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The British Air Ministry created a designation system for the installations of radio equipment in the late 1930s, each number reflected the standardised installation of a particular radio transmitter or receiver and all the various elements including power units, aerial connections, and control panels etc.
During the war the range of radio equipment multiplied and the installations of all kinds of various receivers and transmitters such as radars and homing devices, radio altimeters and intelligence-gathering signals receivers were added to the list. The system seems to have been in use until at least the late 1980s/early 1990s.
This is not an exhaustive list and I'm sure members here will contribute further additions to this listing.
ARI.35xx Series
ARI.3518 – Indigo Bracket centimetric jammer for V-bombers
ARI.3586 – tuneable beam approach
ARI.50xx Series
ARI.5000 – IFF Mk.II transponder
ARI.5001 – ASV.Mk.II surface-search radar
ARI.5002 – ASV.Mk.II surface-search radar
ARI.5003 – AI.Mk.IV air-search/interception radar
ARI.5005 – AI.Mk.V air-search/interception radar
ARI.5006 – AI.Mk.VI air-search/interception radar
ARI.5007 – ASV.Mk.II surface-search radar
ARI.5008 – ASV.Mk.II surface-search radar
ARI.5010 – IFF Mk.IIG transponder
ARI.5025 – IFF Mk.III transponder
ARI.5027 – IFF Mk.IIE transponder
ARI.5033 – Gee Mk.I radio navigation system
ARI.5036 – IFF Mk.IIN (British) transponder
ARI.5046 – AI.Mk.VII air-search/interception radar
ARI.5049 – AI.Mk.VII air-search/interception radar
ARI.5083 – Gee Mk.II radio navigation system
ARI.5093 – AI.Mk.VIII air-search/interception radar
ARI.5093A – AI.Mk.VIIIA air-search/interception radar
ARI.51xx Series
ARI.5112 – Swordfish radio with R1116 transmitter and T1115 transmitter
ARI.5119 – ASV.Mk.III surface-search radar
ARI.5120 – Rebecca Mk.I radio beacon receiver
ARI.5122 – Monica Mk.I tail warning radar
ARI.5131 – IFF Mk.IIIGR transponder
ARI.5148 – Oboe Mk.I radio blind bombing system
ARI.5151 – Rebecca Mk.III radio beacon receiver, battery operated for use in gliders
ARI.5153 – ASV.Mk.IIIA surface-search radar and H2S Mk.II ground-mapping/bombing radar
ARI.5161 – Rebecca Mk.3 radio beacon receiver
ARI.5162 – (? – uses TR3173 transmitter/receiver and Type 312 (BABS) aerial)
ARI.52xx Series
ARI.5206 – ‘Four Square’ HF radio transmitter/receiver
ARI.5221 – Monica Mk.IB tail warning radar
ARI.5222 – Monica Mk.II tail warning radar
ARI.5253 – IFF Mk.III Lightweight transponder
ARI.5282 – Monica Mk.IIB tail warning radar
ARI.5284 – AYF radio altimeter
ARI.53xx Series
ARI.5307 – HR.ZBX/ ZBM(M) homing beacon fitted to naval aircraft
ARI.5333 – multi-channel general purpose VHF radio, developed to meet OR.3503
ARI.5378 – Low Reading Radio Altimeter Mk.5
ARI.5385 – BABS Mk.1
ARI.5386 – R1125D/R1466 radio receiver
ARI.5395 – TR.1501 radio transmitter/receiver
ARI.54xx Series
ARI.5428 – radio compass
ARI.5487 – sonobuoy receiver
ARI.5489 – TR.1936 radio transmitter/receiver
ARI.5491 – VHF radio transmitter/receiver
ARI.55xx Series
ARI.5502 – AI.Mk.XI air-search/interception radar
ARI.5506 – Rebecca Mk.II radio beacon receiver
ARI.5513 – Peacock/ Oboe Mk.I radio blind bombing system
ARI.5514 – Oboe Mk.II radio blind bombing system
ARI.5525 – Gee-H Mk.I radio navigation system
ARI.5526 – AI.Mk.V air-search/interception radar
ARI.5533 – Blonde Mk.I radar receiver
ARI.5535 – Serrate radar detection and homing receiver
