in 1959, the Leander class was based on the previous Type 12 anti-submarine frigate but equipped for anti-aircraft use as well. They were used by the UK into the 1990s, at which point some were sold onto other navies. The Leander design, or improved versions of it, were licence-built for other navies as well.
Nearly all modern frigates are equipped with some form of offensive or defensive missiles, and as such are rated as guided-missile frigates (FFG). Improvements in surface-to-air missiles (e.g., the Eurosam Aster 15) allow modern guided-missile frigates to form the core of many modern navies and to be used as a fleet defence platform, without the need for specialised anti-air warfare frigates.
The Royal Navy Type 61 Salisbury class were "air direction" frigates equipped to track aircraft. To this end they had reduced armament compared to the Type 41 Leopard-class air-defence frigates built on the same hull.
Multi-role frigates like the MEKO 200, Anzac and Halifax classes are designed for navies needing warships deployed in a variety of situations that a general frigate class would not be able to fulfill and not requiring the need for deploying destroyers.
At the opposite end of the spectrum, some frigates are specialised for anti-submarine warfare. Increasing submarine speeds towards the end of World War II (see German Type XXI submarine) greatly reduced the margin of speed superiority of frigate over submarine. The frigate could no longer be slow and powered by mercantile machinery and consequently postwar frigates, such as the Whitby class, were faster.
Such ships carry improved sonar equipment, such as the variable depth sonar or towed array, and specialised weapons such as torpedoes, forward-throwing weapons such as Limbo and missile-carried anti-submarine torpedoes such as ASROC or Ikara. The Royal Navy's original Type 22 frigate is an example of a specialised anti-submarine warfare frigate, also it also has Sea Wolf surface-to-air missiles for point defense plus Exocet surface-to-surface missiles for limited offensive capability.
Especially for anti-submarine warfare, most modern frigates have a landing deck and hangar aft to operate helicopters, eliminating the need for the frigate to close with unknown sub-surface threats, and using fast helicopters to attack nuclear submarines which may be faster than surface warships. For this task the helicopter is equipped with sensors such as sonobuoys, wire-mounted dipping sonar and magnetic anomaly detectors to identify possible threats, and torpedoes or depth-charges to attack them.
With their onboard radar helicopters can also be used to reconnoitre over-the-horizon targets and, if equipped with anti-ship missiles such as Penguin or Sea Skua, to attack them. The helicopter is also invaluable for search and rescue operation and has largely replaced the use of small boats or the jackstay rig for such duties as transferring personnel, mail and cargo between ships or to shore. With helicopters these tasks can be accomplished faster and less dangerously, and without the need for the frigate to slow down or change course.
Air defence role
Frigates designed in the 1960s and 1970s, such as the US Navy's Knox-class frigate, West Germany's Bremen-class frigate, and Royal Navy's Type 22 frigate were equipped with a small number of short-ranged surface-to-air missiles (Sea Sparrow or Sea Wolf) for point defense only.
By contrast newer frigates starting with the Oliver Hazard Perry-class frigate are specialised for "zone-defense" air defence, because of the major developments in fighter jets and ballistic missiles. Recent examples include the De Zeven Provinciën-class air defence and command frigate of the Royal Netherlands Navy. These ships are armed with VL Standard Missile 2 Block IIIA, one or two Goalkeeper CIWS systems, (HNLMS Evertsen has two Goalkeepers, the rest of the ships have the capacity for another one.) VL Evolved Sea Sparrow Missiles, a special SMART-L radar and a Thales Active Phased Array Radar (APAR), all of which are for air defence. Another example is the Iver Huitfeldt class of the Royal Danish Navy.
Stealth technology has been introduced in modern frigate design by the French La Fayette class design. Frigate shapes are designed to offer a minimal radar cross section, which also lends them good air penetration; the maneuverability of these frigates has been compared to that of sailing ships. Examples are the Italian and French Horizon class with the Aster 15 and Aster 30 missile for anti-missile capabilities, the German F125 and Sachsen-class frigates, the Turkish TF2000 type frigates with the MK-41 VLS, the Indian Shivalik, Talwar and Nilgiri classes with the Brahmos missile system and the Malaysian Maharaja Lela class with the Naval Strike Missile.
