communication instructions radio telegraph procedure
communication instructions radio telegraph procedure
communication instructions radio telegraph procedure
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UNCLASSIFIED ACP124 (D)<br />
215. DUAL PRECEDENCE<br />
Multiple address messages having both action and information addressees may either be assigned<br />
a single precedence, in which case it indicates the precedence for all addressees, or they may be assigned<br />
two precedences, one precedence for all action addressees and a lower precedence for all information<br />
addressees. The <strong>procedure</strong> for indicating dual precedence in the heading of plaindress and codress<br />
messages is as follows:<br />
a. Plaindress. Both precedence prosigns, separated by the separative sign, will appear as<br />
the first element of the preamble; the higher precedence will appear first.<br />
UNCLASSIFIED 2-10<br />
EXAMPLE: (Immediate to action addressees and Routine to<br />
information addressees.)<br />
NPQR DE GABB<br />
-O-R-061217Z JUL 83<br />
-FM GABB<br />
- TO NPQR<br />
- INFO M9VO<br />
NPQT<br />
Z3P0<br />
__<br />
BT<br />
b. Codress. Both precedence prosigns, separated by the separative sign, will appear as the<br />
first element of the preamble; the higher precedence will appear first. However, when a message is<br />
routed to a crypto guard which serves all the addressees, the higher precedence prosign only will be<br />
included in the preamble. The lower precedence will be included in the encrypted text in the form "…<br />
(lower precedence) for information addressees".<br />
c. Codress Transmission Instructions. A separate heading will be prepared for each<br />
transmission of a dual precedence codress message in accordance with subparagraph 210a. Any<br />
station(s) or addressee(s) included in the heading of the message who is/are to receive the message at the<br />
lower precedence (i.e. information addressees or stations having to serve information addressees) will be<br />
indicated in the transmission <strong>instructions</strong> by means of an operating signal ZOT "Transmit or handle this<br />
message at the lower precedence to the station(s)/address designator(s) which follow"), followed by the<br />
identification of the station(s)/addressee(s) concerned. The absence of the operating signal automatically<br />
indicates that the message is to be handled at the higher precedence by all stations. If T <strong>instructions</strong> are<br />
specifically included and the transmission <strong>instructions</strong> become long or complicated, those stations for<br />
whom the message is intended at the lower precedence may be collated and shown together after<br />
operating signal ZOT. ZOT will then be inserted after the last T addressee designation.<br />
EXAMPLE 1: (GABB directs NPQR to transmit the message at the lower<br />
precedence to C2S6.)<br />
NPQR DE GABB<br />
-ZOT C2S6<br />
- P - R - 141816Z JUL 83<br />
GR71<br />
BT etc.
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