ARI.5538 – Boozer Mk.I RWR
ARI.5543 – Rebecca H radio beacon receiver
ARI.5548 – Bagful Marconi L-band radar receiver
ARI.5552 – AI.Mk.XI air-search/interception radar
ARI.5553 – ASV.Mk.XI surface-search radar
ARI.5557 – Boozer Mk.II RWR
ARI.5559 – Village Inn/ AGLT Mk.I turret ranging radar
ARI.5560 – H2S Mk.II ground-mapping/bombing radar
ARI.5561 – Village Inn/ AGLT Mk.II turret ranging radar
ARI.5562 – Village Inn/ AGLT Mk.III turret ranging radar
ARI.5564 – H2S Mk.3 ground-mapping/bombing radar
ARI.5568 – ASV.Mk.VI surface-search radar
ARI.5569 – ASV.Mk.VII surface-search radar
ARI.5570 – SCR-720/ AI.Mk.X air-search/interception radar
ARI.5571 – ASV.Mk.VIA surface-search radar
ARI.5573 – ASV.Mk.VIIA surface-search radar
ARI.5576 – Benito German radio navigation system
ARI.5578 – AI.Mk.XV air-search/interception radar
ARI.5582 – Album Leaf/ Oboe Mk.II centimetric radio blind bombing system
ARI.5583 – H2S Mk.3A ground-mapping/bombing radar
ARI.5588 – AI.Mk.VIIIB air-search/interception radar
ARI.5590 – H2S Mk.IIC ground-mapping/bombing radar
ARI.5593 – Blonde Mk.II radar receiver
ARI.5594 – Rebecca Mk.IIB radio beacon receiver
ARI.5595 – Ecko/Marconi lightweight surface-search radar for Westland Wessex HAS.3, developed to meet AW.391
ARI.5597 – Gee-H Mk.II radio navigation system
ARI.56xx Series
ARI.5604 – ASV.Mk.VIB surface-search radar
ARI.5607 – AN/APS-4 surface-search radar
ARI.5608 – Liquid Lunch IFF transponder based on AGLT trasmitter
ARI.5610 – Rebecca Mk.IV radio beacon receiver
ARI.5611 – combined Gee-H Mk.II radio navigation system and Rebecca Mk.IIU radio beacon receiver
ARI.5613 – Abdullah Mk.I & Abdullah Mk.II experimental radar homing equipment for Hawker Typhoon
ARI.5614 – ASV.Mk.XII surface-search radar
ARI.5628 – IFF Mk.IIIG transponder
ARI.5632 – Village Inn/ AGLT Mk.IV turret ranging radar
ARI.5634 – ASV.Mk.VIC surface-search radar
ARI.5640 – IFF Mk.III transponder
ARI.5640 – IFF Mk.IIIQ transponder
ARI.5642 – Rebecca Mk.IIT (talking) radio beacon receiver
ARI.5645 – AI.Mk.VIIIB air-search/interception radar with Lucero Mk.II interrogator
ARI.5647 – AI.Mk.XIII air-search/interception radar
ARI.5648 – Eureka Mk.IIA radio beacon receiver
ARI.5649 – AN/APN-2 SCR-729A/ Rebecca Mk.IIA radio beacon receiver
ARI.5650 – ASV.Mk.XIII surface-search radar
ARI.5652 – ASV.Mk.X surface-search radar
ARI.5654 – AI.Mk.XII air-search/interception radar
ARI.5664 – Monica Mk.(?) tail warning radar
ARI.5669 – AN/APX-2 IFF transponder
ARI.5679 – AN/APX-1 IFF transponder
ARI.5685 – (?) proposed for English Electric Canberra B.5
ARI.5687 – Eureka Mk.IIIC radio beacon receiver
ARI.5692 – AI.Mk.XIV air-search/interception radar
ARI.5696 – Gee-H Mk.II radio navigation system modified for tropical use
ARI.5698 – H2S Mk.3F ground-mapping/bombing radar
ARI.5677 – Hookah radar homer and jammer
ARI.57xx Series
ARI.5704 – ASV.Mk.V surface-search radar (may also have been used for AN/APS-2 or APS-3 as ASV.Mk.VA)
ARI.5705 – H2S Mk.3E ground-mapping/bombing radar
ARI.5716 – H2S Mk.3C ground-mapping/bombing radar
ARI.5717 – H2S Mk.3C ground-mapping/bombing radar
ARI.5717(?) – IFF Mk.V transponder
ARI.5718 – Gee Mk.II radio navigation system modified for use in the tropics fitted to Vickers Valetta T.3
ARI.5731 – IFF Mk.IIIG(R) transponder
ARI.5746 – H2S Mk.3H ground-mapping/bombing radar
ARI.5747 – H2S Mk.3G ground-mapping/bombing radar
ARI.5757 – AI.Mk.XIV air-search/interception radar
ARI.5759 – Ferranti Seaspray surface-search radar for Westland Lynx HAS.2, developed to meet NSR.6449
ARI.5764 – ASV.Mk.VIIIA surface-search radar
ARI.5765 – AI.Mk.IX air-search/interception radar
ARI.5787 – (? – uses TR3173 transmitter/receiver and Type 186 aerial)
ARI.5790/1 – Plessey PTR 446 IFF transponder
ARI.5790/3 – Plessey PTR 446 IFF transponder
ARI.5793 – H2S Mk.3B ground-mapping/bombing radar
ARI.58xx Series
ARI.5800 – Orange Putter tail warning radar for English Electric Canberras used for ELINT reconnaissance
ARI.5816 – Gee Mk.3 radio navigation system
ARI.5835 – Rebecca Mk.4 radio beacon receiver
ARI.5848 (?) – AN/APX-25 RWR for McDonnell Douglas Phantom FG.1 & FGR.2
ARI.5848 – AN/APX-6/ RT.82 IFF Mk.V transponder
ARI.5849 – VHF radio
ARI.5856 – Blue Shadow SLAR for English Electric Canberras used for ELINT reconnaissance
ARI.5874 – radio transmitter/receiver fitted to V-bombers
ARI.5875 – IFF transponder
ARI.5877 - sub-miniature radio compass fitted to Vickers Valetta T.4
ARI 5880 - Blue Jacket Doppler radar for Buccaneer
ARI.5885 – Blue Silk/ GPI Mk.4A Doppler navigation radar for Avro Shackleton, English Electric Canberra and Supermarine Scimitar
ARI.5897 – Ferranti AIRPASS I/ AI.23 I-band air interception radar
ARI.59xx Series
ARI.5919 – Red Steer defensive tail radar developed from Ecko AI.20 for V-bombers, developed to meet OR.3510 and ASR.823
ARI.5927 – triple-beam microwave Doppler navigation radar for Westland Wessex HAS.2, developed to AW.96
ARI.5928 – H2S Mk.9 fitted to V-bombers
ARI.5390 – Ferranti AIRPASS III/ Blue Parrot radar for Blackburn Buccaneer
ARI.5933 – AI.Mk.II air-search/interception radar
ARI.5954 – X-band radar transponder fitted to ARI.5595 radar on Westland Wessex HAS.2
ARI.5955 – surface search radar fitted to Sea King HAS.2
ARI.5959 – terrain following radar for Avro Vulcan B.2
ARI.5960 – EMI P391 Q-band SLAR for reconnaissance pack for McDonnell Douglas Phantom FGR.2
ARI.5969 – Texas Instruments RS-700 AN/AAS-18 IR-linescan for reconnaissance pack for McDonnell Douglas Phantom FGR.2
ARI.5972 – Doppler navigation radar fitted to V-bombers
ARI.5979 – Hawker Siddeley Dynamics Type 401 IR-linescan for reconnaissance pack for Sepecat Jaguar GR.1
ARI.5980 – Thorn EMI Searchwater surface-search/air-search surveillance radar for Hawker Siddeley Nimrod MR.2 and Westland Sea King AEW.2
ARI.5983 – M/A Com Ltd. IFF transponder for naval helicopters
ARI.5984 – M/A Com Ltd. IFF transponder
ARI.5987 – IFF Mk.10A transponder, developed to ASR.884, ASR.385 and ASR.400
ARI.5991 – MEL Sea Searcher I-band surface-search radar
ARI.180xx Series
ARI.18011 – ILS fitted to V-bombers
ARI.18021 – Flange S-band/X-band DF and interception
ARI.18025 – Red Shrimp barrage noise jammer for Avro Vulcan B.2, developed to meet OR.3518 and ASR.839
ARI.18032 – HF radio
ARI.18048 – Green Salad UHF homing attachment for VHF radio
ARI.18050 – centimetric DF receiver
ARI.18051 – Tiltman & Langley automatic chaff launcher for V-bombers, developed for meet OR.3525
ARI.18058 – Breton S-band DF receiver
ARI.18070 – sonobuoy receiver system fitted to Avro Shackleton MR.3 & T.4
ARI.18074 – Green Palm VHF jammer for V-bombers, developed to meet OR.3520
ARI.18075 – Blue Diver UHF barrage noise jammer for V-bombers, developed to meet OR.3521 and ASR.800
ARI.18076 – centimetric jammer for V-bombers, developed to meet OR.3618
