Fighter Command 1936-1968 Fighter Command 1936-1968 AN OPERATIONAL AND HISTORICAL RECORD KEN DELVE x Pen & Sword AVIATION First published in Great Britain in 2007 by Contents PEN & SWORD AVIATION an imprint of Pen & Sword Books Ltd 47Church Street Barnsley South Yorkshire S702AS CHAPTERO NE Development, Roles and History . Copyright © Ken Delve, 2007 CHAPTER Two Operations 98 ISBN I 844156139 CHAPTER THREE Operational Groups 183 The right ofKen Delve to beidentifiedas Author of this Work CHAPTER FOUR Aircrew Training . . 214 has been asserted by him in accordance with the Copyright, Designs and PatentsAct 1988. CHAPTER FIVE Operational Aircraft 245 A CIPcatalogue record for this book is ANNEXES available from the British Library. A: AOC-in-C Fighter Command . . . . . . . . . . . . 310 B: Battle ofBritain Squadrons . . 313 All rights reserved. No part of this book may be reproduced or transmitted C: Battle of Britain: Galland's View . 316 in any form or byany means,electronic or mechanical including photocopying, recording or byany information storage and retrieval system, without permission D: Order of BattleJuly 1936 . 322 from the Publisher in writing. E: Order of Battle September 1939 . 323 F: Order of Battle August 1940 . . . 325 Typeset by Concept, Huddersfield,West Yorkshire Printed and bound in Great Britain by G: Order ofBattle February 1941 . 327 CPI UK H: Order ofBattle April 1942 . 329 I: Order of Battle April 1943 . 332 J: Order ofBattleJuly 1944 . . 335 Pen & SwordBooks Ltd incorporates the Imprints of K: Order ofBattleJuly 1945 . . 337 Pen & Sword Aviation, Pen & Sword Maritime, Pen & Sword Military, L: Order of Battle April 1953 . 339 Wharncliffe Local History, Pen & Sword Select, M: Order ofBattleJanuary 1961 . . 341 Pen & Sword MilitaryClassicsand Leo Cooper. N: Order ofBattleJanuary 1968 . 343 0: Claims World War Two . . . . . . . . . . . . 344 P: Definitionsof Operation Types . . 348 For a complete list of Pen & Sword titles pleasecontact Q: Fighter Command Battle Honours . . 351 PEN &SWORD BOOKS LIMITED 47Church Street, Barnsley, South Yorkshire, S702AS, England. R: German Night Attackson Cities . . . . . . . . . . . 356 E-mail:[email protected] 358 Website:www.pen-and-sword.co.uk INDEX Fighter Command Badge P ER ONE Development, Roles and History orafewshortmonthsinlate 1940,FighterCommandoftheRoyalAir Force was pitted against the might of the German Luftwaffe in a struggle that would help ~ ~, determinethecourseofthe Second World War. The Battle ofBritain willalways remain the Command's 'Finest Hour' but itcomprisedonlya fewmonthsofa war that ~ lasted nearly six years- and Fighter Command was involved in active operations for I I~ much of that time. As with all history the benefits of hindsight and access to previously classified ~ ~ documentarysourceshasto bebalancedbythe researcher'sremoval intimeandcontext from the period under study. To truly understand decisions, policies, actions and attitudesisallbut impossible.This book covers theentire period of Fighter Command from itsoriginin 1936to itsdemise- into StrikeCommand- in 1968.Whilst allperiods of the Command are covered it is inevitable that the major focus is on the period of 'In front of a Portcullis a sword erect' (elements of the Badge were subsequently WorldWarTwo.Thebook hasbeendividedintofivemainsections:anIntroduction and used by Strike Command). The sword is indicative of the Command's offensive Overview, which sets the framework for the development of Fighter Command and includes both policyand politics;an Operationschapter, which focuses on the combat operations and the Portcullis symbolisesitsdefensiverole;thisduality italso shown operationsofthe Command;abrieflookateachofthe operationalGroups;anoverview in the motto of 'Offence Defence'. The Badge was approved by in March 1945. ofaircrew training:and, finally, an Aircraft chapter, looking in chronologicalsequence at all operational aircraft types. The annexes provide a variety of historical data. The chapters frequentlyquote extractsfrom the Operational Record Books(ORB) of varioussquadrons; these have been selected as typical of the typeof missions being flown.Itwouldbeimpossibleinabook ofthissorttoresearcheverysquadronrecordfor Fighter Command and there aresimilar accounts, and perhaps better ones,in manyof theother ORBs- ifa reader believes'his' squadron has been ignored Ican assure him that that was not the intent! Origins and doctrine Fighter Command was formed on 14July 1936,under thecommand ofAir Marshal Sir Hugh Dowding, as