Ceremonial ship launching in the context of "HMS Alert (1856)"

INS Vikrant is an aircraft carrier in service with the Indian Navy. The carrier is India's fourth carrier and the first to be built domestically. It was constructed by the Cochin Shipyard Limited (CSL). The name Vikrant is a tribute to India's first aircraft carrier INS Vikrant (1961). Vikrant means "courageous" in Sanskrit. The motto of the ship, "जयेम सम् युधिस्पृधः" (Sanskrit), means "I defeat those who dare to challenge me" (English). It is currently one of two active aircraft carriers in the Indian Navy, the other being the flagship INS Vikramaditya.

Work on the ship's design began in 1999. The keel was laid in 2009. The carrier was floated out of dry dock in December 2011 and launched in August 2013. Basin trials were completed in December 2020, and sea trials started in August 2021. Its commissioning ceremony was held on 2 September 2022. Aircraft flight trials have been completed in 2023. The total cost of the project is approximately ₹23,000 crore (equivalent to ₹260 billion or US$3.1 billion in 2023) at the time of first sea trials.

A battleship is a large, heavily armored warship with a main battery consisting of large guns, designed to serve as a capital ship. From their advent in the late 1880s, battleships were among the largest and most formidable warship types ever built, until they were surpassed by aircraft carriers beginning in the 1940s. The modern battleship traces its origin to the sailing ship of the line, which was developed into the steam ship of the line and soon thereafter the ironclad warship. After a period of extensive experimentation in the 1870s and 1880s, ironclad design was largely standardized by the British Royal Sovereign class, which are usually referred to as the first "pre-dreadnought battleships". These ships carried an armament that usually included four large guns and several medium-caliber guns that were to be used against enemy battleships, and numerous small guns for self-defense.

Naval powers around the world built dozens of pre-dreadnoughts in the 1890s and early 1900s, though they saw relatively little combat; only two major wars were fought during the period that included pre-dreadnought battles: the Spanish–American War in 1898 and the Russo-Japanese War of 1904–1905. The following year, the British launched the revolutionary all-big-gun battleship HMS Dreadnought. This ship discarded the medium-caliber guns in exchange for a uniform armament of ten large guns. All other major navies quickly began (or had already started) "dreadnoughts" of their own, leading to a major naval arms race. During World War I, only one major fleet engagement took place: the Battle of Jutland in 1916, but neither side was able to achieve a decisive result.

HMS Sheffield was the third of ten Town-class light cruisers of the Royal Navy. The ship was laid down in January 1935, launched in July 1936, and commissioned in August 1937. She was active in all major naval European theatres of the Second World War, in the Atlantic Ocean, the Mediterranean Sea and the Arctic Ocean.

Her career started with service in the Home Fleet, which took her on patrols against German blockade runners and on actions during the Norwegian Campaign. In August 1940, Sheffield was transferred to Force H stationed in Gibraltar. During her service with Force H, most of the operations involved either ferrying aircraft or escorting convoys to Malta. Sheffield also operated against German surface raiders in the Atlantic, and took part in the chase for the German battleship Bismarck. On 26 May 1941, she directed torpedo bombers from the aircraft carrier Ark Royal to Bismarck, but took no part in the sinking of Bismarck one day later.

Marella Voyager (formerly MV Mercury, Celebrity Mercury, Mein Schiff 2 and Mein Schiff Herz) is the second of two Century-class cruise ships operated by TUI Cruises. Built for Celebrity Cruises at the Meyer Werft shipyard in Papenburg, Germany, she was launched on 11 July 1997, and was christened and entered service as MV Mercury on 27 October 1997.

In 2008, after some eleven years in operation as Mercury, she was renamed Celebrity Mercury. In 2011, she was transferred to the fleet of TUI Cruises, a joint venture between TUI AG and Celebrity Cruises' owner Royal Caribbean Cruises Ltd. At the same time, she was renamed Mein Schiff 2.

Océan was a 118-gun first-rate three-decker ship of the line of the French Navy, lead ship of her class. She was funded by a don des vaisseaux donation from the Estates of Bourgogne.

She was ordered as États de Bourgogne and was launched at Brest in 1790. Like many French ships of the line during the Revolutionary period, she was renamed several times, becoming Côte d'Or in January 1793, Montagne in October 1793, Peuple on 17 May 1795, and a matter of weeks later again renamed, to Océan. She served until 1855.

INS Deepak is a Deepak-class fleet tanker built by Fincantieri. Deepak was launched on 13 February 2010 and commissioned on 21 January 2011.

Bismarck was the first of two Bismarck-class battleships built for Nazi Germany's Kriegsmarine. Named after Chancellor Otto von Bismarck, the ship was laid down at the Blohm & Voss shipyard in Hamburg in July 1936 and launched in February 1939. Work was completed in August 1940, when she was commissioned into the German fleet. Bismarck and her sister ship Tirpitz were the largest battleships ever built by Germany, and two of the largest built by any European power.

In the course of the warship's eight-month career, Bismarck conducted only one offensive operation that lasted eight days in May 1941, codenamed Rheinübung. The ship, along with the heavy cruiser Prinz Eugen, was to break into the Atlantic Ocean and raid Allied shipping from North America to Great Britain. The two ships were detected several times off Scandinavia, and British naval units were deployed to block their route. At the Battle of the Denmark Strait, the battlecruiser HMS Hood initially engaged Prinz Eugen, probably by mistake, while HMS Prince of Wales engaged Bismarck. In the ensuing battle Hood was destroyed by the combined fire of Bismarck and Prinz Eugen, which then damaged Prince of Wales and forced her retreat. Bismarck suffered sufficient damage from three hits by Prince of Wales to force an end to the raiding mission.

USS Concord (Gunboat No. 3/PG-3) was a member of the Yorktown class of steel-hulled, twin-screw gunboats in the United States Navy in the late 19th and early 20th centuries. She was the second U.S. Navy ship named in honor of the town of Concord, Massachusetts, site of the Battle of Concord in the American Revolutionary War.

The contract to build Concord was awarded to N. F. Palmer & Co. of Philadelphia in the 1888 fiscal year. Her hull was subcontracted to the Delaware River Iron Shipbuilding & Engine Works which laid down her keel in May 1888. Concord was launched in March 1890. She was just over 244 feet (74 m) long and 36 feet (11 m) abeam and displaced 1,710 long tons (1,740 t). She was equipped with two steam engines which were supplemented with three schooner-rigged masts. The ship had a main battery of six 6-inch (15.2 cm) guns, and several smaller caliber guns.

USNS Mercy (T-AH-19) is the lead ship of her class of hospital ships in non-commissioned service with the United States Navy. Her sister ship is USNS Comfort (T-AH-20). She is the third US Navy ship to be named after the virtue mercy. In accordance with the Geneva Conventions, Mercy and her crew do not carry any offensive weapons, though defensive weapons are available.

United States Naval Ship (USNS) Mercy was built as a San Clemente-class oil tanker, SS Worth, by National Steel and Shipbuilding Company, San Diego, California, in 1976. Starting in July 1984, she was renamed and converted to a hospital ship by the same company. Launched on 20 July 1985, Mercy was placed in service on 8 November 1986. She has a raised forecastle, a transom stern, a bulbous bow, an extended deckhouse with a forward bridge, and a helicopter-landing deck with a flight-control facility.