(Askeri) FIRKATEYN: Denizaltı, hava ve su üstü tehditlerine karşı tek başına veya vurucu kuvvet, denizaltı savunma harbi veya amfibi kuvvetlerle birlikte harekata katılan bir harp gemisi (Normal silahları, 3-5 inchlik çift maksatlı toplar ve gelişmiş denizaltısavar savaş silahlarıdır). FF olarak adlandırılır. Ayrıca bakınız: "guided missile frigate"
A frigate is a fairly small ship owned by the navy that can move at fast speeds. Frigates are often used to protect other ships. a small fast ship used especially for protecting other ships in wars (frégate, from fregata). Either of two different types of warships, of the 17th-19th centuries and of World War II and after. The sailing ship known as a frigate was a three-masted, fully rigged vessel, often carrying 30-40 guns in all. Smaller and faster than ships of the line, frigates served as scouts or as escorts protecting merchant convoys; they also cruised the seas as merchant raiders themselves. With the transition to steam, the term gradually gave way to cruiser. In World War II, Britain revived the term frigate to describe escort ships equipped with sonar and depth charges and used to guard convoys from submarines. In the postwar decades frigates also adopted an antiaircraft role, adding radar and surface-to-air missiles. Modern frigates may displace more than 3,000 tons (2,700 metric tons), sail at a speed of 30 knots, and carry a crew of 200
After the application of steam to navigation steam frigates of largely increased size and power were built, and formed the main part of the navies of the world till about 1870, when the introduction of ironclads superseded them
The French, about 1650, transferred the name to larger vessels, and by 1750 it had been appropriated for a class of war vessels intermediate between corvettes and ships of the line
A 19th c. type of warship combining sail and steam propulsion, typically of ironclad timber construction, supplementing and superseding sailing ships of the battle line until made obsolete by the development of the solely steam propelled iron battleship