The modern French Navy applies the term first-class frigate and second-class frigate to both destroyers and frigates in service. Pennant numbers remain divided between F-series numbers for those ships internationally recognised as frigates and D-series pennant numbers for those more traditionally recognised as destroyers. This can result in some confusion as certain classes are referred to as frigates in French service while similar ships in other navies are referred to as destroyers. This also results in some recent classes of French ships such as the Horizon class being among the largest in the world to carry the rating of frigate.
The Frégates de Taille Intermédiaire (FTI), which means frigates of intermediate size, is a French military program to design and create a planned class of frigates to be used by the French Navy. At the moment, the program consists of five ships, with commissioning planned from 2023 onwards.
In the German Navy, frigates were used to replace aging destroyers; however in size and role the new German frigates exceed the former class of destroyers. The future German F125-class frigates will be the largest class of frigates worldwide with a displacement of more than 7,200 tons. The same was done in the Spanish Navy, which went ahead with the deployment of the first Aegis frigates, the Álvaro de Bazán-class frigates.
The Myanmar Navy is producing modern frigates with a reduced radar cross section known as the Kyan Sittha-class frigate. Before the Kyan Sittha class, the Myanmar Navy also produced an Aung Zeya-class frigate. Although the size of Myanmar Navy is quite small, it is producing modern guided-missile frigates with the help of Russia, China, and India. However, the fleets of the Myanmar Navy are still expanding with several on-going ship-building programmes, including one 135 m (442 ft 11 in), 4,000-tonne frigate with the vertical missile launch systems.
Littoral combat ship (LCS)
Some new classes of ships similar to corvettes are optimized for high-speed deployment and combat with small craft rather than combat between equal opponents; an example is the U.S. littoral combat ship (LCS). As of 2015, all Oliver Hazard Perry-class frigates in the United States Navy have been decommissioned, and their role partially being assumed by the new LCS. While the LCS class ships are smaller than the frigate class they will replace, they offer a similar degree of weaponry while requiring less than half the crew complement and offering a top speed of over 40 knots (74 km/h; 46 mph). A major advantage for the LCS ships is that they are designed around specific mission modules allowing them to fulfill a variety of roles. The modular system also allows for most upgrades to be performed ashore and installed later into the ship, keeping the ships available for deployment for the maximum time.
The latest U.S. deactivation plans means that this is the first time that the U.S. Navy has been without a frigate class of ships since 1943 (technically USS Constitution is rated as a frigate and is still in commission, but does not count towards Navy force levels).
The remaining 20 LCSs to be acquired from 2019 and onwards that will be enhanced will be designated as frigates, and existing ships given modifications may also have their classification changed to FF as well.
Frigates in preservation
A few frigates have survived as museum ships. They are:
Original sailing frigates
- USS Constitution in Boston, United States. Second oldest commissioned warship in the world, oldest commissioned warship afloat. Active as the flagship of the United States Navy.
- NRP Dom Fernando II e Glória in Almada, Portugal.
- HMS Trincomalee in Hartlepool, England.
- HMS Unicorn in Dundee, Scotland.
Replica sailing frigates
- Hermione, sailing replica of the 1779 Hermione which carried Lafayette to the United States.
- Étoile du Roy, originally named Grand Turk was built for the TV series Hornblower in 1997. She was sold to France in 2010 and renamed Étoile du Roy.
- Russian frigate Shtandart, a sailing replica of Russia's first warship, homeported in Saint Petersburg, Russia.
- HMS Surprise in San Diego, United States, replica of HMS Rose, used in the film, Master and Commander: The Far Side of the World.
- HNLMS Bonaire in Den Helder, Netherlands.
- Danish frigate Jylland in Ebeltoft, Denmark.
- Japanese frigate Kaiyō Maru, replica in Esashi, Japan.
- HMS Warrior in Portsmouth, England.
- ARA Presidente Sarmiento in Buenos Aires, Argentina.
Modern era frigates
- HDMS Peder Skram in Copenhagen, Denmark.
- HMAS Diamantina in Brisbane, Australia.
- TCG Ege (F256), formerly USS Ainsworth in Izmit, Turkey.
- ROKS Taedong (PF-63), formerly USS Tacoma in South Korea.
