A flotilla leader was a warship of late 19th century and early 20th century navies suitable for commanding a flotilla of destroyers or other small warships, typically a small cruiser or a large destroyer (known as a destroyer leader). The flotilla leader provided space, equipment and staff for the flotilla commodore (who typically held the rank of captain), including a wireless room, senior engineering and gunnery officers, and administrative staff to support the officers. Originally, older light or scout cruisers were often used, but in the early 1900s, the rapidly increasing speed of new destroyer designs meant that such vessels could no longer keep pace with their charges. Accordingly, large destroyer designs were produced for use as leaders.
As destroyers changed from specialized anti-torpedo boat vessels that operated in squadrons to larger multi-purpose ships that operated alone or as leaders of groups of smaller vessels, and as command and control techniques improved (and the technology became more readily available), the need for specialized flotilla leaders decreased and their functions were adopted by all destroyers. The last specialized flotilla leader to be built for the Royal Navy was HMS Inglefield, launched in 1936. Subsequent leaders used the same design as the private ships of the class, with minor detailed changes to suit them to their role. In the Royal Navy, the flotilla leader and commanding officer were known as Captain (D). In the Royal Navy, flotilla leaders and divisional leaders could be identified by particular coloured bands painted on their funnels.
Flotilla leader designs
French Navy
Jaguar-class flotilla leader
Guépard-class flotilla leader
Aigle-class flotilla leader
Le Fantasque-class flotilla leader
German Navy
Type 1936A-class destroyer
Imperial Japanese Navy
Tenryū-class light cruiser
Kuma-class light cruiser
Nagara-class light cruiser
Sendai-class light cruiser
Agano-class light cruiser
Royal Navy
Swift – prototype (1907) Faulknor-class leader (1915) Marksman-class leader (1915) Parker-class leader (1916) Admiralty V-class leader Admiralty type leader (1918) Thornycroft type leader (1920) The leader of each of the "interwar standard" A- through I-classes was built to a slightly enlarged design: Codrington (1930) Keith (1931) Kempenfelt (1932) Duncan (1933) Exmouth (1934) Faulknor (1935) Grenville (1936) Hardy (1936) Inglefield (1937)
Royal Italian Navy
Capitani Romani-class flotilla leader
Royal Netherlands Navy
Tromp-class flotilla leader (Sometimes classed as a light cruiser)
Royal Romanian Navy
Mărăști-class flotilla leader
Royal Yugoslav Navy
Destroyer Dubrovnik (1931) Destroyer Split
Soviet Navy
Leningrad-class destroyer
Tashkent-class destroyer
United States Navy
Porter-class destroyers
Somers-class destroyers
Atlanta-class light cruisers (were originally designed as flotilla leaders, though soon retasked as anti-aircraft cruisers) See the List of United States Navy destroyer leaders for post-World War II ships