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PostPosted: Sat Sep 17, 2022 11:46 am 
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since the 1950s the Royal navy has designated its warship designs with a type number, so type 42 is the sheffield class destroyer, type 82 is bristol class destroyer, type 22 is broadsword class frigate, etc

How are these type numbers assigned? is there a range of numbers reserved for a particular type of ship or class of intended missions?

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PostPosted: Sat Sep 17, 2022 12:31 pm 
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Guided-missile destroyers​
County class: 8 ships (4 Batch I, 4 Batch II), 1961–1967
Type 82: 1 ship (Bristol, 1969) built to trial technology. Eight originally planned to operate with cancelled CVA-01 aircraft carriers.
Type 42: 14 ships (6 Sheffield, 4 Exeter, 4 Manchester), 1971–1983
Type 43: project cancelled at feasibility stage in 1981 Defence White Paper
Type 44: Subclass of Type 43 with better anti-submarine capability.
Type 45: 6 ships, all commissioned between 2009 and 2013
Type 83: Planned to replace Type 45 in 2030s.
https://en.wikipedia.org/wiki/List_of_d ... Royal_Navy

Modern frigates
Type 15 – 23 ships (full rebuilds of World War II destroyer hulls)
Type 16 – 10 ships (partial rebuilds of wartime destroyer hulls)
Type 41 Leopard class – 4 ships
Type 61 Salisbury class – 4 ships
Type 12 Whitby class – 6 ships
Type 12M Rothesay class – 9 ships
Type 12I Leander class – 26 ships (subclasses: 8 Batch 1, 8 Batch 2, 10 Batch 3)
Type 14 Blackwood class – 12 ships
Type 81 Tribal class – 7 ships
Type 21 Amazon class – 8 ships
Type 22 – 14 ships (subclasses: Broadsword 4, Boxer 6, Cornwall 4)
Type 23 Duke class – 16 ships
Type 26 City class – 3 ordered, 8 ships planned
Type 31 frigate – 5 ships planned
Type 32 frigate – 5 ships planned
https://en.wikipedia.org/wiki/List_of_f ... Royal_Navy


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PostPosted: Sat Sep 17, 2022 1:49 pm 
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but how are these numbers assigned? they do not appear to be sequential. for example the soviet/russian project number scheme appears to be roughly sequential in the order with which the design requirements were issued.

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