part of a generalreorganisation of the RAF,and headquartered at Bentley Priory, Middlesex. This reorganisation saw the Metropolitan Air Force split into three operational Commands (Fighter, Bomber and Training). At the time of its formation Fighter Command's equipment comprised a variety of biplane fighters, the most modern ofwhich was the Gloster Gladiator. As the first RAF fighter with eight machine-guns and an enclosed cockpit, the Gladiator represented a major advance on previoustypesanddespiteitsobviouslimitationswasabletodistinguish itselfduringthe Battle of Britain. Since the early 1930s two key issues had plagued RAF planners- the percentage of bomber to fighters in the overall strength of the RAF and the types of weapons they should carry. There had been a glimmer of hope in the early I920s, a period of doldrums for the RAF when its very existence as an independent service was under 2 FIGHTER COMMAND 1936-1968 DEVELOPME T, ROLES AND HISTORY 3 TheSiskin lI'asoneofthe inter-waragile billpoorly-armedfightersequipping the RAFs fighterforce. Fighter doctrineand tactics IIwedevelopedin the latterpart ofWorld War One. withaircraft such as the Sopwith Camel. 1925theGovernment'sinterpretationof'assoon aspossible' changed to 'by 1935-1936. Air Marshal SirJohn Salmond had taken over asAir-Officer-CommandingAir Defence questionand itsmain 'strength'wasinremote partsofthe Empire suchasMesopotamia. ofGreat Britain inJanuary that year and hehad firmviewson air defence, which in his In April 1923 the Steel-Bartholomew Committee on the Air Defence of Great Britain view- and hisexperience from World War One- included searchlightsand anti-aircraft led to Government approval in June of a plan for a Home Defence air strength of guns. In thisstudy ofFighter Command onlyoccasional reference ismade to the other 52 squadrons, to include 17 fighter squadrons 'with as little delay as possible'. As a elements that made up the UK's air defence network. primarily because they were percentage ofthe total strength the fighter element was poor - but this was the period independentCommands.It isworth noting thatthe'activedefence' planned for the UK. whenairstrategistswereconvincedthat bomberswerethewaytowinwars.InDecember and to bein place by 1939.comprised2.232 heavyanti-aircraftguns,4,700searchlights Map ofthe /923 Air Defence Plan. When the Gladiatorenteredserviceit lI'asamajor improvement on thepreviousbiplanesbut lI'asstillforfrom beingamodernfighter,although it remained infro nt-line service with the RAFin theearlypart ofthe lI'ar. III LO" , ~ c • I ,N.._ r.."I~,.t,,.'""....,.,]~ ~11'1 HI1l11,IJ/OU,h I (....."..11r-----I-(-ID-"-II-" -- - I - - - co..-.5" 4 FIGHTER COMMAND 1936-1 968 DEVELOPMENT, ROLES AND HISTORY 5 and 50squadrons offighter aircraft. However, on the outbreak of war there wereonly Specification FlO/35. Requirements for Single-EngineSingle-Seater Day and Night 695 heavy and 253light anti-aircraft guns and 2,700searchlights. Fighter In December 1929andagain in May 1933the Government slipped the programme back, the latter revision taking it to 1939-1940. This reluctance did not change until General.The Air Staff require a single-enginesingle-seater dayand night fighter which 1934,a yearafter Hitler hadcometo power inGermanyand therewasa realisation that can fulfil the followingconditions: peaceinEuropewasbynomeansacertainty.Thenextfewyearssawachangeofattitude a. Havea speed in excessofthe contemporary bomber of at least 40mph at and a series of Expansion Plans, albeit stilldominated by strategic bombing. 15,000ft. The 'bomber first' mentality that had dominated the Expansion Plansof the early b. Have a number of forward firing machine guns that can produce the 1930sdid not changeuntilSchemeM,whichwasapproved in November 1938(after the maximum hittingpower possibleintheshortspaceoftimeavailablefor one Munich Crisis), with an effective date for completion of March 1942. This scheme attack. envisaged 163squadronsto bebasedintheUK,ofwhich64wereto befightersquadrons (14ofthese being AuxiliaryAir Force), each with an establishment of 16 aircraft. The Performance. table below presents thedetails for the Plans put forward between 1934and 1938. a. Speed. The maximum possible and not less than 310mph at 15,000ft at maximum power with the highest possible between 5,000 and 15,000ft. b. Climb. The best possible to 20,000ft but secondary to speed and hitting RAF ExpansionSchemes, t934-1938 power. Fighter UEfighter c. Serviceceiling. ot less than 30,000ft isdesirable. Scheme Approved