| | In Use | Description | Comments |
FH 4 | abt 1943 - 1960's | Early ESM system in RN use. Very few survive but there is one in the Belfast wireless office. | |
RATT BAY WITH B40/B41's | 1950s - 1970's | | A working B40 resides in the EW Museum Collingwood |
UA3 | 1960s - 1983 | I Band radar intercept. UA3(J) provided J band cover | Ships inc, CAT Class in the Bridge Wireless Office (BWO), Mermaid |
UA8 / 9 / 10 | 1960'S - 1980'S | UA8 - EF UA10 -GH UA9 - I | Widely fitted in Leanders, DLG and Tribals (UA9 only) |
3" chaff launcher panel | 1960's-1990's | Distraction/Seduction chaff | Widely fitted |
Type 669 repeater jammer | 1970's | I band Jx | DLG/ some Leanders |
Outfit FH4 | 1950s - 1960s? | Aircraft DF Homing system | Carriers. This example is in the Collingwood museum |
 | 1953 - 1980's | HF Radio receiver | |
UA15 | 1970's | | Fitted in some leanders |
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