The following 'systems' are not finite.  What is included is to demonstrate how various equipments were controlled.

This Series {now in addition to CCS and CWS} was fitted in the late war years to enable British and American transmitters and receivers to be used remotely.  However, it did not handle VHF transmitters and tended to differ widely in facilities offered between ships.  Like all war fits, it was a necessary expedient and people accepted it, "warts and all". It continued using what the CWS had started, namely the CCX [Control Circuit Exchange], a plug and socket matrix, supported by an assortment of various control boxes at each and every remote user position. To avoid boring you, instead of mentioning each and every 'little box of tricks' we will show you, in the KH Series section which is on the next page, some photographs of these typical control boxes.

The basic facilities enabled each remote position to:-

{a}.   Switch on and off the transmitter
{b}.   To key the transmitter in W/T
{c}.   To transmit R/T
{d}.   To receive

or {a} {b} and {d}, or {a} {c} and {d}, or {c} and {d} only.

There were two entirely separate systems for W/T and R/T
{a}.   For W/T, a circuit exchange {CCX} system which enabled a remote position to:-
{i} Key the transmitter
{ii} Switch on and off the transmitter
{iii} To receive
{b}.   For R/T, each transmitter is wired to a socket unit to which a receiver can be connected.  Each socket  unit has 3 output sockets for connecting to remote circuits.

This Group covered KCH to KCP  shown as follows:-

KCH Capital ships and cruisers not fitted with CWS 60EQR, 60FR, 89M/P/Q, 601/2E/3/4, 57DMR/DR, 59D, TAJ, TBK, TBM, TCS Completes {hitherto piecemeal} ships remote control system for all transmitters and receivers
KCJ Cruisers and above 604, TAJ, TBK or TBL Remote control for a single line transmitter and receiver



Light craft with a main and 2nd office e.g., Squadron Leader.
Light craft with a main W/T office only and where a W/T control circuit  exchange is not required e.g., Fleet Destroyer
Light craft  where no W/T control is required e.g., Sloops
49MR, 50MR, 60EQR, 60FR, 89M/P/Q, 601/2E/3/5, TAJ, TBK, TBL, TCS. As for KCH
Cruisers and above with CWS
Cruisers and above NOT fitted with CWS
60EQR, 60FR, 601/2E/3/5, 89M/P, TBM As for KCJ
KCP Cruisers and above 60EQR, 602E or TCS fitted in BWO Remote control  for a single transmitter-receiver outfit @ ADR [AIR DIRECTION ROOM] and Compass Platform
KCW Light Fleet Carriers [1942 programme] As for KCH As for KCH
KCY Control Target Boats 86M, TCS Completes {hitherto piecemeal} boats control outfit

and to cope with the "new fangled V/UHF kit" - the TBS - the Series was continued to KCQ - KCU  as follows:-

Aircraft Carriers
Capital ships, Cruisers, AA ships and Monitors
TBS Remote control for two types TBS
KCS Depot ships, fast Minelayers, Squadron Leaders and below TBS Remote control for a single TBS
KCT HMS Vanguard's one-off fit TBS Remote control for three types TBS
KCU Squadron Leaders and Fleet Destroyers TBS Remote control for two types TBS

This series KCQ - KCU, provided facilities for switching on the motor generator providing transmitter HT with lamp indication that the generator was running correctly, and thereafter, control of the transmitter for R/T and the  receiver.

During WW2, aircraft came to the fore and were a major contributor in winning it for the Allies.  Communications with fighter aircraft [in particular] in direct support of the Fleet was a pre-requisite, and radio communications between ships and the aircraft were paramount to the success of the air asset.

This brought into being the KF Series {easy to remember K = Control <they couldn't use 'C' because it was already assigned for other communication purposes> and F = Flying} and the series consisted on KFC-KFG  as follows:-

KFC This was widely fitted ashore in Royal Naval Air Stations [RNAS] and was still going strong almost up to and including 1980.
KFD and KFE These were the very first R/T control systems fitted in ships for fighter direction.  KFD allowed 6 channels with 3 controlling positions and was fitted into A.A. ships and above, except carriers and fighter direction ships. KFE, a much bigger affair, supplied 12 channels with 6 control positions and was the main fit in carriers and fighter direction ships.  It was possible to increase this number of channels by a further 10 positions in the OPS ROOM.
KFF and KFG Were later updates for the KFD and KFE respectively above,  and modernised the Fleet Air Arm working spaces by fitting them with their own CCX's.
KFJ Was fitted into carriers and was used as CCA.  It enabled 4 controllers, each on a separate channel to converse with the pilot of an aircraft during his approach. This is what the block diagram of a KFJ system looked like Click to enlarge

Towards the end of WW2, the Admiralty designed a brand new system which would give to any user in the ship notwithstanding, the ability to use any piece of W/T equipment at their place of duty.  However, since the FAA were well served with KFF [non carriers] and KFG [carriers] a change to a new system had to take account of their well proven and established system.  The Admiralty introduced the KH System, parts of which contained the now 'old' KFF and KFG systems.