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CQD
CQD
, transmitted in
Morse code
as
– · – · – – · – – · ·
is one of the first
distress signals
adopted for
radio
use. It was announced on 7 January 1904, by
"Circular 57"]
of the
Marconi International Marine Communication Company
, and became effective, beginning 1 February 1904 for Marconi installations.
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