Morse Code
Although the Morse code has, theoretically, ceased to be used with
the fmal implementation of the G MD SS, there are still some radio stations
that use the Morse code to identify their transmissions (e.g. free telex
working channels (see Chapter 9).
A. - B C -. -. D - .. E F
G - -. H I J. - -- K -. - L. - ..
M-- N -. 0 --- P. - -. Q --.- R
S T U .. - V W· -- X - .. -
y -. -- Z - - ..
1 .---- 2 .. --- 3 ... -- 4 .... - 5
6-···· 7--··· 8 9----· o -----
For example - when trying to identify a free telex channel for
Oostende Radio (frequency and radio Callsign (OST) from ALRS Vol. 1
you would listen out for the 'chirp' signal, interrupted by the Callsign
- •.• - (OST); and for Cape Town Radio (frequency and radio callsign
(ZSC) from ALRS Vol. 1) you would listen out for the repetitive phasing
signal, interrupted by the Callsign - - •• -. -. (ZSC).
- •.• - (OST); and for Cape Town Radio (frequency and radio callsign
Voice Procedure Words
There are many 'pro-words', recognised internationally, used in
voice communications to aid/clarify understanding. The following are
the most common:
Correction
Used to correct a mistake in the spoken message, e.g.
'Ivanhoe this isJustina - my position is 55 degrees - Correction - 53
degrees 25 minutes North '
Say again
Used to ask for a repetition/part of a message and is used together
with: 'Word after', 'Word before', 'All after', 'All before', 'All between',
e.g. ']ustina this is Ivanhoe, Say again all after position, over', and the
reply would be: this isJustina - 'I say again' (Word after/Word before/
All after! All before/All between) e.g. 'Ivanhoe this isJustina - 1 say again,
all after position - 53 Degrees 25 minutes North "I say again' may
also be used, without prompting from the receiving station, to aid
reception - especially if conditions are poor, e.g. this is Justina -
position 53 degrees 25 minutes North - 1 say again - 53 degrees 25
minutes North '
222 THE NAUTICAL INSTITUTE