- ROKS Ulsan (FF-951), in Ulsan, South Korea.
- ROKS Seoul (FF-952), in Seoul, South Korea.
- HTMS Tachin (PF-1), formerly USS Glendale in Nakhon Nayok, Thailand.
- HTMS Prasase (PF-2), formerly USS Gallup in Rayong Province, Thailand.
- HTMS Phutthaloetla Naphalai in Sattahip, Thailand.
- HTMS Phutthayotfa Chulalok in Sattahip, Thailand.
- CNS Nanchong (FF-502) in Qingdao, China.
- CNS Yingtan (FFG-531) in Qingdao, China.
- CNS Xiamen (FFG-515) in Taizhou, China.
- HMS President in London, England.
- HMS Wellington in London, England.
- HNoMS Narvik in Horten, Norway.
- KD Hang Tuah in Lumut, Malaysia.
- UBS Mayu in Yangon, Myanmar
- Dominican frigate Mella was on display in the Dominican Republic from 1998-2003, when she was scrapped due to her deteriorating condition.
- KD Rahmat was on display in Lumut, Malaysia from 2011-2017. She sank at her moorings due to poor condition, and was later scrapped.
- RFS Druzhnyy was on display in Moscow, Russia from 2002-2016, until the museum plans fell through and was sold for scrap.
- HMS Plymouth (F126) was on display in Birkenhead, England from 1990-2006, when the museum that operated her was forced to close. She was later scrapped in 2012.
- Algerian National Navy operates three Koni-class frigates, three Adhafer-class frigates, and two MEKO 200 frigates.
- Argentine Navy operates six Espora-class frigates.
- Royal Australian Navy operates eight Anzac-class frigates.
- Azerbaijani Navy operates a single Petya-class frigate.
- Royal Bahrain Naval Force operates a single Oliver Hazard Perry-class frigate donated from the United States.
- Bangladesh Navy operates a single modified Ulsan-class frigate, two Jiangwei II-class frigates, and two Jianghu-class frigates, purchased from China.
- Belgian Navy operates two Karel Doorman-class frigates purchased from The Netherlands.
- Brazilian Navy operates six Niterói-class frigates and two Type 22 frigates purchased from the United Kingdom.
- Bulgarian Navy operates three Wielingen-class frigates, purchased from Belgium, and a single Koni-class frigate.
- Royal Canadian Navy operates twelve Halifax-class frigates.
- Chilean Navy operates three Type 23 frigates and a single Type 22 frigate, purchased from the United Kingdom, two Adelaide-class frigates, purchased from Australia, and two Karel Doorman-class frigate, purchased from The Netherlands.
- People's Liberation Army Navy operates 31 Jiangkai II-class frigates, two Jiangkai I-class frigates, seven Jiangwei II-class frigates, and six Jianghu-class frigates.
- China Coast Guard operates three Jiangwei I-class frigates transferred from the navy.
- Republic of China Navy operates 10 Cheng Kung-class frigates, which are the Taiwanese variant of the US Oliver Hazard Perry class, six Knox-class frigates, purchased from the United States, and six Kang Ding-class frigates, which are the Taiwanese variant of the French La Fayette class.
- Colombian National Navy operates four Almirante Padilla-class frigates.
- Royal Danish Navy operates four Thetis-class frigates, three Iver Huitfeldt-class frigates and two Absalon-class frigates.
- Ecuadorian Navy operates two Condell-class frigates purchased from Chile.
- Egyptian Navy two Oliver Hazard Perry-class frigates and two Knox-class frigates purchased from the United States.
- Navy of Equatorial Guinea operates a single Wele-Nzas-class frigate.
- French Navy Operates five La Fayette-class frigates and six Floréal-class frigates.
- German Navy Operates four Brandenburg-class frigates, and a single Bremen-class frigate.
- Hellenic Navy operates nine Elli-class frigates, purchased from the Netherlands and four Hydra-class frigates.
- Indian Navy operates three Shivalik-class frigates, six Talwar-class frigates, three Brahmaputra-class frigates, and a single Godavari-class frigate.
- Indonesian Navy operates two Martadinata-class frigates, and five Van Speijk-class frigates, purchased from the Netherlands.
- Islamic Republic of Iran Navy operates three Alvand-class frigates.
- Italian Navy operates ten Bergamini-class frigates and four Maestrale-class frigates.
- Korean People's Army Naval Force operates two Najin-class frigates.
- Republic of Korea Navy operates six Incheon-class frigates, four Ulsan-class frigates, and two Daegu-class frigates.
- Libyan Navy operates a single Koni-class frigate.
- Royal Malaysian Navy operates two Lekiu-class frigates.
- Mexican Navy operates four Knox-class frigates purchased from the United States and a single Reformador-class frigate.
- Montenegrin Navy operates two Kotor-class frigates.
- Royal Moroccan Navy two Floréal-class frigates, ordered from France and three Tarik Ben Ziyad-class frigates.
- Myanmar Navy operates two Kyan Sittha-class frigates. The ships were built with the assistance of Russia, China and India. These stealthy ships are armed with C-802 anti-ship missiles. The Myanmar Navy is constructing a new frigate which is 135 m (442 ft 11 in) long and displaces 4,000 tonnes. Myanmar also operates a single Aung Zeya-class frigate, and two Type 053 frigates purchased from China.
- Royal Netherlands Navy operates two Karel Doorman-class frigates.
- Royal New Zealand Navy operates two Anzac-class frigates.
- Nigerian Navy operates a single, Aradu-class frigate, though its operational status is doubtful.
- Pakistan Navy operates four Chinese-built Zulfiquar-class frigates and a single Oliver Hazard Perry-class frigate, purchased from the United States.
- Peruvian Navy operates seven Lupo-class frigates, with four being transferred from Italy.
- Peru Coast Guard operates a single Lupo-class frigate, transferred from the Navy.
- Philippine Navy operates two Jose Rizal-class frigates. Their design is based on the ROK Navy's Incheon-class frigate.
- Polish Navy operates two Oliver Hazard Perry-class frigates, purchased from the United States.
- Portuguese Navy operates three Vasco da Gama-class frigates, and two Karel Doorman-class frigates, purchased from the Netherlands.
- Romanian Naval Forces operates two Type 22 frigates, purchased from the United Kingdom.
- Russian Navy operates eight Steregushchiy-class frigates, three Admiral Grigorovich-class frigates, two Admiral Gorshkov-class frigates, two Gepard-class frigates, two Krivak-class frigate, and two Neustrashimyy-class frigates.
- Coast Guard of the Border Service of the FSB operates two Krivak-class frigates.
- Royal Saudi Navy operates three Al Riyadh-class frigates, which are the Saudi variant of the French La Fayette class, and four Al Madinah-class frigates.
- Republic of Singapore Navy operates six Formidable-class frigates, these ships are the Singapore variant of the French La Fayette class.
- South African Navy operates four Valour-class frigates, made in Germany based on the MEKO A200 design.
- Spanish Navy Operates five Santa María-class frigates, these ships are the Spanish variant of the American Oliver Hazard Perry class.
- Sri Lanka Navy operates a single Jiangwei I-class frigate purchased from China.
- Syrian Arab Navy operates a single Petya-class frigate, though its operational status is doubtful.
- Royal Thai Navy operates a single Bhumibol Adulyadej-class frigate, two Naresuan-class frigate, and four Jianghu-class frigates, purchased from China.
- Turkish Naval Forces operates eight Oliver Hazard Perry-class frigates purchased from the United States, four Yavuz-class frigates, and four Barbaros-class frigates.
- Royal Navy operates 13 Type 23 anti-submarine frigates. Named after British dukes, these ships were built in the 1980s and 1990s and have received numerous refits and upgrades during their life. 16 frigates in total were built although 3 of these were later sold and recommissioned into the Chilean Navy. They are due to be replaced by the Type 26, Type 31 and Type 32 frigates, with the last Type 23 due to retire in 2036. 
- Ukrainian Navy operates a single Krivak-class frigate.
- National Navy of Uruguay operates a single João Belo-class frigate, purchased from Portugal.
- Bolivarian Navy of Venezuela operates six Lupo-class frigates, though only three are reported operational.
- Vietnam People's Navy operates five Petya-class frigates and two Gepard-class frigates.
These ships are classified by their respective nations as frigates, but are considered destroyers internationally due to size, armament, and role.
