HMS Ambuscade (D38)

Length between perpendiculars is the length of a ship along the summer load line from the forward surface of the stem, or main bow perpendicular member, to the after surface of the sternpost, or main stern perpendicular member. When there is no sternpost, the centerline axis of the rudder stock is used as the aft end of the length between perpendiculars.

John I. Thornycroft & Company Limited, usually known simply as Thornycroft was a British shipbuilding firm founded by John Isaac Thornycroft in Chiswick in 1866. It moved to Woolston, Southampton, in 1908, merging in 1966 with Vosper & Company to form one organisation called Vosper Thornycroft. From 2002 to 2010 the company acquired several international and US based defence and services companies, and changed name to the VT Group. In 2008 VT's UK shipbuilding and support operations were merged with those of BAE Systems to create BVT Surface Fleet. In 2010 remaining parts of the company were absorbed by Babcock International who retained the UK and international operations, but sold the US based operations to the American Jordan Company, who took the name VT Group.

HMS Amazon was a prototype design of destroyer ordered for the Royal Navy in 1924. She was designed and built by Thornycroft in response to an admiralty request for a new design of destroyer incorporating the lessons and technological advances of the First World War. Their great rivals Yarrow produced a similar, competitive design — that of Ambuscade.

A steam turbine is a machine that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Charles Parsons in 1884. Fabrication of a modern steam turbine involves advanced metalwork to form high-grade steel alloys into precision parts using technologies that first became available in the 20th century; continued advances in durability and efficiency of steam turbines remains central to the energy economics of the 21st century.

The 2-pounder gun, officially the QF 2-pounder and universally known as the pom-pom, was a 40 mm (1.6 in) British autocannon, used as an anti-aircraft gun by the Royal Navy. The name came from the sound that the original models make when firing. This QF 2-pounder was not the same gun as the Ordnance QF 2-pounder, used by the British Army as an anti-tank gun and a tank gun, although they both fired 2 lb (0.91 kg), 40 mm (1.6 in) projectiles.

The Lewis gun is a First World War–era light machine gun. Designed privately in the United States though not adopted there, the design was finalised and mass-produced in the United Kingdom, and widely used by troops of the British Empire during the war. It had a distinctive barrel cooling shroud and top-mounted pan magazine. The Lewis served to the end of the Korean War, and was widely used as an aircraft machine gun during both World Wars, almost always with the cooling shroud removed, as air flow during flight offered sufficient cooling.

The Oerlikon 20 mm cannon is a series of autocannons, based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II. Many versions of the cannon are still used today.

Radar is a radiolocation system that uses radio waves to determine the distance (ranging), angle (azimuth), and radial velocity of objects relative to the site. It is used to detect and track aircraft, ships, spacecraft, guided missiles, and motor vehicles, and map weather formations, and terrain. A radar system consists of a transmitter producing electromagnetic waves in the radio or microwaves domain, a transmitting antenna, a receiving antenna and a receiver and processor to determine properties of the objects. Radio waves from the transmitter reflect off the objects and return to the receiver, giving information about the objects' locations and speeds.

The Hedgehog was a forward-throwing anti-submarine weapon that was used primarily during the Second World War. The device, which was developed by the Royal Navy, fired up to 24 spigot mortars ahead of a ship when attacking a U-boat. It was deployed on convoy escort warships such as destroyers and corvettes to supplement the depth charges.

A depth charge is an anti-submarine warfare (ASW) weapon. It is intended to destroy a submarine by being dropped into the water nearby and detonating, subjecting the target to a powerful and destructive hydraulic shock. Most depth charges use high explosive charges and a fuze set to detonate the charge, typically at a specific depth. Depth charges can be dropped by ships, patrol aircraft, and helicopters.

Squid was a British World War II ship-mounted anti-submarine weapon. It consisted of a three-barrelled mortar which launched depth charges. It replaced the Hedgehog system, and was in turn replaced by the Limbo system.

