A corvette is a small warship. It is traditionally the smallest class of vessel considered to be a proper warship. The warship class above the corvette is that of the frigate, while the class below was historically that of the sloop-of-war.
The Swedish Navy is the naval branch of the Swedish Armed Forces. It is composed of surface and submarine naval units – the Fleet – as well as marine units, the Amphibious Corps.
The Visby class is a series of corvettes in use by the Swedish Navy. It is the latest class of corvette adopted by the navy after the Göteborg and Stockholm-class corvettes. Its design emphasizes low visibility radar cross-section and infrared signature, and the class has received widespread international attention because of its capabilities as a stealth ship. The first ship in the class is named after Visby, the main city on the island of Gotland.
An attack submarine or hunter-killer submarine is a submarine specifically designed for the purpose of attacking and sinking other submarines, surface combatants and merchant vessels. In the Soviet and Russian navies they were and are called "multi-purpose submarines". They are also used to protect friendly surface combatants and missile submarines. Some attack subs are also armed with cruise missiles, increasing the scope of their potential missions to include land targets.
A patrol boat is a relatively small naval vessel generally designed for coastal defence, border security, or law enforcement. There are many designs for patrol boats, and they generally range in size. They may be operated by a nation's navy, coast guard, police, or customs, and may be intended for marine, estuarine, or river environments.
Whiskey-class submarines are a class of diesel-electric attack submarines that the Soviet Union built in the early Cold War period.
The Royal Malaysian Navy is the naval arm of the Malaysian Armed Forces. RMN is the main agency responsible for the country's maritime surveillance and defense operations. RMN's area of operation consists of 603,210 square kilometers covering the country's coastal areas and Exclusive Economic Zones (EEZ). RMN also bears the responsibility of controlling the country's main Sea Lines of Communications (SLOC) such as the Straits of Malacca and the Straits of Singapore and also monitors national interests in areas with overlapping claims such as in Spratly.
The Libyan Navy is the naval warfare branch of the Libyan Armed Forces. Established in November 1962, Libyan Navy has been headed by Admiral Mansour Bader, Chief of Staff of the Libyan Naval Force. Before the First Libyan Civil War it was a fairly typical small navy with a few missile frigates, corvettes and patrol boats to defend the coastline, but with a very limited self-defence capability.
The Republic of China Navy, also called the ROC Navy and retroactively as the Chinese Navy but colloquially as the Taiwanese Navy, is the maritime branch of the Republic of China Armed Forces (ROCAF).
HSwMS Gotland (Gtd) is a defense submarine of the Swedish Navy. It was the first ship of the Gotland-class, which was the first operational submarine class in the world to use air-independent propulsion in the form of Stirling engines which use liquid oxygen and diesel as the propellant.
The Udaloy class, Soviet designation Project 1155 Fregat and Russian designation Project 11551 Fregat-M, are series of anti-submarine guided-missile destroyers built for the Soviet Navy, seven of which are currently in service with the Russian Navy. Twelve ships were built between 1980 and 1990, while the thirteenth ship built to a modified design, known as Udaloy II class, followed in 1999. They complement the Sovremenny-class destroyers in anti-aircraft and anti-surface warfare operations. The codename Udaloy comes from an archaic Russian adjective удалой, meaning daring or bold.
Anti-submarine warfare is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms, to find, track, and deter, damage, or destroy enemy submarines. Such operations are typically carried out to protect friendly shipping and coastal facilities from submarine attacks and to overcome blockades.
The Type 037 corvette is a series 400–500 ton corvette type classes in service with the People's Liberation Army Navy. Unlike western navies, the People's Liberation Army Navy does not have dedicated patrol boats in its inventory. Instead, a large variety of corvette type classes, in the form of missile boats and submarine chasers fulfill the tasks of patrolling China's territorial waters. The Egyptian Navy operates eight vessels.
The Göteborg class is a class of corvettes in the Swedish Navy, built between 1986 and 1993. The class was originally designed to destroy Soviet submarines and surface vessels, and is armed with eight RBS-15 anti-ship missiles, torpedoes, one 57 mm cannon, and one 40 mm cannon.
The Stockholm class is a pair of warships of the Swedish Navy. Built as corvettes in Karlskrona 1984–1985, they are armed with four RBS15 anti-ship missiles, one 57 mm cannon and several machine guns. In 2017 the two units in the class were rebuilt and are now serving as patrol boats. The option to carry anti-ship missiles does however remain.
The Stenka class is the NATO reporting name for a class of patrol boats built for the Soviet Navy and Soviet Allies. The Soviet designation was Project 205P Tarantul. The boats are an anti-submarine (ASW) patrol boat version of the Osa-class missile boat.
The Pacific Fleet is the Russian Navy fleet in the Pacific Ocean.
HSwMS Västergötland (Vgd) was the lead ship of the Västergötland-class submarines, named after Västergötland, Sweden. The submarine was launched on 19 July 1986 and entered service with the Swedish Navy on 20 October 1988. Västergötland served with the Swedish Navy until 1997 when the submarine was decommissioned. In 2005 Västergötland and sister boat HSwMS Hälsingland were sold to Singapore, where Västergötland was renamed RSS Swordsman and entered service on 30 April 2013.
HSwMS Hälsingland (Hgd), was the second submarine of the Västergötland class. The vessel was named after Hälsingland, Sweden. The submarine was launched on 31 August 1987 and entered service with the Swedish Navy on 20 October 1988. Hälsingland served with the Swedish Navy until 1997 when the submarine was decommissioned. In 2005 Hälsingland and sister boat HSwMS Västergötland were sold to Singapore, where Hälsingland was renamed RSS Archer and entered service on 2 December 2011. Archer remains in service.
Swedish Navy 