- German Navy operates three Sachsen-class frigates and three Baden-Württemberg-class frigates.
- Islamic Republic of Iran Navy operates three Moudge-class frigates, these ships are internationally regarded as frigates or destroyer escorts.
- Royal Netherlands Navy operates four De Zeven Provinciën-class frigates.
- Royal Norwegian Navy operates four Fridtjof Nansen-class frigates.
- Romanian Naval Forces operates the Romanian frigate Mărășești, classified as a destroyer until 2001.
- Spanish Navy operates five Álvaro de Bazán-class frigates.
- Cuban Revolutionary Navy decommissioned its last Koni-class frigate in 1998.
- Dominican Navy decommissioned its last River-class frigate in 1998.
- Ethiopian Navy lost its entire fleet, including two Petya-class frigates and the training frigate Ethiopia, following the independence of Eritrea in 1991.
- Estonian Navy decommissioned EML Admiral Pitka in 2013.
- Finnish Navy decommissioned its last Riga-class frigate in 1985.
- Volksmarine decommissioned all four Riga-class frigates upon German Reunification in 1990.
- Israeli Navy decommissioned its last River-class frigate in 1959.
- Navy of Serbia and Montenegro transferred its two Kotor-class frigates to Montenegro upon their independence in 2006.
- Swedish Navy decommissioned its last two Visby-class frigates in 1982, following defense reviews.
- United States Navy decommissioned its last Oliver Hazard Perry-class frigate in 2015.
- Republic of Vietnam Navy transferred its six remaining Trần Quang Khải-class frigates to The Philippines following the Fall of Saigon in 1975. The seventh ship was captured by North Vietnam and recommissioned into the Vietnam People's Navy.
- Algerian National Navy has ordered three Steregushchiy-class frigates from Russia.
- Royal Australian Navy has ordered nine Hunter-class frigates. These ships are the Australian variant of the Type 26 frigates, and will carry the AGEIS combat system.
- Belgian Navy is planning to build two Anti-Submarine Warfare frigates to replace the current Karel Doorman-class frigates. It is a joint project with the Netherlands.
- Brazilian Navy has ordered four Tamandaré-class frigates. These ships will replace Brazil's aging Niterói-class frigates.
- Royal Canadian Navy has ordered 15 Type 26 frigates as the design for the Canadian Surface Combatant. These ships will replace the decommissioned Iroquois-class destroyers and Halifax-class frigates.
- People's Liberation Army Navy is continuing to build Jiangkai II-class frigates.
- Republic of China Navy is planning to build 10–15 new frigates to replace the aging Knox class and Cheng Kung class.
- Egyptian Navy recently acquired two Bergamini-class frigates from Italy while still under construction. They will replace Egypt's two recently decommissioned Jianghu-class frigates.
- Finnish Navy is planning to build four Pohjanmaa-class corvettes. These vessels, despite their classification have been described as frigates by the Finnish defense ministry and lead to a debate over the classification in the Finnish Parliament.
- French Navy is currently building five Amiral Ronarc'h-class frigates. These ships will replace the La Fayette-class frigates.
- German Navy will commission one more Baden-Württemberg-class frigate and is currently planning to build four MKS 180 frigates to replace the Brandenburg-class frigates.
- Indian Navy will acquire three incomplete Admiral Grigorovich-class frigates from Russia. Russia was unable to finish the vessels due to their gas turbine engines being built in Ukraine. Ukraine refused to supply Russia with the engines following the 2014 Annexation of Crimea. India is also building seven Nilgiri-class frigates to replace the Godavari-class frigates.
- Indonesian Navy is expected to order additional Martadinata-class frigates to replace the aging Van Speijk-class frigates.
- Hellenic Navy is currently researching a design to replacing its aging Elli-class frigates.
- Italian Navy is building 16 Thaon di Revel-class frigates. These vessels will replace the decommissioned Lupo-class frigates and Minerva-class corvettes. Italy is also planning to commission two more Bergamini-class frigates.
- Islamic Republic of Iran Navy is currently building four more Moudge-class frigates.
- Japan Maritime Self-Defense Force is currently building four Mogami-class frigates. These ships will replace the Abukuma-class destroyer escorts.