The Atlantic Fleet was a naval fleet of the Royal Navy. It existed for two separate periods; 1909 until 1914, and then 1919 until 1932.

Chatham Dockyard was a Royal Navy Dockyard located on the River Medway in Kent. Established in Chatham in the mid-16th century, the dockyard subsequently expanded into neighbouring Gillingham.

The British Mediterranean Fleet, also known as the Mediterranean Station, was a formation of the Royal Navy. The Fleet was one of the most prestigious commands in the navy for the majority of its history, defending the vital sea link between the United Kingdom and the majority of the British Empire in the Eastern Hemisphere. The first Commander-in-Chief for the Mediterranean Fleet was the appointment of General at Sea Robert Blake in September 1654. The Fleet was in existence until 1967.

Malta Dockyard was an important naval base in the Grand Harbour in Malta in the Mediterranean Sea. The infrastructure which is still in operation is now exploited by Palumbo Shipyards.

The Home Fleet was a fleet of the Royal Navy that operated from the United Kingdom's territorial waters from 1902 with intervals until 1967. In 1967, it was merged with the Mediterranean Fleet creating the new Western Fleet.

HMS Vernon was a shore establishment or "stone frigate" of the Royal Navy in Portsmouth. Vernon was established on 26 April 1876 as the Royal Navy's Torpedo Branch also known as the Torpedo School, named after the ship HMS Vernon which served as part of its floating base. After the First World War, HMS Vernon moved ashore, taking over the Gunwharf site, where it continued to operate until 1 April 1996, when the various elements comprising the establishment were split up and moved to different commands.

His Majesty's Naval Base, Portsmouth is one of three operating bases in the United Kingdom for the Royal Navy. Portsmouth Naval Base is part of the city of Portsmouth; it is located on the eastern shore of Portsmouth Harbour, north of the Solent and the Isle of Wight. Until the early 1970s, it was officially known as Portsmouth Royal Dockyard ; thereafter the term 'Naval Base' gained currency, acknowledging a greater focus on personnel and support elements alongside the traditional emphasis on building, repairing and maintaining ships. In 1984 Portsmouth's Royal Dockyard function was downgraded and it was formally renamed the 'Fleet Maintenance and Repair Organisation' (FMRO). The FMRO was privatized in 1998, and for a time, shipbuilding, in the form of block construction, returned. Around 2000, the designation HMS Nelson was extended to cover the entire base.

Harwich Dockyard was a Royal Navy Dockyard at Harwich in Essex, active in the 17th and early 18th century. Owing to its position on the East Coast of England, the yard was of strategic importance during the Anglo-Dutch Wars; however, due to a lack of deep-water access and the difficulty of setting off from Harwich against an easterly wind, its usefulness was somewhat limited and its facilities remained small-scale compared to the other Royal Dockyards over the same period. Nonetheless, it remained actively involved in repairing and refitting the nation's warships, as well as building them: of the eighty ships built for the Royal Navy in Britain between 1660 and 1688, fourteen were built at Harwich Dockyard..

The 51st (Highland) Division was an infantry division of the British Army that fought on the Western Front in France during the First World War from 1915 to 1918. The division was raised in 1908, upon the creation of the Territorial Force, as the Highland Division and later 51st (Highland) Division from 1915. The division's insignia was a stylised 'HD' inside a red circle. Early doubts about the division's performance earned it the nickname of "Harper's Duds" after the name of its commander, Major-General George Harper.

HMS Boadicea was a B-class destroyer built for the Royal Navy (RN) around 1930. Initially assigned to the Mediterranean Fleet, she was transferred to the Home Fleet in 1936. Before her departure, the ship evacuated civilians from Spain during the beginning of the Spanish Civil War of 1936–1939. Boadicea later spent considerable time in Spanish waters, enforcing the arms blockade imposed by Britain and France on both sides of the conflict. During World War II, the ship spent the bulk of the war on convoy escort duty in British waters and participated in the Battle of the Atlantic, Operation Torch, the Russian Convoys, and in the Normandy landings. Badly damaged by German dive bombers in 1940, she was sunk almost exactly four years later by German aircraft.

