Gap coding

From International Dictionary of Marine Aids to Navigation
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4-3-515

Gap coding (in a transponder)

A process of interrupting the response of a transponder into long and short pulses, like the morse code, for recognition purposes.




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