NOMENCLATURE

NOMENCLATURE EXTANT 1980

Written by Godfrey Dykes

© RN Communications Branch Museum/Library

ETF

OUTFIT		BRIEF DESCRIPTION

AGG	1. 2. 3. 4.	1. HF broadband transmit aerial (Bi-conical) Tiger and Blake - 640 CAW Usually 8-24 MHz 1000 Watts
AHR	1. 2. 3. 4.	A main wire aerial rigged between the mainmast and foremast. Forward part of wire is part of the broadband folded monopole HF aerial. The after part of wire is the MF transmit aerial fed from the ETB Frigates and DLG's When fitted MIXED FIT the whole aerial is connected to the ETB and covers the frequency range of 240 kHz to 2.9999MHz. When fitted ICS the forward part covers the frequency range of the broadband aerial and the after part is connected to the ETB which covers 240 kHz to 3MHz. Mixed Fit with ETB - 500 Watts. With ICS (i) ETB 500 Watts (ii) Broadband carries anything up to 4000 Watts depending on number and configuration of HF transmitters fitted
AHT	1. 2. 3. 4.	A kite type aerial from ETB to top of a mast Assault ships and carriers 200 to 600 kHz 500 Watts
AHU	1. 2. 3. 4.	Main wire aerial rigged between the mainmast and foremast or mainmast/foremast to funnel. Similar to AHR but bigger physical dimensions Some ICS frigates, certain DLG's LPD and Carriers Different configurations but same principles involved as AHR HF aerials. Carriers can use up to 8000 Watts on broadband
AJE	1. 2. 3. 4. 5.	A broadband TX/RX aerial. The figures after the letters desig e.g. AJE(5)...denotes the type and impedance of cable used for aerial feed Most standard fits 225 to 400 MHz Up to approx 140 Watts with type 693 UK/SRA 102
AJK1	1.	UHF aerial assembly comprising wrap around omni-directional aerials. One for TX and one for RX housed in one cover
AJL	1.	VHF broadband TX/RX dipole
AJL(3)	1. 2. 3. 4.	An encapsulated vertically polarised dipole covering the band 100 - 200MHz VHF band of 1203(4) V/UHF Transceiver VHF portable Stornophone equipment for mine hunting vessels FM reception for SRE in MCMV's only
AJM(1)	1. 2. 3.	A UHF aerial assembly incorporating 2 coaxially mounted antennae (1 for TX and 1 for RX) housed in a GRP radome. The assembly is fitted with a flange for mast head mounting This outfit is based on the Airtech 246-2 aerial Batch 1 and Batch 3 Leanders
AN/ARC52	1. 2. 3. 4.	Airborne/Shipborne UHF equipment - (DLG's mainly as a 'bonus' equipment) 225 - 399.9 MHz. 1750 Channels with 100 kHz spacing Manual or 18 pre-set channels with a Guard (243MHz) facility 16 Watts
AN/UGA	1.	Fitted in submarines to convert high speed Morse code broadcast signals to RATT broadcast signals
AJS	1. 2.	A UHF half wave dipole Similar to UK/SRA 102 for MCMV's
AVB/UK SSC 002	1. 2.	SCOT (Small COmmunications Terminal) dish aerial - 3.5 foot for SCOT 1 and 6 foot for SCOT 2 Fitted on an angle either side of the foremast on SCOT ships
AVK	1.	An Active (energised) HF/MF receiving aerial with amplifier
AVL	1.	ICS3 HF broadband transmitting aerial
AVM	1.	ICS3 MF cage transmitting aerial connected to ETB
AWF	1. 2. 3. 4. 5.	A whip aerial normally associated with transmission. Mounted on top of a base tuner Most standard fits 1.5-24 MHz 1000 Watts AWW1
AWF(M)	1.	(M) means modification. As above but lightweight rods.