ARI.18076 (?) – Red Shrimp barrage noise jammer for Avro Vulcan B.2, developed to meet OR.3518 and ASR.839
ARI.18094 – L-band homing receiver, developed to meet OR.3519 and SD.63 in 1951
ARI.18095 – S-band homing receiver, developed to meet OR.3519 and SD.63 in 1951
ARI.18096 – X-band homing receiver, developed to meet OR.3519 and SD.63 in 1951
ARI.181xx Series
ARI.18105 – Blue Saga radar warning receiver for V-Bombers and Blackburn Buccaneer, developed to meet OR.3556 and AW.369
ARI.18107/13 – (?) fitted to V-bombers
ARI.18120 – Violet Picture Plessey UHF homing system
ARI.18129/2 – Violet Picture Plessey UHF homing system for Percival Strikemaster
ARI.18124 – AN/ARC-52 19-preset channel lightweight UHF radio transmitter/receiver
ARI.18124/1 – AN/ARC-52 19-preset channel lightweight UHF radio transmitter/receiver
ARI.18144 – Orange Harvest passive ESM fitted to Avro Shackleton and Westland Lynx HAS.2
ARI.18146 – Red Light GEC X-band search-lock-jam ECM system for Avro Vulcan B.2and Handley Page Victor B.2, developed to meet OR.3585
ARI.18147 – RAE/EMI Q-band radar receiver for English Electric Canberra B.6(BS)
ARI.18197 – Plessey PTR 70 12-preset channel lightweight UHF radio transmitter/receiver
ARI.18197/2 – Plessey PTR 70 12-preset channel lightweight UHF radio transmitter/receiver with homing attachment fitted to Westland Wasp HAS.1
ARI.182xx Series
ARI.18203 – Ferranti RWR/missile warning system for BAC TSR.2
ARI.18223 – Marconi RWR fitted to Hawker Siddeley Harrier & Sea Harrier and Sepecat Jaguar GR.1
ARI.18124/1 – Marconi RWR for Panavia Tornado GR.4
ARI.18228 – Marconi RWR
ARI.18228/1 – RWR fitted to V-bombers
ARI.18233 – Decca ESM for Westland Lynx HAS.2
ARI.18240/1 – Loral 1101 ESM system for Boeing E-3D Sentry, Hawker Siddeley Nimrod MR.2 & R.1
ARI.18241 – Marconi Hermes RWR for Panavia Tornado F.3
ARI.18242 – ESM for ASW helicopters
ARI.230xx Series
ARI.23023 – radio bearing DF
ARI.23057 – standby UHF radio transmitter/receiver
ARI.23061 – (?) fitted to V-bombers
ARI.23062 – radio altimeter fitted to Westland Wessex HAS.1
ARI.23075 – Ryan AN/APN-97A Doppler navigation radar fitted to Westland Wessex HAS.1
ARI.23090 – Collins 618-T HF radio transmitter/receiver
ARI.231xx Series
ARI.23129 – Ferranti forward-looking/terrain-following radar for BAC TSR.2
ARI.23130 – EMI SLAR for BAC TSR.2
ARI.23132 – EMI optical linescan for BAC TSR.2
ARI.23133 – Decca Doppler navigation radar for BAC TSR.2
ARI.23134/4 – (?) fitted to V-bombers
ARI.23134/5 – (?) fitted to V-bombers
ARI.23135 – C-band linescan airborne radio link for BAC TSR.2
ARI.23136 – EMI P391 Q-band SLAR for reconnaissance pack for BAC TSR.2
ARI.23159 – Ultra D503M standby UHF radio transmitter/receiver
ARI.232xx Series
ARI.23245 – communications control system fitted to BAe Hawk T.1
ARI.23246/1 – BG725/ Sky Shadow ECM pods fitted to Panavia Tornado GR.1, developed to meet ASR.853
ARI.233xx Series
ARI.23363 – noise jammer for Westland Lynx HAS.2 and Westland Sea King HAS.5
ARI.23368 – Tacan for Harrier GR.7
ARI.23379 – noise jammer for Westland Lynx HAS.2 and Westland Sea King HAS.5
ARI.23388 – radar altimeter for Harrier GR.7
During the war the range of radio equipment multiplied and the installations of all kinds of various receivers and transmitters such as radars and homing devices, radio altimeters and intelligence-gathering signals receivers were added to the list. The system seems to have been in use until at least the late 1980s/early 1990s.
