Position - 01 - Friendly or enemy position, movement or intended movement: position, course, speed, altitude, or destination of 'any air, sea, or ground element unit or force.

Capabilities - 02 - Friendly or enemy capabilities or limitations: force composition or identity, capabilities, limitations or significant casualties to special equipment, weapon systems, sensors, units, or personnel. Percentages of fuel or ammunition remaining.

Operations - 03 - Friendly or enemy operations, intentions, progress or results: operational or logistic intentions, assault objectives, mission participants, flying programs, mission situation reports, results of friendly or enemy operations.

Electronic Warfare - 04 - Friendly or enemy electronic warfare emission control (EW/EMCON) intentions, progress, or results: intention to employ electronic counter-measures (ECM), results of friendly or enemy electronic counter-countermeasures (ECCM), results of electronic warfare support measures (ESM), present or intended EMCON policy, and equip-ment affected by EMCON policy.

Personnel - 05 - Friendly or enemy key personnel: movement or identity of friendly or enemy flag officers, distinguished visitors, unit commanders, and movements of key maintenance personnel indicating equipment limitations.

COMSEC - 06 - Friendly or enemy communications security (COMSEC) locations: linkage of codes or code words with plain language, compromise of changing frequencies or linkage with line numbers, circuit designator linkage of changing call signs with previous call signs or units, compromise of encrypted or classified call signs, and incorrect authentication procedure.

Wrong Circuit - 07 - Inappropriate transmission: information requested, transmitted or about to be transmitted that should not be passed on the circuit because it either requires greater security protection or is not appropriate to the purpose for which the circuit is provided.

MESSENGERS

Messenger service is the backbone of the rifle company communication system and is a backup for both the wire and radio systems. Wire lines maybe cut by enemy fire or by enemy infiltration. Radio communication is insecure and should not be relied upon as the only means of communication; therefore, the foot runner is most dependable. The manner in which messengers are used depends on the tactical situation. Normally, a messenger from each rifle platoon is sent to the company command post. Then, with each displacement, he is replaced with a new messenger. This provides the company commander with a runner who knows the exact location of his parent rifle platoon. One company messenger is located in the battalion command post and is replaced by another upon each company displacement.

Communication by Messenger

When time permits, a message should be written; however, oral messages are often necessary. A complete message must answer the questions of what, when, and where; but a message should be made as brief as possible, omitting words that do not add to the meaning. A written message should be printed in plain block letters; individual letters contained in the message should be spelled out using the phonetic alphabet (as, Zulu for letter Z). The name of the command authorizing the message and the name of the command to which it is being sent must be written in the message. The actual writer of the message must sign his name and rank or rate.

Messenger Training

A combat messenger must be trained carefully in the

following skills:

1. How to deliver messages, either oral or written.

2. How to travel over various kinds of terrain at prescribed speeds.

3. How to use a compass for orientation and direction.

4. How to read maps.

5. How to select routes that provide the best cover and concealment.

6. How to recognize units and command posts with which communication is maintained.