AWH(M)	1. 2. 3. 4. 5.	A whip aerial - (M) meaning stronger connections - designed for a low power HF transmission system and/or HF MF and LF reception Fitted widely in small ships and in Mixed Fits for 618/619 TX/RX working. Stowed in MCO/CCR ready for fitting in some ICS1 ships Transmission 1.5 to 16 MHz : Reception HF, MF and LF bands. Up to 40 Watts AWY1
AWL(M)	1. 2. 3.	A whip aerial normally associated with transmission but fitted on the hangar roof of Leander class frigates for reception purposes. Can be lowered outboard if required. Helo Fleet Memos and BR766. Mainly ICS1 frigates As for AWN
AWN	1. 2. 3. 4. 5.	A whip aerial normally associated with reception but also fitted as the TX/RX aerial for the 641/643 Most standard fits Depends on the Group transformer (Deck Insulator - DI) OA or OC fitted, but covers frequencies in the LF, MF and HF bands Up to 100 Watts with the 641/643 AWW1
AWV	1. 2.	HF transmit whip with a modified ETC which affords remote tuning of up to 10 pre-set frequencies between 2 and 30 MHz ICS3 ships
AWW1	1. 2. 3. 4.	Replaces AWF(M) and AWN whip aerials. To be used as HF TX/RX whip aerials. 30 foot long. 1973 onwards for new constructions and at long refits HF for TX/RX. V/L/MF for RX with Group OA DI fitted 1000 Watts. Sealed to prevent icing/earthing situations
AWY1	1. 2. 3. 4.	Replaces AWH(M) whip aerial. To be used as HF TX/RX whip aerial. 24 foot long As for AWW1 As for AWW1 100 Watts
AWY2	1. 2. 3. 4.	A variant of AWY1 but for reception only. 16 foot long. As for AWW1 1.5 - 30 MHz Fitted only where space for AWY1 (height limitation) cannot be found
BSU	1.	Broadcast selector unit - used in RWA broadcast side
BRCS	1.	Basic Radio Channel Selection
CAS	1. 2. 3. 4.	LF, MF and HF receiver Fitted in small ships and S/M's as main or secondary receiver. On frigates and above primarily as an emergency receiver. 59 - 555 kHz and 1.47 - 30 MHz CJP1 and 641 RX
CAT	1. 2. 3. 4.	LF, MF and HF receiver As for CAS above 60 kHz to 32 MHz As for CAS above
CAY	1. 2. 3. 4. 5.	MF HF receiver (B40 with CAW EAL, EAO or EZ) Fitted in most ships to cover the frequency gap between CJA and CJD i.e., 650 kHz to 2 MHz 650 kHz to 30 MHz Fitted also in earlier ICS2 ships as GP Bay with FTA/FAZ Being replaced by CJM in some ships on GP Bay and by the CJP(2) with FTA1 in others
CAZ	1. 2. 3. 4.	VLF LF receiver (B41 with CAW EAL, EAO or EZ) As for CAY above As for CAY above As for CAY above
CCX	1.	Control Circuit Exchange - uppers equipment, and lowers users.
CDM	1. 2.	SCOT accessing equipment. Fitted in SCOT KRB. Replaces FDM Fitted on latest SCOT ships and shore bases. Each ship has own code and utilises whole of 2MHz band. Shore bases have ships unique code. No need for a CAB.
CJA	1. 2. 3.	HF synthesised receiver Fitted in ICS1 and ICS1 Mixed Fit ships 2 to 30 MHz
CJC	1. 2. 3.	HF free running version of the CJA above Fitted in ship-shore bay in ICS1 and ICS1 Mixed Fit ships 2 to 30 MHz
CJD	1. 2. 3. 4.	VLF LF synthesised receiver Fitted in most modern ships - S/M's, frigates and above 10 - 200 kHz Being replaced by the FTA in direct association with the CJA/CJM. Fitted into early ships because at the time, FTA was pending!
CJK	1. 2. 3.	HF synthesised receiver Older ships 1 to 30 MHz
CJL	1.	An RA117 - used in EWO to replace EWO CAY/CAZ
CJM	1. 2. 3.	LF MF and HF synthesised receiver Fitted in ICS2 and ICS2 Mixed Fit ships 240 - 525 kHz and 1 - 28 MHz
CJP 1/3	1. 2. 3. 4.	MF HF synthesised receiver, or partly synthesised with a VFO Fitted as main receiver in small vessels (1) - emergency receiver (2) in larger vessels. Replaces CAS/CAT 7 kHz to 30 MHz with FTA : 15 kHz to 30 MHz without FTA A CJP3 is a CJP1 but modified for low magnetic signature for use in MCMV's
CJP 2	1. 2.	MF HF synthesised or partly synthesised receiver with VFO. Fitted with CAW. Replaces CAY/CAZ when fitted with FTA1.
CM1A	1. 2. 3.	VHF channelised to six channels (Pye Cambridge) Fitted in MCMV's. Semi portable. The set cannot be remoted via RN remote systems, and also the makers will not allow a microphone lead of more than 12 feet in length to be used. To get over this limitation, some ships have fitted an aerial change over switch on the bridge and move the set from bridge to W/T office as necessary 10 Watts high power. Less than 1 Watt on low power
CMD	1. 2.	Control and Monitoring Desk Fitted in ICS ships
CT 452A CT 378A	1. 2.	Signal Generators Fitted in Mixed Fit ships for EZ filter tuning
CUH	1. 2. 3. 4.	UHF receiver associated with the 691 transmitter Fitted widely in small ships and on many frigates and above 277 - 283 MHz To be replaced by the 1203
CUJ	1. 2. 3. 4.	UHF receiver associated with the 692 and 693 transmitters Fitted widely on virtually all ships above CMS 225 - 399.9 MHz As for CUH above
CURR	1.	Control Unit Radio Remote - normally called an RCU
CURR	1.	Control Unit Radio Relaying - normally called an RRU
DC AMP	1. 2.	Direct Current amplifier Fitted to specially wired CUJ's to enable Auto UHF to UHF/HF relaying. Part of KMM or KMP
DP(B)	1.	Distribution Panel (Broadcast). Fitted with RWA.