Effective Squadrons squadrons squadron d. Endurance. Y.hour at maximum power at sea level, plus one hour at maximum powerat whichenginecan be runcontinuouslyat 15,000ft.This A 18Jul 1934 31Mar 1939 84 28+5 12 should provide \I, hour at maximum power at which engine can be run C 21May 1935 31Mar 1937 123 35+5 12 F 25Feb 1936 31Mar 1939 124 30+5 14 continuously(for climb, etc), plus one hour at the most economicalspeed H 14Jan 1937 31Mar 1939 145 34+9 14 at 15,000ft (for patrol), plus Y.hour at maximum power at 15,000ft J 22Dec 1937 Summer 1941 154 38+9 14 (for attack). K 14Mar 1938 31Mar 1941 145 38+9 14 L 27Apr 1938 31Mar 1940 141 38+9 16 M 7Nov 1938 31Mar 1942 163 50+14 16 Armament. Not less than 6 guns, but 8 guns are desirable. These should be located outsidetheairscrewdisc.Reloadingintheairisnot requiredandthegunsshouldbefired Note: Approved - Date the scheme was approved by the Cabinet; Effective - Date at which the byelectrical or means other than Bowden wire. It is contemplated that some or all of scheme should be complete;Squadrons- Total home-based squadrons; Fighter squadrons - Regular these guns should be mounted to permit a degree of elevation and traverse with some squadrons+auxiliarysquadrons:UEfightersquadron- Aircraftestablishment. form ofcontrol from the pilot's seat. Thiswasofcourseonlya paperairforce;thedesiretohave64squadrons,eachwith Ammunition. 300rounds per gun if8gunsare provided and 400 roundsper gun ifonly 16aircraft- and withtherequisite pilots,ground staff, equipment and airfields- had to 6 guns are installed. be transferred into reality.That meant takingshortcutswith theaircraft types, 'form a squadron with whatever was10 hand and re-equip it later' and pressure to find pilots, View. and train them in the minimum period of time. Both oftheseaspects would cause the a. The upper hemisphere must besofar aspossibleunobstructed totheviewof Command problems. the pilot to facilitatesearchandattack.Agood viewfor formation flyingis required. b. A fieldofviewof about 10degreesdownwardsfrom the horizontal lineof Roleof the Fighter sight over the nose is required for locating the target. The concept of the fighter aircraft had been born in World War One, when manoeuvrability was one of the key performance criteria; for the Royal Flying Corps! Handling. RoyalAir Force,theexperience withmonoplaneshad beenanunhappyoneand thewar a. A high degree ofmanoeuvrability at high speeds is not required but good ended with small,single-seat highly-agile biplanes,armed with two 0.303inguns,as the control at lowspeeds isessential. standarddayfighter.Thesituationdidnot change overthenext 20yearsand theRAF's b. The aircraft must be a steady firing platform. fighter squadrons continued to fly a range of delightful little fighters that by the late 1920shadallbutlosttouchwiththerealitiesofafutureairwar- buttheRAF'sdoctrine, It is interesting to look at how the fighter requirement had changed during the tactics and training had also not changed. It was not until the early 1930s that a more 1930sas thisexplainsthedevelopmentofboth the aircraft's capabilitiesand the tactical realisticspecification fora futurefighterwas issued. However, Specification FIO/35still doctrine.Duringthe 1930sthe basicconceptswerestillthosethat had beendeveloped in encapsulatedthe1930'sfighterdoctrine;thefollowingextractsillustratethemajorpoints. the latter years of World War One;with no significant combat experience in the 1920s 6 FIGHTER COMMAND 1936-1968 DEVELOPMENT, ROLES AND HISTORY 7 andintheabsenceofconflict (and funding)noappreciabledevelopmentoftechnologyor tactics thiswasnot reallysurprising.The main fighter specification thateventually ledto the new generation of fighters was F7/30 for a 'Single-Seater Day and Night Fighter.' This Specification was dated October 1931 and the General Requirements paragraph included statements suchas'a satisfactoryfighting viewisessentialanddesignersshould consider the advantages offered in this respect by the low-wing monoplane or pusher. The main requirements for the aircraft are: a. Highest possible rate ofclimb. b. Highest possible speed at 15,000ft. c. Fighting view. d. Capability ofeasy and rapid production in quantity. e. Ease ofmaintenance. This wasa lengthydocument and amongst the keyprovisionswas that the 'aircraft HurricaneprototypeK5083flew illNovember 1935- themodernagehadarrivedand600 had must havea highdegree ofmanoeuvrability.' Bythe timeofFI0/35thisrequirementhad alreadybeenordered'off thedrawingboard'. been toned down as being 'not required'. The aircraft was to have provision for four 0.303inVickersguns and a totalof2,000roundsofammunition,with a minimumsupply specification is issued to govern the production of a day fighter in which speed in of400 rounds per gun, as wellasbeingable to carryfour 20lb bombs.It stated that two overtakingtheenemy at 15,000ft,combinedwith rapidclimb to thisheight,isofprimary ofthe guns wereto bein thecockpit,with interruptergearifrequired,and the othertwo importance. In conjunction with this performance the maximum hitting power must incockpitor wing.Therewas no requirementforan enclosed cockpitand thepilot'sview be aimed at, and 8 machine guns are considered advisable.' No mention here of was a prime concern: 'the pilot's view is to conform as closely as possible to that manoeuvrability;what is needed is to catch the enemy (bomber) and hit him hard in a obtainablein'pusher'aircraft.' Virtuallyallofthese requirementscould besaid to apply singleattack.Allofthiswasencapsulated in FI0/35but with the added provisionsunder to an aircraft that suited the latter part ofWorld War One, such as the Sopwith Camel 'Handling' that emphasised the requirement forthe fighter to be 'a steadygun platform' or Bristol Fighter but with (slightly) improved inwhicha 'highdegree ofmanoeuvrabilityathighspeedsisnot required.' Ofcourse,the performance. If the manufacturers had followed British were not alone in this fighter theory and in Germany the Bf 110came from a these requirements to the letterthen the Spitfire and similarbomber-destroyer requirement. Thelatterproved a disasterindayfighting andif Hurricane might never have been born. theRAF'snewdayfighter had been ofasimilarilkthen the Battle ofBritain would have In terms of overall air doctrine the emphasis beenshort-lived - and lost. Ratherthan entering the annals as oneofthegreat fighters, was on the bomber - the 'war-winning' weapon a Spitfire to this requirement would have followed the Defiant into the records as a that will always get through no matter what the glorious failure (as a day fighter). defenders try and do, but it was not until the mid From its first flight on 6 November 1935 the Hawker Hurricane showed every 1930s that a fighter specification addressed the indication of being a winner; true it did not have the agility, and some would argue problem of shooting down these 'war winners'. beauty,ofthe olderbiplanesbut itlooked thepart ofa modernfighter - and it had eight Whilst the basic provisions of F7/30 could be said guns. An order for 600 was promptly placed and two years later the first Hurricanes to describe an agile, manoeuvrable fighter, those of entered squadron service, going to III Squadron at ortholt to replace Gauntlets; by F5/34(dated 16 November 1934)tipped the balance summer 1939 the number ofsquadrons had increased to 12and the Hurricane was the to what is best described as a bomber destroyer. most significant fighter in the Order of Battle. By that time it had been joined by the The introduction to this specification stated that: SupermarineSpitfire,which had first flownfivemonthsafterthe Hurricanebut had been 'the speed excess of a modern fighter over that of slightlyslowerinproduction development,the firstmachinesnotjoining 19Squadron at a contemporary bomber has so reduced the chance Duxford until August 1938.The Spitfire toowasanimmediate hit with those whosawit of repeated attacks by the same fighters(s) that it andcertainlywith thosewhoflewit;true,bothtypeshad teethingtroublesandbothwere becomes essential to obtain decisive results in the lackingwhatwouldsoonbeconsidered asessentialoperationalequipment, but theywere shortspaceoftime offered for one attack only.This nevertheless an indication ofmassive progress. Two otheraircraft typesentered servicewith the Command in responseto doctrine that called for a 'turretfighter',asabomber-destroyer,and long-rangefighter. Itmustbe Notonly theaircraft but also thetactics remained remembered too that at this time the threat was perceived as bombers from Germany out-of-dateill/a the 1930s; Hawker Demonsof 23 Squadron; theSquadrondid1I0t re-equipfrom bombersthat would have to flysucha distance that single-seat fighter escort wasnot an Demons until December 1938. option.The Boulton Paul Defiantwasthe turretfighter with itsfour Browningsina rear; 8 FIGHTER COMMAND 1936- 1968 DEVELOPMENT. ROLES AND HISTORY 9 bomber. would flystraightand levelwhilethe fightersqueued up to attack it!The three main attacks. as directed in 1938. were: No. 1 Attack was a succession of