A submarine is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely operated vehicles and robots, as well as medium-sized or smaller vessels, such as the midget submarine and the wet sub. Submarines are referred to as boats rather than ships irrespective of their size.
Q-ships, also known as Q-boats, decoy vessels, special service ships, or mystery ships, were heavily armed merchant ships with concealed weaponry, designed to lure submarines into making surface attacks. This gave Q-ships the chance to open fire and sink them. The use of Q-ships contributed to the abandonment of cruiser rules restricting attacks on unarmed merchant ships and to the shift to unrestricted submarine warfare in the 20th century.
A depth charge is an anti-submarine warfare (ASW) weapon designed to destroy submarines by detonating in the water around the target and subjecting it to a destructive hydraulic shock. Most depth charges use high explosives with a fuze set to detonate the charge, typically at a specific depth from the surface. Depth charges can be dropped by ships, patrol aircraft and helicopters.
CQD is one of the first distress signals adopted for radio use. On 7 January 1904 the Marconi International Marine Communication Company issued "Circular 57", which specified that, for the company's installations, beginning 1 February 1904 "the call to be given by ships in distress or in any way requiring assistance shall be 'C Q D' ".
The submarine film is a subgenre of war film in which the majority of the plot revolves around a submarine below the ocean's surface. Films of this subgenre typically focus on a small but determined crew of submariners battling against enemy submarines or submarine-hunter ships, or against other problems ranging from disputes amongst the crew, threats of mutiny, life-threatening mechanical breakdowns, or the daily difficulties of living on a submarine.
ARA San Luis (S-32) was a Type 209 diesel-powered submarine of the Argentine Navy. Built in Germany, San Luis has a displacement of 1,285 tonnes and was commissioned in 1974. The submarine operated against the Royal Navy during the Falklands War without any noticeable success, but survived a number of anti-submarine sweeps carried out by British frigates. San Luis was struck in 1997 after an incomplete overhaul.
Unrestricted submarine warfare is a type of naval warfare in which submarines sink merchant ships such as freighters and tankers without warning. The use of unrestricted submarine warfare has had significant impacts on international relations in regards to both the First World War and the Second World War. Its history has been dominated by German decision making. There have been attempts to limit the use of unrestricted naval warfare, with some dating back to before the turn of the 20th Century. Some of these have not succeed in outlawing this type of warfare. To be deemed acceptable, naval attacks needed to follow prize rules, which called for warships to search merchantmen and place crews in "a place of safety" before sinking them. To follow these rules a submarine must surface, defeating the purpose of submarines and putting itself in danger of attack.
AS-28 is a Priz-class deep-submergence rescue vehicle of the Russian Navy, which entered service in 1986. It was designed for submarine rescue operations by the Lazurit Design Bureau in Nizhny Novgorod. It is 13.5 m (44 ft) long, 5.7 m (19 ft) high, and can operate up to a depth of 1,000 m (3,300 ft).
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.
A wet sub is a type of underwater vehicle, either a submarine or a submersible, that does not provide a dry environment for its occupants. It is also described as an underwater vehicle where occupants are exposed to ambient environment during operations. The watercraft is classified as medium-sized or small vessel. This type of submarine differs from other underwater personal transport devices by the fact that it has a hull around it and it is not a "bare bones" design.
USCGC Ossipee (WPR-50) was a United States Coast Guard cutter of the Tallapoosa class constructed by Newport News Shipbuilding of Newport News, Virginia and commissioned 28 July 1915. Her hull was strengthened for light icebreaking operations. She was assigned a homeport of Portland, Maine after commissioning and cruised as far south as Cape Ann, Massachusetts serving in a law enforcement and search and rescue capacity. She saw service in both World War I and World War II.
MFV Bugaled Breizh is a French trawler from Loctudy, Finistère, whose sinking with all hands in 90 metres of water in the English Channel on 15 January 2004 remains unresolved. While it appeared possible that the ship was pulled under by a submarine, a specific submarine could not be identified from among the number of submarines of several nations operating in the general vicinity of the accident site. Moreover, the condition of the ship's recovered trawling equipment was reported by a technical inquiry to not be consistent with a submarine entanglement.
The Atlantic U-boat campaign of World War I was the prolonged naval conflict between German submarines and the Allied navies in Atlantic waters—the seas around the British Isles, the North Sea and the coast of France.
Danger! And Other Stories is a collection of short stories by Sir Arthur Conan Doyle published in 1918.
The convoy—a group of merchantmen or troopships traveling together with a naval escort—was revived during World War I (1914–18), after having been discarded at the start of the Age of Steam. Although convoys were used by the Royal Navy in 1914 to escort troopships from the Dominions, and in 1915 by both it and the French Navy to cover their own troop movements for overseas service, they were not systematically employed by any belligerent navy until 1916. The Royal Navy was the major user and developer of the modern convoy system, and regular transoceanic convoying began in June 1917. They made heavy use of aircraft for escorts, especially in coastal waters, an obvious departure from the convoy practices of the Age of Sail.
The RMS Lusitania was a British-registered ocean liner that was torpedoed by an Imperial German Navy U-boat during the First World War on 7 May 1915, about 11 nautical miles off the Old Head of Kinsale, Ireland. The attack took place in the declared maritime war-zone around the UK, shortly after unrestricted submarine warfare against the ships of the United Kingdom had been announced by Germany following the Allied powers' implementation of a naval blockade against it and the other Central Powers. The passengers had been warned before departing New York of the danger of voyaging into the area in a British ship.
"Cold War" is the eighth episode of the seventh series of the British science fiction television series Doctor Who. It first aired on BBC One on 13 April 2013, and was written by Mark Gatiss and directed by Douglas Mackinnon.
The following events occurred in November 1941:
An exchange on 24 May 1983 between Diana Gould, an English schoolteacher and former Women's Royal Naval Service meteorological officer, and British prime minister Margaret Thatcher was voted in 1999 as one of Britain's most memorable television spots. Appearing as a member of the public on BBC Nationwide's On the Spot live election special, Gould confronted Thatcher over the sinking of the Belgrano, an Argentine warship, during the 1982 Falklands War between the United Kingdom and Argentina.