DP(T)	1.	Distribution Panel (Tactical). Fitted with RWA
DPTP(B)	1.	Distribution Panel Teleprinter (Broadcast). Fitted with RWA
DPTP(T)	1.	Distribution Panel Teleprinter (Tactical). Fitted with RWA
DPTP(R)	1.	Distribution Panel Teleprinter (Remote). Fitted with RWA
DP(CCT)	1.	Distribution Panel (Circuit). Fitted with KKA
DP(V)	1.	Distribution Panel (Voice). Fitted with KKA
EAG/H/J	1. 2.	2, 4 or 6 Auto tuned resonators respectively. UHF CAW Fitted depending upon UHF equipment carried
EAK	1.	Hand tuned resonator outfit for Type 691/CUH CAW
EAM	1. 2.	HF common aerial working system Blake and Tiger use this system with 640 transmitters into a AGG
EAN/P/Q	1. 2.	2, 4 or 6 Hand tuned resonators respectively. UHF CAW. Fitted depending upon UHF equipment carried
EAO1	1. 2.	Supplies 2 HF and 2 MF lines to CAY and CAZ respectively Fitted with EZ in ICS1 Mixed Fit ships
EAO2	1. 2.	Supplies 2 HF and 1 MF line to CAY and CAZ respectively Fitted with EZ in ICS1 ships without FTA(2)
EAO3	1. 2.	Supplies 2 HF and 2 MF lines to CAY and CAZ respectively Fitted on small ships or ships without EZ but having EAL3
EAO4	1. 2.	Supplies 3 aerial lines to CJM receiver Fitted in small ICS2 Mixed Fitr ships and in RFA's
EAT	1. 2. 3.	From one aerial input, provides up to 40 outputs for private receivers. Most modern ships in cabin flat and other officers cabins 3 ranges 150-350kHz: 500-1500kHz and 6-28 MHz
EAW	1. 2. 3. 4.	ICS transmitter common aerial working filters with dummy load cabinet. The figure suffix denotes the size and configuration of filters ICS ships EAW range1 is 2-6 MHz: range 2 is 3-11.5 MHz and range 3 is 8-24 MHz Up to 1000 Watts through each filter
EBA1	1. 2. 3.	A single UHF multicoupler drawer assembly incorporating a resonant filter provided with tuning facilities ICS3 ships For use with YBU1 and YBU3
EBA2	1. 2. 3.	Similar to EBA1 but manually tuned ICS3 ships For use with YBU1 to YBU4 inclusive
ETA	1. 2. 3. 4. 5.	HF Base Tuner Fitted in ICS1, some older ships and submarines 1.5 - 24 MHz Up to 1000 Watts Being replaced by the ETE Base Tuner
ETB	1. 2. 3. 4.	MF Base Tuner ICS 1, ICS 1 Mixed Fit ships, ICS 2 and ICS 3 ships 240 kHz to 3 MHz 500 Watts
ETC	1. 2. 3. 4. 5.	HF Base Tuner ICS 1 Mixed Fit 1.5 - 24 MHz 1000 Watts
ETD	1. 2. 3. 4.	HF Base Tuner Fitted in some ships for 618H and 619H transmitters 1.5 - 16MHz 100 Watts
ETE	1. 2.	HF Base Tuner ICS1 and ICS2. Replaces ETA
ETF	1. 2.	HF Base Tuner ICS1, ICS2 Mixed Fit and ICS3. Replaces ETC.
ETG	1. 2. 3. 4. 5.	HF Base Tuner. Automatic ICS1,2 and 3 1.5 to 24MHz 1000 Watts Replaces ETA and ETF if auto tuning is required
EAL/EAL3	1. 2. 3. 4..	Receiver aerial exchange and filter band suppression Fitted in older type ships Filters 1.5-6 MHz and 6, 8, 12, 16 MHz ship-shore band Called EAO4 when fitted into small ICS2 ships and RFA's
EY	1. 2.	ICS transmitter aerial exchange ICS ships. The figure suffix denotes the number and configuration of transmitters/aerials
EZ	1. 2. 3.	ICS receiver aerial exchange Fitted in all modern ships - frigates and above to route receiving aerials to 3 separate lines for each receiver, and for the inclusion of filter band suppression to stop own ship transmitters from causing harmful interference to own receivers when TX and RX are on different frequencies Filters 2-5MHz, 5-10MHz and 10 to 16MHz
FAZ	1. 2.	Adaptor for CAY/CAZ. Gives the receivers an SSB Voice capability and provides flexible stability for F1 reception etc Fitted widely with the CAY/CAZ
FBD1	1.	A broadband transmission filter fitted in ICS3 cruiser CAH
FBD2	1.	As above, but in frigates and destroyers
FBD3	1.	As above, but in HMS Grenville and Training Establishments
FH5	1. 2. 3.	HF/DF equipment ICS ships. No longer EW commitment but now a 'G' department task 2 - 30 MHz
FITS	1. 2. 3. 4. 5. 6. 7. 8. 9.	COMIST (Communications in the Short Term) 640 - CJK - KH ICS1 (Integrated Communications System) TDA - CJA - KMM ICS1 Mixed Fit 640 - CJA - KMP ICS1 Mod 1 TDA2 - CJA - Modified KMM ICS2 TDC - CJM - KMM ICS3 ALFA - Big ship fit ICS3 BRAVO - Frigate and Destroyer fit ICS3 CHARLIE - Small ship fit ICS3.5 - HMS Collingwood training fit
FM12	1. 2. 3. 4.	MF Manual D/F receiver and set Fitted in MCO on many ships 42 kHz to 1060 kHz Being replaced by FM16
FM16	1. 2. 3.	Auto/Manual MF D/F receiver and set Fitted in MCO of many ships although in a very few cases, it was fitted on the bridge/chartroom. On Type 21 frigates it was fitted in the EWO 250 - 550 kHz
FSA1	1. 2. 3.	Frequency standard ICS1 Supplied 100kHz to CJA/TDA: 1MHz to 641: 5MHz to FTA and 100 kHz to CMD
FSA2	1. 2.	Frequency standard Fitted in submarines (SSBN's)
FSA3	1. 2. 3.	Frequency standard ICS1 Mixed Fit Supplied 100kHz to CJA: 1MHz to 640 and 641: 5MHz to FTA2
FSA4	1. 2.	Frequency standard Fitted in submarines (SSBN's)
FSA5	1. 2. 3.	Frequency standard ICS2 Frigates Supplied 1MHz to TDC, CJM ,641 and SCOT: 5 MHz for FTA1 and LINK 10 (DATA LINK)
FSA6	1. 2. 3.	Frequency standard ICS2 large ships As above but not 641 (if fitted)
FSA7	1. 2. 3.	Frequency standard Fitted in small craft having a 642 with a CJM and FTA Supplied 1MHz 641 (or 642) CJM and 5MHz to the FTA
