HMS Speedy (1918)

HMS Tobago was an S-class destroyer which served with the Royal Navy during the Greco-Turkish War. Launched by Thornycroft on 15 July 1918, the vessel followed a design typical of the yard by being faster than the majority of the class, and also had better seakeeping properties thanks to a raised forecastle. The destroyer operated as part of the Grand Fleet for the last few weeks of the First World War, and, after the Armistice, joined the Mediterranean Fleet based in Malta. While serving in off the coast of Turkey, the ship hit a mine on 15 July 1920, exactly two years after being launched. Despite the relative youth of the vessel, the damage was deemed irrepairable and so Tobago returned to Malta and was sold for scrap on 9 February 1922.

HMS Rosalind was an R-class destroyer which served with the Royal Navy. The ship was launched by Thornycroft on 14 October 1916 as the first of five similar ships ordered from the yard. The design was used as the basis for five subsequent ships of the S-class also built by the company. Rosalind served as part of the Grand Fleet during the First World War, operating as an escort to other warships and in anti-submarine patrols alongside other destroyers. The vessel was sold to be broken up on 13 July 1926.

Length overall is the maximum length of a vessel's hull measured parallel to the waterline. This length is important while docking the ship. It is the most commonly used way of expressing the size of a ship, and is also used for calculating the cost of a marina berth.

The beam of a ship is its width at its widest point. The maximum beam (BMAX) is the distance between planes passing through the outer extremities of the ship, beam of the hull (BH) only includes permanently fixed parts of the hull, and beam at waterline (BWL) is the maximum width where the hull intersects the surface of the water.

The draft or draught of a ship's hull is the vertical distance between the waterline and the bottom of the hull (keel). The draught of the vessel is the maximum depth of any part of the vessel, including appendages such as rudders, propellers and drop keels if deployed. Draft determines the minimum depth of water a ship or boat can safely navigate. The related term air draft is the maximum height of any part of the vessel above the water.

The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weight. Traditionally, various measurement rules have been in use, giving various measures in long tons. Today, tonnes are more commonly used.

John Brown and Company of Clydebank was a Scottish marine engineering and shipbuilding firm. It built many notable and world-famous ships including RMS Lusitania, RMS Aquitania, HMS Hood, HMS Repulse, RMS Queen Mary, RMS Queen Elizabeth and the Queen Elizabeth 2.

A funnel is the smokestack or chimney on a ship used to expel boiler steam and smoke or engine exhaust. They are also commonly referred to as stacks.

Fuel oil is any of various fractions obtained from the distillation of petroleum. Such oils include distillates and residues. Fuel oils include heavy fuel oil, marine fuel oil (MFO), bunker fuel, furnace oil (FO), gas oil (gasoil), heating oils, diesel fuel and others.

The forecastle is the upper deck of a sailing ship forward of the foremast, or, historically, the forward part of a ship with the sailors' living quarters. Related to the latter meaning is the phrase "before the mast" which denotes anything related to ordinary sailors, as opposed to a ship's officers.

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.

Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action". It includes surface based, subsurface, and air-based weapon systems, associated sensor systems, command and control arrangements, and passive measures. It may be used to protect naval, ground, and air forces in any location. However, for most countries, the main effort has tended to be homeland defence. NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence, as are initiatives to adapt air defence to the task of intercepting any projectile in flight.

Ceremonial ship launching involves the performance of ceremonies associated with the process of transferring a vessel to the water. It is a nautical tradition in many cultures, dating back thousands of years, to accompany the physical process with ceremonies which have been observed as public celebration and a solemn blessing, usually but not always, in association with the launch itself.

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.

HMS Blenheim was a Blake-class first class protected cruiser that served in the Royal Navy from 1890 to 1926. She was built by Thames Ironworks & Shipbuilding Company at Leamouth, London. The ship was named after the Battle of Blenheim.