This is not an exhaustive list and I'm sure members here will contribute further additions to this listing.
ARI.35xx Series
ARI.3518 – Indigo Bracket centimetric jammer for V-bombers
ARI.3586 – tuneable beam approach
ARI.50xx Series
ARI.5000 – IFF Mk.II transponder
ARI.5001 – ASV.Mk.II surface-search radar
ARI.5002 – ASV.Mk.II surface-search radar
ARI.5003 – AI.Mk.IV air-search/interception radar
ARI.5005 – AI.Mk.V air-search/interception radar
ARI.5006 – AI.Mk.VI air-search/interception radar
ARI.5007 – ASV.Mk.II surface-search radar
ARI.5008 – ASV.Mk.II surface-search radar
ARI.5010 – IFF Mk.IIG transponder
ARI.5025 – IFF Mk.III transponder
ARI.5027 – IFF Mk.IIE transponder
ARI.5033 – Gee Mk.I radio navigation system
ARI.5036 – IFF Mk.IIN (British) transponder
ARI.5046 – AI.Mk.VII air-search/interception radar
ARI.5049 – AI.Mk.VII air-search/interception radar
ARI.5083 – Gee Mk.II radio navigation system
ARI.5093 – AI.Mk.VIII air-search/interception radar
ARI.5093A – AI.Mk.VIIIA air-search/interception radar
ARI.51xx Series
ARI.5112 – Swordfish radio with R1116 transmitter and T1115 transmitter
ARI.5119 – ASV.Mk.III surface-search radar
ARI.5120 – Rebecca Mk.I radio beacon receiver
ARI.5122 – Monica Mk.I tail warning radar
ARI.5131 – IFF Mk.IIIGR transponder
ARI.5148 – Oboe Mk.I radio blind bombing system
ARI.5151 – Rebecca Mk.III radio beacon receiver, battery operated for use in gliders
ARI.5153 – ASV.Mk.IIIA surface-search radar and H2S Mk.II ground-mapping/bombing radar
ARI.5161 – Rebecca Mk.3 radio beacon receiver
ARI.5162 – (? – uses TR3173 transmitter/receiver and Type 312 (BABS) aerial)
ARI.52xx Series
ARI.5206 – ‘Four Square’ HF radio transmitter/receiver
ARI.5221 – Monica Mk.IB tail warning radar
ARI.5222 – Monica Mk.II tail warning radar
ARI.5253 – IFF Mk.III Lightweight transponder
ARI.5282 – Monica Mk.IIB tail warning radar
ARI.5284 – AYF radio altimeter
ARI.53xx Series
ARI.5307 – HR.ZBX/ ZBM(M) homing beacon fitted to naval aircraft
ARI.5333 – multi-channel general purpose VHF radio, developed to meet OR.3503
ARI.5378 – Low Reading Radio Altimeter Mk.5
ARI.5385 – BABS Mk.1
ARI.5386 – R1125D/R1466 radio receiver
ARI.5395 – TR.1501 radio transmitter/receiver
ARI.54xx Series
ARI.5428 – radio compass
ARI.5487 – sonobuoy receiver
ARI.5489 – TR.1936 radio transmitter/receiver
ARI.5491 – VHF radio transmitter/receiver
ARI.55xx Series
ARI.5502 – AI.Mk.XI air-search/interception radar
ARI.5506 – Rebecca Mk.II radio beacon receiver
ARI.5513 – Peacock/ Oboe Mk.I radio blind bombing system
ARI.5514 – Oboe Mk.II radio blind bombing system
ARI.5525 – Gee-H Mk.I radio navigation system
ARI.5526 – AI.Mk.V air-search/interception radar
ARI.5533 – Blonde Mk.I radar receiver
ARI.5535 – Serrate radar detection and homing receiver
ARI.5538 – Boozer Mk.I RWR
ARI.5543 – Rebecca H radio beacon receiver
ARI.5548 – Bagful Marconi L-band radar receiver
ARI.5552 – AI.Mk.XI air-search/interception radar
ARI.5553 – ASV.Mk.XI surface-search radar
ARI.5557 – Boozer Mk.II RWR
ARI.5559 – Village Inn/ AGLT Mk.I turret ranging radar
ARI.5560 – H2S Mk.II ground-mapping/bombing radar
ARI.5561 – Village Inn/ AGLT Mk.II turret ranging radar
