No. 15 Group RAF

No. 15 Group RAF
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Unit name	No. 15 Group RAF
Dates	1918–1919; 1936–1945
Country	United Kingdom
Branch	Royal Air Force
Role	Maritime patrol, anti-submarine warfare, convoy protection
Command structure	RAF Coastal Command
Notable commanders	Sir Philip Joubert de la Ferté, Air Vice-Marshal John D'Albiac

No. 15 Group RAF was a formation of the Royal Air Force primarily responsible for maritime patrol, anti-submarine warfare and convoy protection during both world wars. Formed initially in 1918 and reformed in the 1930s, it operated from bases around the Irish Sea, North Atlantic Ocean approaches and the Western Approaches to Britain. The group worked closely with naval formations and allied services to counter the U-boat campaign (World War I), later confronting the Battle of the Atlantic and coordinating with units engaged in the Norwegian Campaign and Arctic convoy operations.

History

Created in the closing months of World War I, the group was part of early RAF maritime organisation responding to the U-boat campaign (World War I), Convoy system (First World War), and the protection of shipping around the British Isles. Disbanded post-war amid demobilisation and the Ten-Year Rule (United Kingdom), it was reconstituted in 1936 during rearmament linked to the Anglo-German Naval Agreement tensions and the expansion of RAF Coastal Command. Throughout World War II the group adapted to evolving anti-submarine tactics developed after experiences in the Norwegian Campaign and as the Battle of the Atlantic intensified, liaising with the Royal Navy, United States Navy, and the Royal Canadian Air Force in joint escort and reconnaissance missions. Post-war drawdown and the reorganisation of RAF maritime forces led to its eventual dissolution as Cold War structures emerged influenced by the 1947 National Defence Review and changing NATO responsibilities.

Organisation and structure

The group's headquarters reported to RAF Coastal Command and coordinated multiple wings and squadrons including RAF, Fleet Air Arm, and allied detachments such as No. 422 Squadron RCAF and No. 502 (Vermont) Squadron. Its command relationships included operational control links with the Western Approaches Command, the Admiralty, and allied theatre commands like USAAF in the European Theater. Administrative subunits encompassed maintenance units, seaplane tenders, and training flights tied to establishments such as RAF Mount Batten, RAF Aldergrove, and RAF Pembroke Dock. Tactical doctrine incorporated signals and intelligence exchange with Bletchley Park-derived cryptanalysis outputs and convoy routing guidance from Western Approaches Tactical Unit planners.

Aircraft and equipment

Aircraft types assigned included maritime patrol types such as the Short Sunderland, Consolidated PBY Catalina, Avro Anson, Lockheed Hudson, and later variants of the Vickers Wellington adapted for maritime reconnaissance. Anti-submarine ordnance comprised depth charges, later augmented by aerial rockets and homing devices like ASDIC derivative systems developed alongside Admiralty research establishments and tested with scientific input from Admiralty Research Laboratory. Airborne radar sets such as ASV Mark II, ASV Mark III, and centimetric H2S-derived airborne slotted antennas were retrofitted to improve night and foul-weather detection, assisted by electronic warfare advances pioneered in collaboration with Telecommunications Research Establishment engineers.

Operations and campaigns

The group conducted persistent maritime patrols over the North Atlantic Ocean, escorted coastal convoys in the Western Approaches, and carried out anti-submarine strikes against Kriegsmarine U-boats during the pivotal phases of the Battle of the Atlantic. It supported allied operations including air reconnaissance for the Norwegian Campaign, search-and-rescue coordination for downed aircrew in coordination with Royal National Lifeboat Institution assets, and coverage of Arctic convoy routes to Murmansk. Notable operational interactions involved combined missions with the Royal Navy Home Fleet, cooperation with Coastguard services, and tactical evolutions following intelligence breakthroughs attributed to Room 40 successors in combination with signals units.

Commanders

Senior officers who commanded the group included leaders with prior service in maritime and strategic aviation such as Sir Philip Joubert de la Ferté, Air Vice-Marshal John D'Albiac, and other RAF coastal specialists who later held posts within RAF Coastal Command or at the Air Ministry. Command appointments often reflected experience from interwar naval aviation, postings with the Fleet Air Arm, or staff roles at RAF Coastal Command Headquarters and the Imperial Defence College.

Bases and stations

The group's principal bases and stations encompassed key western seaboard and seaplane facilities including RAF Pembroke Dock, RAF Mount Batten, RAF Aberdovey, RAF Aldergrove, and detachments at RAF Ballykelly and RAF Sullom Voe. It also utilised tendered facilities at Jersey Airport and temporary advanced bases in Iceland and the Faroe Islands during heightened convoy threat periods, coordinating logistics through naval dockyards at Portsmouth and Liverpool.

Category:Royal Air Force groups Category:Military units and formations established in 1918