The terrain will also influence use of wire communications. Wire laying may be difficult in dense vegetation, in swampy areas, or in mountainous terrain. Rain, snow, and temperature extremes may also influence wire laying. Men and equipment to lay wire lines should be available. Unlike other infantry communications, messengers are a means of transmitting large maps, documents, and bulk material, as well as oral or written messages.
Message centers serve as a central point for receiving and distributing message-type information.
They are located at battalion or higher level headquarters. It speeds the exchange of messages and helps avoid errors. The rules listed below will help you use transmission times efficiently and avoid violations of communications security. Transmit clear, complete, and concise messages. When possible, write them out beforehand.