Clock coder (G.B.)
Alternative term: Timer Coder (U.S.A.)
The central control mechanism, either electrical, electronic or mechanical, by means of which the transmission schedule of the radio beacon is determined, and the characteristic code of the station is generated.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM