Type system of the Royal Navy

Type system of the Royal Navy

The Type system is a classification system used by the British Royal Navy to classify surface escorts by function. The system evolved in the early 1950s, when the Royal Navy was experimenting with building single-purpose escort vessels with specific roles in light of experience gained in World War II. The following Type numbers are known to have been used, or proposed;

Types 11-40, Anti-Submarine Escorts

* Type 11 : Diesel powered anti-submarine frigate based on hull of Type 41 / 61. Not built.
* Type 12 "Whitby" : Steam powered, high-speed first-rate anti-submarine frigate.
* Type 12M "Rothesay" : Improved Type 12 design.
* Type 12I "Leander" : Modified Type 12, general purpose frigate.
* Type 14 "Blackwood" : Steam powered, high-speed, second rate anti-submarine frigate.
* Type 15 : High-speed anti submarine frigate, full conversion of wartime destroyer hulls.
* Type 16 : High-speed anti submarine frigate, limited conversion of wartime destroyer hulls.
* Type 17 : Third rate anti-submarine frigate, analogous to wartime corvettes. Not built.
* Type 18 : High-speed anti submarine frigate, intermediate conversion of wartime destroyer hulls. Not built.
* Type 19 : Very high speed (42 knot) gas turbine powered anti-submarine frigate. Not built.
* Type 21 "Amazon": General purpose, gas-turbine powered commercially designed frigate.
* Type 22 "Broadsword" : Large, gas-turbine powered, anti-submarine frigates.
* Type 23 "Duke" : Gas-turbine and diesel powered, anti-submarine frigates. Smaller and less expensive than the Type 22, with similar capabilities.
* Type 24 : Commercial competitor to Type 23 designed by Yarrow. Not built.

Types 41-60, Anti-Aircraft Escorts

* Type 41 "Leopard" : Diesel powered anti-aircraft frigate built on common hull with Type 61.
* Type 42("i")"East coast frigate" : High speed coastal escort. Not built
* Type 42("ii") "Sheffield" : Gas-turbine powered, fleet area-defence anti-aircraft destroyer.
* Type 43 : Large gas-turbine powered, "double-ended", fleet area-defence anti-aircraft destroyer. Not built.
* Type 44 "Emerald" : "Project Horizon, Common New Generation Frigate". Pan-European, advanced fleet area-defence anti-aircraft frigate. Not built.
* Type 45 "Daring" : Advanced fleet area-defence anti-aircraft destroyer to replace Type 44 project.

Types 61-80, Aircraft Direction Escorts

* Type 61 "Salisbury" : Diesel powered aircraft-direction frigate built on common hull with Type 41.
* Type 62 "M" class : High-speed aircraft-direction frigate, full conversion of wartime destroyer hulls. Not built.

Types 81-99, General Purpose Escorts

* Type 81 "Tribal" : Single-shaft steam / gas-turbine powered general purpose "colonial" frigates.
* Type 82 "Bristol" : Large steam / gas-turbine powered fleet anti-aircraft and anti-submarine destroyer. 1 built of 4 initially planned

ee also

*Naming conventions for destroyers of the Royal Navy - describing the various conventions used to name destroyer classes of the Royal Navy since 1913.
*Rating system of the Royal Navy - the system used to classify ships of the line during the age of sail. The "rating" system was briefly revived to further classify anti-submarine escorts during the 1950s.

References

* "Vanguard to Trident : British Naval Policy since World War II", Eric J. Grove, The Bodley head, 1987, ISBN 0-370-31021-7


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