- Republic of Korea Navy is currently building six more Daegu-class frigates. These ships will replace the aging Ulsan-class frigates.
- Mexican Navy will commission one more Reformador-class frigate.
- Royal Malaysian Navy is currently building six Maharaja Lela-class frigates and currently planning for 12 ships for the class.
- Royal Netherlands Navy is planning to build two Anti-Submarine Warfare frigates to replace the current Karel Doorman-class frigates. It is a joint project with Belgium.
- Pakistan Navy has ordered four Jiangkai II-class frigates from China. These ships will replace Pakistan's aging Tariq-class destroyers.
- Polish Navy has begun development for its Miecznik frigate program.
- Russian Navy is currently building eight more Admiral Gorshkov-class frigates and two more Steregushchiy-class frigates.
- Royal Saudi Navy ordered an four upgraded versions of the Freedom-class littoral combat ship from the United States. These ships are to replace the aging Al Madinah-class frigates.
- Spanish Navy is currently planning to build five F110-class frigates. These ships will replace Spain's Santa María-class frigates.
- Royal Thai Navy is currently building an additional Bhumibol Adulyadej-class frigate.
- Turkish Naval Forces is currently building the Istanbul-class frigates as a part of the MILGEM project.
- Ukrainian Navy is currenlty building four Volodymyr Velykyi-class frigates. These ships will help rebuild the Ukrainian Navy, which has been depleted since the capture of most of its navy following the 2014 Russian Annexation of Crimea. Additionally, the United States has offered to transfer two Oliver Hazard Perry-class frigates to Ukraine, the offer is still under consideration.
- Royal Navy is currently building eight Type 26 frigates. These ships, along with five planned Type 31 frigates will replace the Type 23 frigates currently in service. Additionally, four Type 32 frigates are also planned to supplement the Royal Navy's strength.
- United States Navy is currently building 20 Constellation-class frigates. These ships are a variant of the FREMM multipurpose frigate and will replace the decommissioned Oliver Hazard Perry-class frigates.
- Frigate 36, a sailboat design, named in honour of the warship class
- Udaloy-class destroyer, a destroyer design officially named Project 1155 Fregat, which translates to frigate or frigatebird
- List of escorteurs of the French Navy
- List of frigate classes
- List of frigate classes by country
- List of frigates of World War II
- United States Navy 1975 ship reclassification
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- ^ Gardiner & Lavery (1992), p. 40.
- ^ Archibald, Roger. 1997. Six ships that shook the world. American Heritage of Invention & Technology 13, (2): 24.
- ^ Gardiner (2000), pp. 48–56.
- ^ Lavery (1989), pp. 49, 298–300.
- ^ a b c Encyclopædia Britannica. 17. p. 469.
- ^ ARG. "Top 10 Frigates | Military-Today.com" . www.military-today.com. Archived from the original on 29 June 2017. Retrieved 13 July 2017.
- ^ Gardiner (1980), p. 149.
- ^ Bauer & Roberts (1991), pp. 215–217.
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- ^ "Type 23 Frigates" . Royal Navy website. Archived from the original on 31 May 2010.
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- ^ "Update to French Military Planning Law Means New Capabilities for Lafayette Class Frigates" . navyrecognition.com.
- ^ a b Mohammad Abdur Razzak (5 February 2021). "Myanmar navy's quick march" . Archived from the original on 5 February 2021. Retrieved 4 January 2021.
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- ^ SNA: Modified Littoral Combat Ships to be Designated Frigates Archived 6 August 2017 at the Wayback Machine – News.USNI.org, 15 January 2015
- ^ "Myanmar commissions first frigate with reduced RCS - IHS Jane's 360" . Janes.com. 1 April 2014. Retrieved 18 June 2014.
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- ^ https://www.defence24.com/industry/poland-signs-agreement-for-miecznik-frigates
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|Look up frigate in Wiktionary, the free dictionary.|
|Wikimedia Commons has media related to Frigates.|
- Frigates from battleships-cruisers.co.uk – history and pictures of United Kingdom frigates since World War II
- Frigates from Destroyers OnLine – pictures, history, crews of United States frigates since 1963
- The Development of the Full-Rigged Ship From the Carrack to the Full-Rigger
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