FSB	1. 2. 3.	Frequency standard Older ships Supplied 1MHz to 640: 100 kHz to CJK or CJA
FSD1	1.	2 Frequency standards - 1 distribution panel - 1 up-converter and 1 multicoupler
FSD2	1.	Same as above but with no multicoupler
FTA1	1. 2. 3.	Frequency up-converter Fitted with CJM - externally and with Normal/Emergency power supply arrangements 7kHz to 2.2 MHz into aerial line 3
FTA2	1. 2. 3.	Frequency up-converter Fitted with CJA - internally into the CJA(1) cabinet. Power supply from CJA cabinet 7kHz to 2.2MHz into aerial line 3
FTA3	1. 2.	Frequency up-converter Fitted in submarines (SSBN's)
FTA4	1.	Similar to FTA(1) but modified to achieve low magnetic signature for use in MCMV's
FU4	1. 2. 3. 4. 5.	UHF/DF equipment Fitted in carrier and ships controlling aircraft (not compulsory) 225 - 400 MHz A two channel shipborne equipment together with polemast aerial Replaces FU1
HYBRID	1.	Socket sited alongside CCX Upper in MCO for Secure Net Alongside Communications
HYBRID (Triple or Double Drive)	1. 2. 3.	Used to combine the outputs of three ICS drive units into one output without intermodulations, suitable for driving one WBA Fitted in ICS ships wired for Triple and/or Double Drive Has an attenuation effect depending on frequency, but as a general rule 110 Watts per drive when the Hybrid is connected for triple
KKA1	1. 2. 3.	Covered voice system - 1 BID 150 with 3 users Fitting - FF and above. NORMAL ships fit except LPH/LPD Used with UHF 692/CUJ or in certain RFA's 691/CUH
KKA2	1. 2.	Covered voice system - 2 BID 150's fitted separately with 6 users Fitted as NORMAL fit for LPD's and LPH's in Ops Room. Used with 692/CUJ
KKA3	1. 2.	Covered voice system - 2 BID 150's fitted in standard cabinet with 6 users Not usually fitted at sea
KKA4	1. 2.	Covered voice system - 1 BID 150. Similar to KKA1 but modified to achieve a low magnetic signature Fitted in MCMV's
KKA5	1.	Covered voice system - Enables KY8 to be used in lieu of BID 150
KKB	1. 2. 3.	Covered voice system - KKB is normally suffixed with a figure denoting similar systems to those of the KKA series. Fitted in LPD/LPH Assault Ops Rooms Uses Army VHF Equipment C42
KMM	1. 2.	Control system with a CMD Fitted in ICS1 and ICS2 ships
KMP	1. 2.	Control system without a CMD Fitted in ICS1 and ICS2 Mixed Fit ships
KMV	1.	Provides facilities for monitoring and remote control of communications equipment in MCMV's
KMU1	1.	Distribution and Supervisory equipment in ICS3 Cruiser CAH
KMU2	1.	As above but in frigates and destroyers
KMU3	1.	As above but in HMS Grenville and Training Establishments
KMU4	1.	As above but in ICS3 RFA's
KMU5	1.	As above but in ICS2A Batch 3 Leanders
KRB	1.	See UK.SSC-002
Monitor Cabinet	1. 2. 3.	Contains a CJA, TDA and Test/Switch unit. Primary operators use is for EZ filter tuning ICS1 As for normal CJA/TDA
Monitoring Assembly	1. 2. 3.	Contains a CJM and a TDC with Test/Switch unit. Primary operators use is for EZ filter tuning Fitted in early ICS2 ships As for normal CJM/TDC
OA Group Deck Insulators	1. 2. 3.	Used normally with wire RX aerials. Uses a transformer which gives an output of 15 kHz to 1.5 MHz and the pick-up of the LF/MF wire aerial is increased by a factor of 10 by connecting the transformer into the aerial line Fitted in older type ships with EAL and in modern ships with EZ4 for FTA LF input line 15 kHz to 1500 kHz
ODG	1. 2.	An emergency diesel generator Fitted in most ships - frigates and above excluding DLG's, for limited supplies should all switchboards fail to supply primary power
PCU	1. 2.	Parallel Keying Unit. Can key up to a maximum of 5 transmitters simultaneously for MRL's TF/TG Broadcasts etc Fitted in most standard fits
PSDR	1.	Panel Signal Distribution Radio - Designed to replace the Monitor Cabinet in the later ICS ships. It allows any operational TDC to be used to tune the EZ suppression filters
PRC001/002	1. 2. 3.	FM hand portable operating in the IMM band. The 001 is operated by speaking/listening direct into the MIC/Loudspeaker. The 002 is identical but is operated from extended microphone/Loudspeaker facility. The standard short range portable (SSRP) of the Fleet. Virtually all ships and craft Channel 1: IMM Channel 8 (156.4MHz) in all cases. Channel 2: IMM Channel 13 (156.65MHz) in all cases except that in sets supplied to Minehunters/Minesweepers and MCM Support Vessels this channel will be crystallised for operating on 156.525MHz (IMM Channel 70). This frequency is intended as a separate common channel for 'sweeping' ops. Channel 3: IMM Channel 16 (156.8MHz) on Submarines, Minehunters, Minesweepers, MCM Support Vessels. Frigates and above have channel 3 as a private channel of their own. It is import to understand that many ships share their private channel with other ships and therefore must use callsigns when in company with one another. Also that half the Navy share this channel with commercial users (1 to 28 series). The other half share channel three with commercial users of IMM Channels 60 to 88. Golden rule: consult ALRS VOL 6 and STORNO DCI before using channel 3.