ARI.5562 – Village Inn/ AGLT Mk.III turret ranging radar
ARI.5564 – H2S Mk.3 ground-mapping/bombing radar
ARI.5568 – ASV.Mk.VI surface-search radar
ARI.5569 – ASV.Mk.VII surface-search radar
ARI.5570 – SCR-720/ AI.Mk.X air-search/interception radar
ARI.5571 – ASV.Mk.VIA surface-search radar
ARI.5573 – ASV.Mk.VIIA surface-search radar
ARI.5576 – Benito German radio navigation system
ARI.5578 – AI.Mk.XV air-search/interception radar
ARI.5582 – Album Leaf/ Oboe Mk.II centimetric radio blind bombing system
ARI.5583 – H2S Mk.3A ground-mapping/bombing radar
ARI.5588 – AI.Mk.VIIIB air-search/interception radar
ARI.5590 – H2S Mk.IIC ground-mapping/bombing radar
ARI.5593 – Blonde Mk.II radar receiver
ARI.5594 – Rebecca Mk.IIB radio beacon receiver
ARI.5595 – Ecko/Marconi lightweight surface-search radar for Westland Wessex HAS.3, developed to meet AW.391
ARI.5597 – Gee-H Mk.II radio navigation system
ARI.56xx Series
ARI.5604 – ASV.Mk.VIB surface-search radar
ARI.5607 – AN/APS-4 surface-search radar
ARI.5608 – Liquid Lunch IFF transponder based on AGLT trasmitter
ARI.5610 – Rebecca Mk.IV radio beacon receiver
ARI.5611 – combined Gee-H Mk.II radio navigation system and Rebecca Mk.IIU radio beacon receiver
ARI.5613 – Abdullah Mk.I & Abdullah Mk.II experimental radar homing equipment for Hawker Typhoon
ARI.5614 – ASV.Mk.XII surface-search radar
ARI.5628 – IFF Mk.IIIG transponder
ARI.5632 – Village Inn/ AGLT Mk.IV turret ranging radar
ARI.5634 – ASV.Mk.VIC surface-search radar
ARI.5640 – IFF Mk.III transponder
ARI.5640 – IFF Mk.IIIQ transponder
ARI.5642 – Rebecca Mk.IIT (talking) radio beacon receiver
ARI.5645 – AI.Mk.VIIIB air-search/interception radar with Lucero Mk.II interrogator
ARI.5647 – AI.Mk.XIII air-search/interception radar
ARI.5648 – Eureka Mk.IIA radio beacon receiver
ARI.5649 – AN/APN-2 SCR-729A/ Rebecca Mk.IIA radio beacon receiver
ARI.5650 – ASV.Mk.XIII surface-search radar
ARI.5652 – ASV.Mk.X surface-search radar
ARI.5654 – AI.Mk.XII air-search/interception radar
ARI.5664 – Monica Mk.(?) tail warning radar
ARI.5669 – AN/APX-2 IFF transponder
ARI.5679 – AN/APX-1 IFF transponder
ARI.5685 – (?) proposed for English Electric Canberra B.5
ARI.5687 – Eureka Mk.IIIC radio beacon receiver
ARI.5692 – AI.Mk.XIV air-search/interception radar
ARI.5696 – Gee-H Mk.II radio navigation system modified for tropical use
ARI.5698 – H2S Mk.3F ground-mapping/bombing radar
ARI.5677 – Hookah radar homer and jammer
ARI.57xx Series
ARI.5704 – ASV.Mk.V surface-search radar (may also have been used for AN/APS-2 or APS-3 as ASV.Mk.VA)
ARI.5705 – H2S Mk.3E ground-mapping/bombing radar
ARI.5716 – H2S Mk.3C ground-mapping/bombing radar
ARI.5717 – H2S Mk.3C ground-mapping/bombing radar
ARI.5717(?) – IFF Mk.V transponder
ARI.5718 – Gee Mk.II radio navigation system modified for use in the tropics fitted to Vickers Valetta T.3
ARI.5731 – IFF Mk.IIIG(R) transponder
ARI.5746 – H2S Mk.3H ground-mapping/bombing radar
ARI.5747 – H2S Mk.3G ground-mapping/bombing radar
ARI.5757 – AI.Mk.XIV air-search/interception radar
ARI.5759 – Ferranti Seaspray surface-search radar for Westland Lynx HAS.2, developed to meet NSR.6449
ARI.5764 – ASV.Mk.VIIIA surface-search radar
ARI.5765 – AI.Mk.IX air-search/interception radar