HMS Iron Duke was a dreadnought battleship of the Royal Navy, the lead ship of her class, named in honour of Arthur Wellesley, 1st Duke of Wellington. She was built by Portsmouth Dockyard, and her keel laid in January 1912. Launched ten months later, she was commissioned into the Home Fleet in March 1914 as the fleet flagship. She was armed with a main battery of ten 13.5-inch (343 mm) guns and was capable of a top speed of 21.25 knots.

Constantinople became the de facto capital of the Roman Empire upon its founding in 330, and became the de jure capital in AD 476 after the fall of Ravenna and the Western Roman Empire. It remained the capital of the Eastern Roman Empire, the Latin Empire (1204–1261), and the Ottoman Empire (1453–1922). Following the Turkish War of Independence, the Turkish capital then moved to Ankara. Officially renamed Istanbul in 1930, the city is today the largest city and financial centre of the Republic of Turkey (1923–present). It is also the largest city in Europe.

The Black Sea is a marginal mediterranean sea of the Atlantic Ocean lying between Europe and Asia, east of the Balkans, south of the East European Plain, west of the Caucasus, and north of Anatolia. It is bounded by Bulgaria, Georgia, Romania, Russia, Turkey, and Ukraine. The Black Sea is supplied by major rivers, principally the Danube, Dnieper, and Don. Consequently, while six countries have a coastline on the sea, its drainage basin includes parts of 24 countries in Europe.

Mariupol is a city in Donetsk Oblast, Ukraine. Since May 2022, Mariupol has been occupied by Russian forces. It is situated on the northern coast (Pryazovia) of the Sea of Azov, at the mouth of the Kalmius River. Prior to the Russian invasion of Ukraine, it was the tenth-largest city in the country and the second-largest city in Donetsk Oblast, with an estimated population of 425,681 people in January 2022, however Ukrainian authorities estimate its current population to be approximately 100,000.

The Greco-Turkish War of 1919–1922 was fought between Greece and the Turkish National Movement during the partitioning of the Ottoman Empire in the aftermath of World War I, between May 1919 and October 1922.

The Gulf of Gemlik is an inlet of the Sea of Marmara in the Marmara region of Turkey. The gulf is located in the southwestern part of the sea. Mudanya, Gemlik and Armutlu are the major towns surrounding the gulf.

The Chanak Crisis, also called the Chanak Affair and the Chanak Incident, was a war scare in September 1922 between the United Kingdom and the Government of the Grand National Assembly in Turkey. Chanak refers to Çanakkale, a city on the Anatolian side of the Dardanelles Strait. The crisis was caused by Turkish efforts to push the Greek armies out of Turkey and restore Turkish rule in the Allied-occupied territories, primarily in Constantinople and Eastern Thrace. Turkish troops marched against British and French positions in the Dardanelles neutral zone. For a time, war between Britain and Turkey seemed possible, but Canada refused to agree as did France and Italy. British public opinion did not want a war. The British military did not either, and the top general on the scene, Sir Charles Harington, refused to relay an ultimatum to the Turks because he counted on a negotiated settlement. The Conservatives in Britain's coalition government refused to follow Liberal Prime Minister David Lloyd George, who with Winston Churchill was calling for war.

HMS Tourmaline was an S-class destroyer, which served with the Royal Navy during the Greco-Turkish War and the Russian Civil War. Tourmaline was one of three destroyers ordered from Thornycroft in June 1917 with more powerful geared turbines than the majority of the class as well as design changes that improved seakeeping. Launched on 19 April 1919, the vessel operated as part of the Fourth Destroyer Flotilla serving with the Atlantic and Mediterranean Fleets. After serving in the Black Sea and Sea of Marmara, during which sister ships Speedy and Tobago were lost, Tourmaline led the Gibraltar Local Defence Flotilla. The London Naval Treaty, signed 1930, required the retirement of some destroyers to meet the Royal Navy's tonnage requirement and Tourmaline was chosen for retirement. The destroyer was decommissioned on 28 November 1931 after 12 years of service and broken up.