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The list of ship commissionings in 1957 includes a chronological list of all ships decommissioned in 1957.
| Operator | Ship | Class and type | Pennant | Other notes | |
|---|---|---|---|---|---|
| 17 January |  Royal Canadian Navy | Bonaventure | Majestic-class aircraft carrier | CVL 22 | Former HMS Powerful |
| 10 August |  United States Navy | Ranger | Forrestal-class aircraft carrier | CVA-61 | [1] |
The Gato class of submarines were built for the United States Navy and launched in 1941–1943. Named after the lead ship of the class, USS Gato, they were the first mass-production U.S. submarine class of World War II.
An attack submarine or hunter-killer submarine is a submarine specifically designed for the purpose of attacking and sinking other submarines, surface combatants and merchant vessels. In the Soviet and Russian navies they were and are called "multi-purpose submarines". They are also used to protect friendly surface combatants and missile submarines. Some attack subs are also armed with cruise missiles, increasing the scope of their potential missions to include land targets.
The second USS Norfolk (DL-1) was the first destroyer leader of the United States Navy. Originally projected as a hunter-killer cruiser, she was in service until 1970, and was scrapped in 1974.
The Illustrious class was a class of aircraft carrier of the Royal Navy that included some of the most important British warships in the Second World War. They were laid down in the late 1930s as part of the rearmament of British forces in response to the emerging threats of Nazi Germany, Fascist Italy and Imperial Japan.
HMS Lynx (F27), was a Leopard-class Type 41 anti aircraft frigate of the Royal Navy, named after the lynx.
The Barracuda-class submarines were the product of Project Kayo, a research and development effort begun immediately after World War II by the United States Navy to "solve the problem of using submarines to attack and destroy enemy submarines." They originally had the hull classification symbol SSK, for "hunter-killer submarine".
The Oregon City class was a class of heavy cruisers of the United States Navy. Although ten ships of this class were planned, only four were completed – one of those as a command ship. The three ships completed as cruisers were in commission from 1946 to 1980, one having been converted to a guided missile cruiser (CG).
The Gleaves-class destroyers were a class of 66 destroyers of the United States Navy built 1938–42, designed by Gibbs & Cox. The first ship of the class was USS Gleaves. They were the destroyer type that was in production for the US Navy when the United States entered World War II.
The Soviet Navy's Project 611 were one of the first Soviet post-Second-World-War attack submarines. They were similarly capable to the American GUPPY fleet-boat conversions. They were a contemporary of the Whiskey-class submarines and shared a similar sonar arrangement. Like most conventional submarines designed 1946–1960, their design was influenced by the German World War II Type XXI U-boat.
The Type 41 or Leopard class were a class of anti-aircraft defence frigates built for the Royal Navy and Indian Navy in the 1950s. The Type 41, together with the Type 61 variant introduced diesel propulsion into the Royal Navy, the perceived benefits being long range, low fuel use, reduced crew, and reduced complexity.
The Type 61 Salisbury class was a class of the Royal Navy aircraft direction (AD) frigate, built in the 1950s. The purpose of the aircraft direction ships was to provide radar picket duties at some distance from a carrier task force and offer interception guidance to aircraft operating in their area.
HMS Torquay was a Type 12 Whitby-class frigate of the British Royal Navy. They were the first frigates to have the "V" form hull. This evolutionary design made it possible to be driven in head sea without the usual slamming which occurs with conventional destroyers of the time. Each frigate cost 3.5 million pounds and the first ship completed was Torquay in May 1956.
The Type 16 frigates were a class of British anti-submarine frigates of the Royal Navy. They were based on the hulls of World War II-era destroyers that had been rendered obsolete by rapid advances in technology. They were similar in concept to the Type 15 frigate, but were a far more limited design rendered necessary by budget constraints.
HMS Brighton was a Rothesay or Type 12I class anti-submarine frigate of the Royal Navy.
HMS Superb was a Minotaur-class light cruiser of the Royal Navy. The ship entered service in 1945 and had a brief, quiet career before being decommissioned in 1957 after her modernisation was cancelled. She was broken up in 1960.
The Ashland-class dock landing ship were the first class of dock landing ship of the United States Navy. They were built during World War II. A dock landing ship is a form of auxiliary warship designed to support amphibious operations. Eight ships were built for the United States Navy and they remained in US service until the 1960s. Two of the class were sold for export overseas, with one joining the Republic of China Navy and the other the Argentinian Navy. The two transferred ships stayed in service until the 1980s. All eight ships were scrapped.
The Neptune class was a proposed class of cruisers planned for the British Royal Navy in the latter years of the Second World War. They were large ships which were to be armed with twelve 6-inch (152 mm) dual-purpose guns and with a heavy secondary armament. Although five ships of the class were planned in 1944, they were cancelled following the end of the war and before construction could begin.
The Centauro class consisted of four frigates built for the Italian Navy during the 1950s. They entered service in 1957, with the last one being stricken in 1985.