HMAS Huon (D50)

The River class was a class of six torpedo-boat destroyers operated by the Royal Australian Navy (RAN). The design was based on a modified version of the British River-class destroyer, 13 of which were planned under the 1904 Naval Estimates, but were cancelled before orders were placed. The first batch of three ships was ordered for the Commonwealth Naval Forces in 1909, followed later by a second batch of three a few years later. All six vessels are named after Australian rivers.

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 QF 12-pounder 12-cwt gun (Quick-Firing) was a common, versatile 3-inch (76.2 mm) calibre naval gun introduced in 1894 and used until the middle of the 20th century. It was produced by Armstrong Whitworth, Elswick and used on Royal Navy warships, exported to allied countries, and used for land service. In British service "12-pounder" was the rounded value of the projectile weight, and "12 cwt (hundredweight)" was the weight of the barrel and breech, to differentiate it from other "12-pounder" guns.

The .303 British or 7.7×56mmR, is a .303-inch (7.7 mm) calibre rimmed rifle cartridge. The .303 inch bore diameter is measured between rifling lands as is the common practice in Europe which follows the traditional black powder convention.

The Maxim gun is a recoil-operated machine gun invented in 1884 by Hiram Stevens Maxim. It was the first fully automatic machine gun in the world.

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 offers sufficient cooling.

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.

The Cockatoo Island Dockyard was a major dockyard in Sydney, Australia, based on Cockatoo Island. The dockyard was established in 1857 to maintain Royal Navy warships. It later built and repaired military and battle ships, and played a key role in sustaining the Royal Australian Navy. The dockyard was closed in 1991, and its remnants are heritage listed as the Cockatoo Island Industrial Conservation Area.

Jens August Jensen was an Australian politician who served in the House of Representatives from 1910 to 1919. He was a minister in the governments of Andrew Fisher and Billy Hughes, serving as Minister for the Navy from 1915 to 1917 and Minister for Trade and Customs from 1917 to 1918.

The River Derwent is a river located in Tasmania, Australia. It is also known by the palawa kani name timtumili minanya. The river rises in the state's Central Highlands at Lake St Clair, and descends more than 700 metres (2,300 ft) over a distance of more than 200 kilometres (120 mi), flowing through Hobart, the state's capital city, before emptying into Storm Bay and flowing into the Tasman Sea. The banks of the Derwent were once covered by forests and occupied by Aboriginal Tasmanians. European settlers farmed the area and during the 20th century many dams were built on its tributaries for the generation of hydro-electricity.

HMS Derwent was a Hawthorn Leslie-type River-class destroyer ordered by the Royal Navy under the 1901 – 1902 Naval Estimates. Named after the River Derwent in central England, she was the second ship to carry this name.

Sandakan formerly known at various times as Elopura, is the capital of the Sandakan District in Sabah, Malaysia. It is the second largest city in Sabah after Kota Kinabalu. It is located on the Sandakan Peninsula and east coast of the state in the administrative centre of Sandakan Division and was the former capital of British North Borneo. In 2010, the city had an estimated population of 157,330 while the overall municipal area had a total population of 396,290. The population of the municipal area had increased to 439,050 by the 2020 Census.

Diego Garcia is an island of the British Indian Ocean Territory, an overseas territory of the United Kingdom. It is a militarised atoll just south of the equator in the central Indian Ocean, and the largest of the 60 small islands of the Chagos Archipelago. The Portuguese were the first Europeans to find it and it was then settled by the French in the 1790s and transferred to British rule after the Napoleonic Wars. It was one of the "Dependencies" of the British Colony of Mauritius until the Chagos Islands were detached for inclusion in the newly created British Indian Ocean Territory (BIOT) in 1965.

Port Said is a city that lies in northeast Egypt extending about 30 km (19 mi) along the coast of the Mediterranean Sea, north of the Suez Canal. With an approximate population of 603,787 (2010), it is the fifth-largest city in Egypt. The city was established in 1859 during the building of the Suez Canal.

Malta, officially the Republic of Malta, is an island country in the Mediterranean Sea. It consists of an archipelago, between Italy and Libya, and is part of Southern Europe. It lies 80 km (50 mi) south of Sicily (Italy), 284 km (176 mi) east of Tunisia, and 333 km (207 mi) north of Libya. The official languages are Maltese and English, and 66% of the current Maltese population is at least conversational in the Italian language.

The Adriatic Sea is a body of water separating the Italian Peninsula from the Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto to the northwest and the Po Valley. The countries with coasts on the Adriatic are Albania, Bosnia and Herzegovina, Croatia, Italy, Montenegro, and Slovenia.