ARI.5787 – (? – uses TR3173 transmitter/receiver and Type 186 aerial)
ARI.5790/1 – Plessey PTR 446 IFF transponder
ARI.5790/3 – Plessey PTR 446 IFF transponder
ARI.5793 – H2S Mk.3B ground-mapping/bombing radar
ARI.58xx Series
ARI.5800 – Orange Putter tail warning radar for English Electric Canberras used for ELINT reconnaissance
ARI.5816 – Gee Mk.3 radio navigation system
ARI.5835 – Rebecca Mk.4 radio beacon receiver
ARI.5848 (?) – AN/APX-25 RWR for McDonnell Douglas Phantom FG.1 & FGR.2
ARI.5848 – AN/APX-6/ RT.82 IFF Mk.V transponder
ARI.5849 – VHF radio
ARI.5856 – Blue Shadow SLAR for English Electric Canberras used for ELINT reconnaissance
ARI.5874 – radio transmitter/receiver fitted to V-bombers
ARI.5875 – IFF transponder
ARI.5877 - sub-miniature radio compass fitted to Vickers Valetta T.4
ARI 5880 - Blue Jacket Doppler radar for Buccaneer
ARI.5885 – Blue Silk/ GPI Mk.4A Doppler navigation radar for Avro Shackleton, English Electric Canberra and Supermarine Scimitar
ARI.5897 – Ferranti AIRPASS I/ AI.23 I-band air interception radar
ARI.59xx Series
ARI.5919 – Red Steer defensive tail radar developed from Ecko AI.20 for V-bombers, developed to meet OR.3510 and ASR.823
ARI.5927 – triple-beam microwave Doppler navigation radar for Westland Wessex HAS.2, developed to AW.96
ARI.5928 – H2S Mk.9 fitted to V-bombers
ARI.5390 – Ferranti AIRPASS III/ Blue Parrot radar for Blackburn Buccaneer
ARI.5933 – AI.Mk.II air-search/interception radar
ARI.5954 – X-band radar transponder fitted to ARI.5595 radar on Westland Wessex HAS.2
ARI.5955 – surface search radar fitted to Sea King HAS.2
ARI.5959 – terrain following radar for Avro Vulcan B.2
ARI.5960 – EMI P391 Q-band SLAR for reconnaissance pack for McDonnell Douglas Phantom FGR.2
ARI.5969 – Texas Instruments RS-700 AN/AAS-18 IR-linescan for reconnaissance pack for McDonnell Douglas Phantom FGR.2
ARI.5972 – Doppler navigation radar fitted to V-bombers
ARI.5979 – Hawker Siddeley Dynamics Type 401 IR-linescan for reconnaissance pack for Sepecat Jaguar GR.1
ARI.5980 – Thorn EMI Searchwater surface-search/air-search surveillance radar for Hawker Siddeley Nimrod MR.2 and Westland Sea King AEW.2
ARI.5983 – M/A Com Ltd. IFF transponder for naval helicopters
ARI.5984 – M/A Com Ltd. IFF transponder
ARI.5987 – IFF Mk.10A transponder, developed to ASR.884, ASR.385 and ASR.400
ARI.5991 – MEL Sea Searcher I-band surface-search radar
ARI.180xx Series
ARI.18011 – ILS fitted to V-bombers
ARI.18021 – Flange S-band/X-band DF and interception
ARI.18025 – Red Shrimp barrage noise jammer for Avro Vulcan B.2, developed to meet OR.3518 and ASR.839
ARI.18032 – HF radio
ARI.18048 – Green Salad UHF homing attachment for VHF radio
ARI.18050 – centimetric DF receiver
ARI.18051 – Tiltman & Langley automatic chaff launcher for V-bombers, developed for meet OR.3525
ARI.18058 – Breton S-band DF receiver
ARI.18070 – sonobuoy receiver system fitted to Avro Shackleton MR.3 & T.4
ARI.18074 – Green Palm VHF jammer for V-bombers, developed to meet OR.3520
ARI.18075 – Blue Diver UHF barrage noise jammer for V-bombers, developed to meet OR.3521 and ASR.800
ARI.18076 – centimetric jammer for V-bombers, developed to meet OR.3618
