Although the " message separator " prosign is quite often used informally by amateur radio operators, its use is unwarranted in casual, informal Morse conversations.
42.
The " "'understood " prosign "'is intended to be used by receiving operators to respond to requests from a transmitting operator.
43.
For those Q-code assertions that merely need to be acknowledged as understood, the usual practice is to respond with the prosign or which means " understood ".
44.
Illustrative written delineation of ( potentially non-unique ) character groups concatenated to create unique prosign symbols is effected by specially annotating the otherwise normal-looking character groups.
45.
This unique prosign represented by two concatenated literal " A " characters indicates the point of initiation of a " new line " in a formal written text message.
46.
Prior to the adoption of the distress prosign as an International Morse distress signal in the early 1900s, the Marconi Company used the signal CQD as a Morse distress signal.
47.
The dot / dash sequences shown in the second column titled " Code Symbol " comprise the " unique dot / dash sequence definition of each prosign ".
48.
The single exception to the uniqueness of prosign symbols is the alphabetic character " K ", which is used both as an alphabetic character symbol and alternatively as a prosign symbol.
49.
The single exception to the uniqueness of prosign symbols is the alphabetic character " K ", which is used both as an alphabetic character symbol and alternatively as a prosign symbol.
50.
The " wait " prosign is often used by Morse code " amateur radio net control operators " when acknowledging specific stations checking into a Morse code network.