single aircraft attacking a single bomber fromastern.withSectionsstepped downinlineastern behind thetarget. The Section Leaderopensfireat400yardsand maintainshisfireonthe target at this range until he decides to break away. with the procedure then followed by his umber 2and umber 3. o. 2 Attack was pretty much the same except that the Sections were not stepped down but fanned out to rear and flanks of the bomber. o. 3 Attack was an attack by a vic Section of 3 against a vic of three bombers.with thenormal plan beingfor twoSections abreast toengage two groups ofbombers. one Section breaking left aftercompleting the attack and the other breaking right. There werenumerousothersetattacks forsingle-engineand turretfightersbut these threeencapsulate a number of the major problemsthe fighters wereto encounter when TheSpitfireprototypeflew inearly 1936but didnot entersquadronserviceuntil August 1938 the shooting war started. Firstly. the determination that 400 yards was the optimum - only ayearbefore the war. range to open fire and that the fighter should maintain this range until out of the prototype flew in August 1937 and the type entered servicewith 264 Squadron in ammunition(or shotdown).Whilst there wassomevariationonthisdirective.theystill December 1939. by which time the concept was already being questioned. The Bristol involved an error of appreciation ofthe real optimum harmonisation and engagement Blenheim was thelong-rangefighter and startled the RAF when it flewin 1936. as this range.Secondly.therigid natureofthetacticswastotallyunsuited to thefluidnatureof private venture for a bomber had far better performance than any of the fighters in 'modern' air combat. These lessons were soon to be learnt. service. Fighter Command wasduly impressed and an order for 150 Blenheim fighters Waralmostcameinautumn 1938withtheso-called MunichCrisis;ifithaddone so wasplaced.themainrolebeinglong-range bomber-destroyer. for whicha forward-firing then itwould havefound Fighter Command ina parlousstate intermsofaircraft andits four-gun armament pack was added. Hawkinge-based 25 Squadron was first to equip Controland Reporting(C&R) organisation.The Command needed the extra year that with the Blenheim IF day fighter. December 1938. camefollowing PrimeMinister evilleChamberlain's meeting withAdolfHitlerand the Despitethearrival ofnewaircraft.thebasictacticsremained unchangedandin 1938 doctrine wasstillbasedon a limited numberofwell-rehearsed - but unproven- Fighter Catterick March1940. Blenheim219 Squadron;althoughthe Blenheimssawsomeserviceas CommandAttacks.whichseemedto bebasedon the premisethatthetarget.alumbering dayfightersit wasinthenight rolethat they becameanimportant element ofFighter Command. Blenheim of 600 Squadronat Manstonmid1940;the Blenheim enteredservicewith Fighter Commandasalong-rangefighter- in whichroleit wouldharebeenadisaster. 10 FIGHTER COMMAND 1936-1968 DEVELOPMENT, ROLES AND HISTORY II now infamous 'peace in our time' agreement. During that year more modern fighters At the first meeting of the Committee for Scientific Survey of Air Defence, in enteredserviceand theirpilotsgainedexperience,theC&Rorganisationgrewinsizeand January 1935, the problems highlighted bythe previous year's exercisewerediscussed, experience and the airfield building programme started in earnest. aswerethe prospectsofanyscientificbreak-through that might providean answer.The Committeemembersconsulted Robert Watson-Watt, head oftheradio research branch ofthe ationalPhysical Laboratory,as to thefeasibilityofusingradio waves.Amonth Control and Reporting- and integrated defence later he presented his thoughts on how to use such radio waves to detect aircraft, the There is one line in the 1965 'Battle of Britain' film where Dowding is asked if he is principle being to 'bounce' the waves off the aircraft and pick up the echo. Within a 'trustingin radarand prayingto God',to whichhe replied that hewas 'trustingin God matter of weeks an experiment had been arranged using the BBC's transmitter at and praying for radar'. It is a well-established part of the Battle of Britain story that Daventry.Theidea wasfor anaircraft toflythroughthecentre ofthetransmittingbeam radar was thesecret weapon that saved theday. How true isthis? while Watson-Watt and his colleagues attempted to detect its presence on a cathode Theearly 1930'sBritishAir DefencePlan wasbaseduponthatemployedduringthe ray oscillograph. It worked as planned, the passage of the aircraft causing a blip First World War andcomprised anAircraft