ARI.18076 (?) – Red Shrimp barrage noise jammer for Avro Vulcan B.2, developed to meet OR.3518 and ASR.839
ARI.18094 – L-band homing receiver, developed to meet OR.3519 and SD.63 in 1951
ARI.18095 – S-band homing receiver, developed to meet OR.3519 and SD.63 in 1951
ARI.18096 – X-band homing receiver, developed to meet OR.3519 and SD.63 in 1951
ARI.181xx Series
ARI.18105 – Blue Saga radar warning receiver for V-Bombers and Blackburn Buccaneer, developed to meet OR.3556 and AW.369
ARI.18107/13 – (?) fitted to V-bombers
ARI.18120 – Violet Picture Plessey UHF homing system
ARI.18129/2 – Violet Picture Plessey UHF homing system for Percival Strikemaster
ARI.18124 – AN/ARC-52 19-preset channel lightweight UHF radio transmitter/receiver
ARI.18124/1 – AN/ARC-52 19-preset channel lightweight UHF radio transmitter/receiver
ARI.18144 – Orange Harvest passive ESM fitted to Avro Shackleton and Westland Lynx HAS.2
ARI.18146 – Red Light GEC X-band search-lock-jam ECM system for Avro Vulcan B.2and Handley Page Victor B.2, developed to meet OR.3585
ARI.18147 – RAE/EMI Q-band radar receiver for English Electric Canberra B.6(BS)
ARI.18197 – Plessey PTR 70 12-preset channel lightweight UHF radio transmitter/receiver
ARI.18197/2 – Plessey PTR 70 12-preset channel lightweight UHF radio transmitter/receiver with homing attachment fitted to Westland Wasp HAS.1
ARI.182xx Series
ARI.18203 – Ferranti RWR/missile warning system for BAC TSR.2
ARI.18223 – Marconi RWR fitted to Hawker Siddeley Harrier & Sea Harrier and Sepecat Jaguar GR.1
ARI.18124/1 – Marconi RWR for Panavia Tornado GR.4
ARI.18228 – Marconi RWR
ARI.18228/1 – RWR fitted to V-bombers
ARI.18233 – Decca ESM for Westland Lynx HAS.2
ARI.18240/1 – Loral 1101 ESM system for Boeing E-3D Sentry, Hawker Siddeley Nimrod MR.2 & R.1
ARI.18241 – Marconi Hermes RWR for Panavia Tornado F.3
ARI.18242 – ESM for ASW helicopters
ARI.230xx Series
ARI.23023 – radio bearing DF
ARI.23057 – standby UHF radio transmitter/receiver
ARI.23061 – (?) fitted to V-bombers
ARI.23062 – radio altimeter fitted to Westland Wessex HAS.1
ARI.23075 – Ryan AN/APN-97A Doppler navigation radar fitted to Westland Wessex HAS.1
ARI.23090 – Collins 618-T HF radio transmitter/receiver
ARI.231xx Series
ARI.23129 – Ferranti forward-looking/terrain-following radar for BAC TSR.2
ARI.23130 – EMI SLAR for BAC TSR.2
ARI.23132 – EMI optical linescan for BAC TSR.2
ARI.23133 – Decca Doppler navigation radar for BAC TSR.2
ARI.23134/4 – (?) fitted to V-bombers
ARI.23134/5 – (?) fitted to V-bombers
ARI.23135 – C-band linescan airborne radio link for BAC TSR.2
ARI.23136 – EMI P391 Q-band SLAR for reconnaissance pack for BAC TSR.2
ARI.23159 – Ultra D503M standby UHF radio transmitter/receiver
ARI.232xx Series
ARI.23245 – communications control system fitted to BAe Hawk T.1
ARI.23246/1 – BG725/ Sky Shadow ECM pods fitted to Panavia Tornado GR.1, developed to meet ASR.853
ARI.233xx Series
ARI.23363 – noise jammer for Westland Lynx HAS.2 and Westland Sea King HAS.5
ARI.23368 – Tacan for Harrier GR.7
ARI.23379 – noise jammer for Westland Lynx HAS.2 and Westland Sea King HAS.5
ARI.23388 – radar altimeter for Harrier GR.7
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