ACP 121(I), COMMUNICATION INSTRUCTORS GENERAL Flashcards
Station and address designators encompass how many different categories?
4
Routing indicators consist of how many types?
2
Plain Language Address (PLAs)/Signal Message Address (SMAs) may not exceed how many characters including spaces?
55
The use of call signs in message texts should be avoided, except in procedure and which other type of messages?
Service
Which type of call signs are used by warships and merchant vessels when transmitting CODRESS messages or other messages requiring security of origination to shore radio stations?
Indefinite
Call signs are authorized for use in which procedure line of the message format?
4
What is a form of military address designator representing a predetermined list of specific and frequently reoccurring combinations of action and/or information addresses?
Address Indicating Group (AIG)
Special Operating Groups (SOGs) are compromised of how many letters and identical in appearance with address groups, are provided for use in the headings of messages to give special instructions?
4
What are primarily station designators and have the fundamental purpose of indicating the communications point of destination to enable correct routing through message relay systems, either manual tape relay, automatic tape relay or computer based systems?
Routing indicators
Which type of designators may not be used in conjunction with call signs or address groups?
Plain language
How many major categories are Address Indicating Groups (AIGs) divided into?
2
Address Indicating Groups (AIGs) should be confined to address compositions of a permanent nature. They are normally composed of how many or more addressees, one of which may be the originator?
10
Which plan has been developed to satisfy the requirement of both strategic/worldwide networks and tactical/ theatre type networks?
Combined Routing Indicator Plan
Routing indicators will consist of not less than four and not more than how many letters, including suffixes?
7
Which type of call signs and address groups are used on insecure nets and links to conceal the identities of stations or messages originators and addressees and so make interception and traffic analysis more difficult?
Secure
