RM = Radioman RD = Radarman
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In reply to:
Re: My Grandfather and Great Uncle
MICHAEL HIGGINS 1/05/09
as a R.M. 3rd Class (assumed to mean Radarman 3rd class)
RM was a Radioman
RD is a Radarman,there were two more ratings established in 1943, Radarman and Sonarman.
Good luck,
James