PRC003/004	1. 2. 3.	As for PRC 001/002 but these sets are INTRINSICALLY SAFE (IS). This means that the sets may be operated in the immediate vicinity of explosive gases. Fitted in a great number of RFA's Channel 1: IMM Channel 8 - Channel 2: IMM Channel 13 - Channel 3: All private channels but with sharing as in 001/002 above.
PTR 170	1. 2. 3. 4.	Airborne UHF 225 - 399.9 MHz 12 crystal controlled channels 2 Watts
PTR 171A	1. 2. 3. 4.	Shipborne UHF 225-399.9 MHz. 1750 Channels with 100 kHz spacing 19 pre-set Channels. Manual facility. 16 Watts
PTR 172	1. 2. 3. 4.	Airborne UHF 225-399.9 MHz. 3500 Channels with 50kHz spacing Manual or 18 pre-set Channels with Guard (243MHz) facility 16 Watts
PTR 174D	1. 2. 3. 4.	Airborne VHF/UHF 117.5 - 135.95MHz and 225-399.9MHz. Channels 370 on VHF and 3500 on UHF with 50 kHz channels spacing Manual or 18 pre-set channels with Guard (121.5 MHz VHF and 243MHz UHF) facilities 16 Watts
PTR 175	1. 2. 3. 4..	Airborne VHF/UHF 117.5-135.9MHz and 225-399.9MHz. Channels and spacing same as above for PTR 174D Channels pre-set and Guard facilities as above for PTR 174D VHF 3.5 Watts AND UHF 16 Watts
PTR177	1. 2. 3. 4..	Airborne VHF/UHF (DATA) 117.5 - 135.05 MHz and 225-399.9MHz. Channels 370 VHF. 3500 ON UHF Voice (50kHz spacing) but reduced on UHF for FSK (DATA) working when spacing is increased to 100 kHz. Manual or 18 pre-set Channels but NO GUARD facilities. VHF 3.5 Watts and UHF 16 Watts
PTR 374	1. 2.	Airborne VHF/UHF Same as PTR 175
PTR 377	1. 2. 3. 4..	Airborne VHF/UHF (DATA) 100-156 MHz and 225-399.9MHz. Channel spacing 100kHz for DATA, 25 OR 50kHz for Speech. 9240 Channel available. Manual or 19 pre-set Channels with Guard facilities on both V and UHF VHF 10 Watts, UHF 20 Watts
QE Box	1. 2.	Quadrantal Error Box. Proper name is "Aerial AUX Box". Fitted in ships having both the FM16 and the SQA fitted
QYA2	1.	LORAN
RCS Exchange	1. 2.	Remote Channel Selection. Provides plugging facilities from specified 692/CUJ to specified user position fitted with an RCS selector e.g. Helo Controller. Fitted widely. Associated with 692/CUJ - must have a Design 90 fitted and must be connected to UHF CAW EAG/H/J
RIS6	1. 2.	Radar Interference Suppressor. Associated with the CUJ. Fitted on ships having a Type 965 Radar System
RIS7	1. 2.	Radar Interference Suppressor for VHF Fitted with the new V/UHF equipment i.e. 1203 in ships with Type 965 Radar Systems
ROX	1. 2.	Receiver Output Exchange. Has an Upper to which all receiver outputs are fed, and a Lower to which all user equipments are fed. Thus, the output of any V/L/M/HF receiver can be 'married' to a transmitter, BSU's, RX Lines etc. Most standard fits
RLR's (Relay Racks)	1. 2.	Normally sited in the Ops Room. CCX Lower plugs terminate in the RLR and by plug in relays routed to Ops Room in a pre determined sequence. Ops Room selection by VCS 200 series Fitted in frigates and above
RWA	1. 2.	Tactical and Broadcast RATT outfits Fitted virtually in all ships
RWB	1. 2.	Tactical and Broadcast RATT outfits with a security box (BID 580 or BID 660) Used for training purposes but some New Commonwealth Navies are fitted
RWC	1. 2.	Tactical and Broadcast RATT outfits Fitted in Polaris Submarines
RWE1	1.	RATT and message processing equipment for ICS3 Cruiser CAH
RWE2	1.	As above but for ICS3 frigates and destroyers
RWE3	1.	As above but for ICS3 in HMS Grenville and Shore Training Establishments
RWE4	1.	As above but ICS3 in RFA'S
RWF	1.	RATT equipment for MCMV's excluding crypto terminal equipment
SPA	1. 2. 3.	Selective Calling and Responding outfit. Provides coded selective calling and responding facilities between stations on either a line or radio path. The outfit employs a four digit code to provide 1000 addressees. Each station using the outfit is also capable of making a simultaneous non-selective call to all other stations on the network. Fitted in non-continuous-watch small craft and in larger ships. Facilities are built into the ICS2 CMD for a dial system to be used for the SPA