Greenock is a town and administrative centre in the Inverclyde council area in Scotland, United Kingdom and a former burgh within the historic county of Renfrewshire, located in the west central Lowlands of Scotland. It forms part of a contiguous urban area with Gourock to the west and Port Glasgow to the east.

In systems involving heat transfer, a condenser is a heat exchanger used to condense a gaseous substance into a liquid state through cooling. In so doing, the latent heat is released by the substance and transferred to the surrounding environment. Condensers are used for efficient heat rejection in many industrial systems. Condensers can be made according to numerous designs, and come in many sizes ranging from rather small (hand-held) to very large. For example, a refrigerator uses a condenser to get rid of heat extracted from the interior of the unit to the outside air.

The Douro class destroyers consisted of five ships used by the Portuguese Navy and two used by the Colombian Navy, all built during the 1930s. Note, that, in Portugal, this class of destroyers is usually referred to as the Vouga class, with the term Douro class being usually employed to designate the previous class of Portuguese destroyers also known as Guadiana class.

In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy, or battle group and defend them against powerful short-range attackers. They were originally developed in 1885 by Fernando Villaamil for the Spanish Navy as a defense against torpedo boats, and by the time of the Russo-Japanese War in 1904, these "torpedo boat destroyers" (TBDs) were "large, swift, and powerfully armed torpedo boats designed to destroy other torpedo boats". Although the term "destroyer" had been used interchangeably with "TBD" and "torpedo boat destroyer" by navies since 1892, the term "torpedo boat destroyer" had been generally shortened to simply "destroyer" by nearly all navies by the First World War.

The Portuguese Navy is the naval branch of the Portuguese Armed Forces which, in cooperation and integrated with the other branches of the Portuguese military, is charged with the military defense of Portugal.

Navio da República Portuguesa, abbreviated as N.R.P. or NRP, is a ship prefix used to identify a commissioned ship of the Portuguese Navy.

The Colombian Navy, officially the Colombian National Navy, also known as the "Armada Nacional" or just the "Armada" in Spanish, is the naval branch of the military forces of Colombia. The Navy is responsible for security and defence in the Colombian zones of both the Atlantic (Caribbean) and Pacific oceans, the extensive network of rivers inside the country, and a few small land areas under its direct jurisdiction.

The Antioquia class of destroyers consisted of two ships, ARC Antioquia and ARC Caldas, used by the navy of Colombia, the Armada Nacional República de Colombia, between 1934 and 1961. Initially constructed at the Lisbon Naval Arsenal as part of the Portuguese Navy's Douro class, they were acquired by Colombia before completion in response to the Peruvian purchase of two destroyers during the war with Peru. They arrived too late to see service in the conflict and saw little action during their service lives. They underwent a major refit in the mid-1950s which saw their armament completely redone. Following their removal from service in 1961, they were broken up for scrap.

Clydebank is a town in West Dunbartonshire, Scotland. Situated on the north bank of the River Clyde, it borders the village of Old Kilpatrick to the west, and the Yoker and Drumchapel areas of the adjacent City of Glasgow immediately to the east. Depending on the definition of the town's boundaries, the suburban areas of Duntocher, Faifley and Hardgate either surround Clydebank to the north, or are its northern outskirts, with the Kilpatrick Hills beyond.

Scotland is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a 96-mile (154-kilometre) border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the north and west, the North Sea to the northeast and east, and the Irish Sea to the south. It also contains more than 790 islands, principally in the archipelagos of the Hebrides and the Northern Isles. Most of the population, including the capital Edinburgh, is concentrated in the Central Belt—the plain between the Scottish Highlands and the Southern Uplands—in the Scottish Lowlands.