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Allied Communications Publications are documents developed by the Combined Communications-Electronics Board and NATO, which define the procedures for communicating in computer messaging, radiotelephony, radiotelegraph, radioteletype , air-to-ground signalling , and other forms of communications used by the armed forces of the five CCEB member countries and/or NATO.
Contains information regarding assignments and use of frequencies; means of communications; message preparation; call signs, routing indicators and address groups and method of determining code speeds, message precedence, etc. ACP 121 is primarily for use by originators and communications officers.
Delayed Acknowledgement Environments.
Messaging Services.