SQA	1. 2. 3.	An automatic alarm receiver fixed tuned on a centre frequency of 500 kHz. Normally associated with the FM16 but is fitted with the FM12 in certain ships Fitted widely 496-504 kHz
SRC	1. 2.	Selector Radio Channel. Normally fitted within a VCS (Versatile Console unit) (VCS200). Gives an Ops Room user selection of normally 10 CCX lower lines via the RLR Fitted in ICS2 and some ICS1 Modified ships
SUR	1. 2.	Switch Unit Radio. The TX Control in RWA Tactical Ships having RWA/B/C
SUT	1.	A radio telephone bay providing facilities for the connection of a HF and/or UHF radio link to a shore telephone system. Provides ships with access to MOD and Post Office (via MOD) telephone networks
TCU	1. 2. 3.	Transmitter Control Unit. Routes the AF from user to TX Fitted in ICS1 MOD 1 and ICS2 ships. One TCU per ISB channel. Fitted in ICS1 ships. Two TCU's per ISB channel
TDA1	1. 2. 3. 4..	Transmitter drive unit. Delivers the required RF plus/minus the required modulation at low level (mW) to a wideband amplifier Fitted in ICS1 and ICS1 MOD 1 ships 240 kHz to 23.9999 MHz 50mW above 2MHz - 25mW below 2MHz
TDA2	1. 2. 3.	MF/HF Transmitter drive outfit for ICS1 & ICS1 MOD 1 ships. Performs the same function and utilises the same pattern cabinet as outfit TDA1 but employs solid state circuitry instead of thermionic. Introduced as a direct replacement for outfit TDA1.
TDC	1. 2. 3. 4..	Transmitter drive unit. Delivers the required RF plus/minus the required modulation at low level (mW) into a wideband amplifier. Fitted in ICS2 ships Depends on amplifier fitted but generally 240 kHz to 24 MHz 100 mW
TDD 1	1. 2.	HF/MF drive assembly embodying 5 identical USB drive units and an associated drive combiner unit. Provides 3 outputs. ICS 3 ships
TDD 2	1.	Similar to TDD1 but with combiner unit providing 4 outputs
TDD 3	1.	HF/MF drive assembly embodying 4 identical USB drive units and an associated drive combiner providing 3 outputs
TDD 4	1.	HF/MF drive assembly embodying 2 identical USB drive units and 1 LSB drive unit together with an associated drive combiner providing 2 outputs
TDD 5	1.	HF/MF drive unit assembly embodying 3 identical USB drive units and an associated drive combiner providing 3 outputs
TDD 6	1. 2.	HF/MF drive assembly embodying 3 identical USB drive units and an associated drive combiner providing 2 outputs For use with the WBD outfit series
TDD 7	1.	HF/MF drive assembly embodying 3 identical USB drive units. It provides 2 outputs with tuning initiation control for 2 aerial tuning outfits ETG(1) and 1 output for aerial tuning outfit ETB
TG Series	1. 2. 3. 4. 5.	TG followed by a letter (TGA for e.g.) indicates the various types of teleprinters used in the Fleet. TGJ - Broadcast bay semi-electronic teleprinter TGK1 - ICS 3 high speed electronic teleprinter dot matrix printing head. TX and RX using high AF tone signalling TGK2 - ICS3 receive only version of TGK1. Can also use D.C. TGK3 - ICS3 similar to TGK1 but uses a 1kHz tone
THE 4	1.	Ancillary equipment for use with BID660 to enable operation with ship alongside covered line working
TLA1	1. 2. 3.	Literaliser equipment. Processes encrypted output of BID 660 Fitted in ships with BID660 in MCO's, SCYO's and Shore Commcens May be used as normal autohead and is replacing Type 6S6 in some bays
TLA 2	1.	Similar to TLA1 but with low magnetic signature for use in MCMV's
TTVF(T)	1. 2.	Terminal Telegraph Voice Frequency (Tactical) Used in RATT outfits for TX/RX of RATT signals
TTVF(B)	1. 2.	Terminal Telegraph Voice Frequency (Broadcast) Used in RATT outfits for the receipt of RATT Broadcasts
TT10	1. 2.	Terminal Teleprinter - is fitted on RATT Tactical bays to convert DC pulses to Tone on/off and vice-versa Fitted widely on ships with RATT systems
TT11	1. 2.	Terminal Teleprinter - is fitted on RATT Broadcast bays to convert Tone on/off into DC pulses Fitted widely on ships with RATT systems
TT12	1.	Fitted to convert Tone on/off into DC pulses on ships having a SATCOM terminal SCOT/SKYNET 5
TT13	1.	Fitted in submarines in the AN/UGA system converting high speed Morse to RATT signals.