Brindisi is a city in the region of Apulia in southern Italy, the capital of the province of Brindisi, on the coast of the Adriatic Sea. Historically, the city has played an important role in trade and culture, due to its strategic position on the Italian Peninsula and its natural port on the Adriatic Sea. The city remains a major port for trade with Greece and the Middle East. Its industries include agriculture, chemical works, and the generation of electricity.

HMAS Yarra, named for the Yarra River, was a River-class torpedo-boat destroyer of the Royal Australian Navy (RAN). Ordered in 1909 for the Commonwealth Naval Forces, Yarra was temporarily commissioned into the Royal Navy on completion in 1910 and handed over to Australian control on arrival in Australia.

Genoa is a city in and the capital of the Italian region of Liguria, and the sixth-largest city in Italy. In 2015, 594,733 people lived within the city's administrative limits. As of the 2011 Italian census, the Province of Genoa, which in 2015 became the Metropolitan City of Genoa, had 855,834 resident persons. Over 1.5 million people live in the wider metropolitan area stretching along the Italian Riviera.

Portsmouth is a port and city in the ceremonial county of Hampshire in southern England. The city of Portsmouth has been a unitary authority since 1 April 1997 and is administered by Portsmouth City Council.

HMAS Melbourne was a Town class light cruiser operated by the Royal Australian Navy (RAN). The ship was laid down by Cammell Laird at Birkenhead in England in 1911, launched in 1912 and commissioned in 1913. At the start of World War I, Melbourne was involved in attempts to locate the German East Asia Squadron, and participated in the capture of German colonies in the Pacific, before being assigned to the North America and West Indies Stations. In 1916, the cruiser joined the Grand Fleet in the North Sea, where she remained for the remainder of the war. Melbourne spent late 1919 and early 1920 in reserve, then was flagship of the Royal Australian Navy from 1920 until 1928, except for a second period in reserve during 1924 and 1925. HMAS Melbourne paid off in the United Kingdom on 23 April 1928, and was scrapped in 1929.

A battle honour is an award of a right by a government or sovereign to a military unit to emblazon the name of a battle or operation on its flags ("colours"), uniforms or other accessories where ornamentation is possible.

HMS Renown was the lead ship of her class of battlecruisers of the Royal Navy built during the First World War. She was originally laid down as an improved version of the Revenge-class battleships. Her construction was suspended on the outbreak of war on the grounds she would not be ready in a timely manner. Admiral Lord Fisher, upon becoming First Sea Lord, gained approval to restart her construction as a battlecruiser that could be built and enter service quickly. The Director of Naval Construction (DNC), Eustace Tennyson-D'Eyncourt, quickly produced an entirely new design to meet Admiral Lord Fisher's requirements and the builders agreed to deliver the ships in 15 months. They did not quite meet that ambitious goal, but the ship was delivered a few months after the Battle of Jutland in 1916. Renown, and her sister HMS Repulse, were the world's fastest capital ships upon completion.

A target ship is a vessel — typically an obsolete or captured warship — used as a seaborne target for naval gunnery practice or for weapons testing. Targets may be used with the intention of testing effectiveness of specific types of ammunition; or the target ship may be used for an extended period of routine target practice with specialized non-explosive ammunition. The potential consequences of a drifting wreck require careful preparation of the target ship to prevent pollution, or a floating or submerged collision risk for maritime navigation.

HMAS Australia (I84/D84/C01) was a County-class heavy cruiser of the Royal Australian Navy (RAN). One of two Kent-subclass ships ordered for the RAN in 1924, Australia was laid down in Scotland in 1925, and entered service in 1928. Apart from an exchange deployment to the Mediterranean from 1934 to 1936, during which she became involved in the planned British response to the Abyssinia Crisis, Australia operated in local and South-West Pacific waters until World War II began.

HMAS Canberra (I33/D33), named after the Australian capital city of Canberra, was a Royal Australian Navy (RAN) heavy cruiser of the Kent sub-class of County-class cruisers. Constructed in Scotland during the mid-1920s, the ship was commissioned in 1928, and spent the first part of her career primarily operating in Australian waters, with some deployments to the China Station.

HMAS Albatross was a seaplane tender of the Royal Australian Navy (RAN), which was later transferred to the Royal Navy and used as a repair ship. Albatross was built by Cockatoo Island Dockyard during the mid-1920s and entered service at the start of 1929. The ship experienced problems with the aircraft assigned to her during her career: the amphibious aircraft she had been designed for were retired just before the ship entered service, the replacement aircraft could not be catapult-launched from the ship, and a new plane designed specifically to work with the ship began operations after Albatross was demoted from seagoing status in 1933.

The Australian War Memorial is Australia's national memorial to the members of its armed forces and supporting organisations who have died or participated in wars involving the Commonwealth of Australia and some conflicts involving personnel from the Australian colonies prior to Federation. Opened in 1941, the memorial includes an extensive national military museum.