The main LF/MF Fleet receiver from the early 1960's and fitted in all ICS1 [STANDARD 3A] ships/submarines and also in ICS 2 ships [STANDARD 3C].  It was also fitted into Mixed Fits and thus into STANDARD 3B and 3D ships.

Click here CJD.pdf for a description, here CJD[1].pdf for a picture.

See also the 'COMIST/ICS' scuttle in the TRANSMITTER section matrix.