TT14	1.	Fitted to convert one level of DC pulses to another level of DC pulses in ships engineering cabin for SATCOM
TT20	1.	Two fitted together form the TTVF(B). Converts Tones to 1kHz on/off mostly for the reception of RATT Broadcasts.
UHF Trainer - Switch box and RX Isolating	1. 2.	Designed to train Ops Room users on voice technique. Special plugs plug into the CCX Upper and the CCX Lower use plugs into the back of a special plug. The associated UHF RX is isolated from the CCX Upper, thereby allowing the MIC lines of the special plug to be directly connected to the RX Lines of the special plug Fitted as required or requested
UK/SRA101	1. 2. 3. 4..	An aerial developed for reception and fed into the EZ system. Used when there is little or no room to fit the desired AWN aerial. Fitted on IKARA Leanders and certain other new fits. Top loaded monopole Height 7' 8.5" - total diameter 4' 6"
UK/SRA102	1. 2. 3.	Designed to replace the AJE for UHF TX/RX operations Fitted widely, the first ships to get it were the Type 42's Looks exactly like an AJE
UK/SSC001	1.	SKYNET 5 ship station
UK/SSC002	1.	SCOT ship station. Covers all units within the system
UK/SSC003	1.	Shipborne satellite communications terminal with speech capability (SCOT 2)
UK/UGC608	1.	12 channel TDME equipment for SCOT
UK/UCC609	1.	SKYNET 5 Line Modem equipment
UK/URC610	1.	SKYNET 5 SSME
UK/UCC611	1.	SKYNET 5 Speech plus 3 telegraph channels FDME (Frequency Division)
UK/UGC612	1.	SKYNET 5 3 Telegraph channels TDME (Time Division)
UK/URC613	1.	SKYNET 5 - 1 Megabit/Sec phase shift modulation/code division multiple access (CDMA) equipment
UK/URC614	1.	SKYNET 5 - 10 Megabit/Sec phase shift modulation/code division multiple access (CDMA) equipment
WBA	1. 2. 3. 4.	Wideband amplifier Fitted in ICS1 and some ICS2 ships 1.5 to 24MHz Up to 1000W
WBB	1. 2. 3. 4.	Wideband amplifier Fitted in ICS1 and ICS2 ships 240kHz to 24MHz 500W with ETB. 1000W with EAW/ETA if above 2MHz when using TDA - if below 2MHz then 500W
WBC	1. 2. 3. 4.	Wideband amplifier Fitted in Submarines (SSBN's) and some ICS2 ships 2 to 28MHz. Has limited MF capability. Up to 1000W (Normal MODE 1)
WBD	1. 2. 3. 4.	Wideband amplifier Fitted in ICS3 ships 240 kHz to 28 MHz 1000W from 500 kHz to 28 MHz - reduced power down to 240 kHz
WBD1	1. 2.	Wideband amplifier Comprises of 2 identical 1kW HF/MF amps and an associated heat-exchange assembly
WBD2	1. 2.	Wideband amplifier Similar to WBD1 but incorporating only 1 amp assembly
YBC1	1.	A 1 line cabinet outfit for use with transceivers Types 1203(1) to 1203(8) inclusive
YBC2	1. 2.	A 2 line cabinet for the 1203 series Restrictions are such that only 1 of the 2 equipments housed in this cabinet may be of the V/UHF variety i.e., 1203(1) to 1203(4) inclusive
YBC3	1. 2.	A 3 line cabinet for the 1203 series Restrictions are such that only 1 of 3 equipments housed in this cabinet may be of the V/UHF variety i.e., 1203(1) to 1203(4) inclusive
YBC4	1.	A 2 line cabinet outfit similar to YBC2 but adapted for use in MCMV's with transceiver Type 1203(9)
YBK	1. 2. 3. 4. 5. 6.	ICS3 ancillary items YBK1 - This outfit incorporates ancillary items required for ICS3 in Cruiser CAH. The major items involved are : power unit for the aerial base tuner - aerial base tuner changeover unit - 100W HF/MF amplifier - transmitter dummy load with switching - input hybrid unit - output hybrid unit - man aloft facilities for transmitting aerials. YBK2 - Similar to YBK1 but modified for use in Types 22 and 42 YBK3 - Similar to YBK1 but modified for use in the trials ship and shore training establishments YBK4 - Not allocated YBK5 - This outfit incorporates ancillary items required for ICS2A. The major items involved are the same as those mentioned above for YBK1
YBO1	1.	To provide accessory speech equipment for use with UK/SSC003 (SCOT 2) excluding associated crypto equipment
YBU1	1. 2.	A pair of 6-drawer cabinets each fitted with the power unit required to energise automatically tuned multicoupler drawers EBA1 Will house up to 12 multicoupler drawers. These may be any combination of outfits EBA1 and EBA2
YBU2	1. 2.	Similar to YBU1 but not fitted with power drawer units For use with outfit EBA2 only. Will house up to 12 drawers