FightingZone 15mileswideand 150miles on the equipment. Allthat was needed now was high-level support for development of long, from Duxford and around London to Devizesin Wiltshire.Thiswasdivided into the technique, and that came from Air Marshal Hugh Dowding, the Air Member for ten sections, each 15 mileswide and with one Research and Development. or more dedicateddayfighter squadrons,with The radio research station at Orfordness became the experimental site for the associated searchlights and anti-aircraft guns. development of RDF (the name was notchanged to radar until 1941), and throughout There was an additional ring of searchlights the summer a number of trials were conducted. Tracking ranges of 40 miles were and guns around London.The Aircraft Zone soon beingachieved, and it was obvious that here was the solution to the problem; all was positioned 35 miles from the coast, a that was needed wastime to develop and introducetheequipment, and integrateitinto distancebased upon thetimeitwould takethe the Fighter Command system. In September 1935 the Air Defence Sub-Committee fighter to climb to 14,000ft. Initial detection acquired Treasury funding for a chain of RDF stations along the east coast; a of raiders depended upon visual sighting by remarkable achievement so early in the development of the technique. The next three the Observer Corps, plusa limited number of years saw a number of technical developments of the equipment, many individuals 'acoustic mirror devices'. Each HQ received makinginvaluablecontributionsto thework,sothat bymid-1938thecompletedstations information from the observation units and were functioning reasonablywell displayed raidsona plottingtable,thusallow Since the initial proving of the RDF principle in 1936, progress had been fairly ing the overall picture of the air situation to rapid, although many problems still remained. By mid-1937 three stations were in be seen by the controller. However, it was operation, at Bawdsey, Canewdon and Dover,along with an experimentalfilter station not until new radios, such as the TR.9, were at Bawdsey.Thedevelopment ofthelast oftheseadded a newdimension to thesystem introducedin 1932that reasonableground-to byproviding,astheterm implied,afilteringofthemassofinformation from thevarious air radiocommunication, as opposed to wrr, sources so that the controllers could be provided with a simpler, more accurate air waspossible;eventhentheeffectiverangewas picture on which to base their operations.The earlier problem oftrack discrimination I only 35miles. had virtually been solved, but height prediction remained a significant problem. The Theweak link remained that ofdetection system's first major test came in the 1938 Home Defence exercises, and in general - it was a big sky so how did you find the terms it appeared to work well, some 75% of attempted interceptions (day and night) enemy? If the enemy could not be accurately provingsuccessful.NewRDFstations(codenamedChainHome- CH,andChainHome located, it was almost impossible to effect an Low - CHL) were constructed in a plan to create unbroken coverage around the east interception. This was borne out in the July and southern coasts of Britain. At the same time an extensive programme for the 1934 annual air exercise, when at least half construction of Command, Group and Sector operations rooms was under way. of the day bomber formations reached their The enemy could now be located by day or night; radar made no real distinction targetswithout beinginterceptedbyfighters.If between the two. Defending fighters could be positioned so that by day they could thefighters could not find bomber formations acquire the bombers visually, but what about the night situation? Would the fighter be in good weather by day, what chance would able to pick up its targets? Among his early proposals, Watson-Watt had included they have at night? ot that this was ofany thoughts on an airborne version of RDF to prevent reliance on searchlights or good concern at the time. visibility. However, because priority was given to the ground stations, little work was carried out on developingequipment smallenough to becarried byaircraft. June 1937 The radarstationsaroundThecoast werea vita! saw an experiment whereby the 'fighter' had a receiver that could pick up the trans elementin Fighter Command's COII/ro!and missions (and echoes) ofthe CH stations. The principle appeared to work, but it was Reportingnetwork. not a satisfactory solution and was abandoned. Not until late that year was Airborne