YBU3	1. 2.	A pair of 3-drawer cabinets each fitted with the power unit required to energise automatically tuned multicoupler drawers (EBA1) Will house up to 6 multicoupler drawers. These may be any combination of outfits EBA 1 and EBA2
YBU4	1. 2.	Similar to YBU3 but not fitted with power units For use with outfit EBA2 only. Will house up to 6 drawers
634	1. 2. 3. 4.	A UHF man portable having 6 preset channels Widely allocated throughout the Fleet 240 to 300 MHz 2 Watts
635(1) & (2)	1. 2. 3. 4.	A HF portable transceiver Widely fitted in the Fleet 2 to 8 MHz 635(1) up to 3 Watts : 635(2) up to 30 Watts
638	1. 2. 3. 4. 5.	MF/HF Lifeboat transceiver Carried on virtually all ships. Replaced the 629 Transmits on 500, 2182 and 8364 kHz and receives on 500, 2182 and 8200-8800 kHz Varies with modulation/emission - up to 3.5 Watt output No longer manufactured - being replaced by 1251 (1)
618H	1. 2. 3. 4. 5.	HF low power transmitter Widely fitted 1.5 to 16 MHz 40 Watts Not many remaining - replaced by 641 or 643/CJP
618L	1. 2. 3. 4.	MF low power transmitter As above for 618H 330 - 550 kHz 15 Watts
619	1. 2. 3. 4. 5.	HF low power transmitter Fitted widely in MCMV's and in other ships too 1.5 to 16MHz 40 Watts Not many remaining - replaced by 643/CJP
640	1. 2. 3. 4.	MF/HF medium power synthesised transmitter ICS1 Mixed Fit (ICS2 Mixed Fit although rare!) and older ships 240 kHz to 24MHz Up to 500 Watts
641	1. 2. 3. 4.	HF low power synthesised transmitter (TDC) and MF/HF synthesised receiver (CJM) Some frigates and above to replace 618/CAS as emergency TX/RX TX 1.5 TO 24mhZ : rx 240 to 525 kHz and 1 to 28 MHz 100 Watts
643 (1)(2)(3)	1. 2. 3. 4..	HF low power synthesised transmitter Fitted in small ships to replace 618/619 as the main transmitter - frigate and above in lieu of 618/619 as emergency transmitter 1.5 to 24 MHz 100 Watts
689	1. 2. 3. 4. 5.	A VHF IMM transceiver. 28 preset channels with 25 kHz spacing. Widely fitted in the Fleet. Not normally on MCMV's and not in submarines. 156 - 162 MHz Low power 200mW. High power up to 12Watts Being replaced by 1202
691	1. 2. 3. 4. 5.	A low power UHF transmitter. 10 preset channels if used on NORMAL. 9 preset channels when used on ALTERNATIVE. Fitted widely in frigates and above 277 to 283 MHz 10 Watts Being replaced by Type 1203 transceiver
692	1. 2. 3. 4. 5.	A low power UHF transmitter. Has 1750 frequencies available but only 10 channels can be pre-programmed Widely fitted in the Fleet 225 to 399.9 MHz 10 Watts As for 691
693	1. 2. 3. 4. 5.	Same as 692 but with an added amplifier Very few fitted. Normally found in aircraft carriers of air direction ships Same as 692 Up to 150 Watts As for 691
696	1. 2. 3. 4..	A low power UHF transceiver Fitted widely in submarines and MCMV's and also in one or two ships 225 to 399.9 MHz Up to 14 Watts
6S6	1. 2.	An autohead used for RATT transmissions Widely fitted in ships having RWA/B/C
1202(1)	1. 2.	A VHF FM transceiver for simplex and duplex operation within the frequency band 156 to 163 MHz Replaces Type 689
1202(2)	1.	Same as 1202(1) but fitted in MCMV's
1203(1)	1. 2.	A V/UHF transceiver incorporating a 20 Watt UHF and 10 Watt VHF band - 225 to 400 MHz and 156 to 163 MHz For use in CAW role and providing remote channel selection (RCS) facilities
1203(2)	1.	Similar to 1203(1) but no RCS
1203(3)	1. 2.	Similar to 1203(1) but for use in non-CAW role Used in conjunction with cabinets YBC1,2 or 3
1203(4)	1.	Similar to 1203(2) but for use in non-CAW role
1203(5)	1.	A UHF only version of 1203(1)
1203(6)	1.	A UHF only version of 1203(2)
1203(7)	1.	A UHF only version of 1203(3)
1203(8)	1.	A UHF only version of 1203(4)
1203(9)	1.	Similar to 1203(8) but adapted for MCMV's
1250(1)	1. 2.	An HF 100 W emergency TX/RX ICS3 ships
1250(2)	1. 2.	Similar to 1250(1) but fitted with alternative interface unit to provide remote control ICS3 ships
1251(1)	1. 2. 3.	MF/HF TX/RX Distress equipment Fitted widely Replaces Type 638
ARMY KIT		The Army denote their equipments by using 3 letters and 2 figures, viz, SR A13. The 'SR' in all cases means STATION RADIO. The next letter A-E represents the power output, where A=0 to 10 watts; B=10 to 100 watts; C= 100 watts to 1kW; D= 1 to 10kW and E= In excess of 10kW. Finally, the figures represent a frequency range, where 10-39= 300kHz to 30MHz; 40-69= 30MHz to 3GHz and 70-99= Above 3 GHz.