Chapter 2 Voice Communications

CHAPTER 2 VOICE COMMUNICATIONS Upon completing this chapter you should be able to do the following: Identify circuit procedures, discipline, and techniques in voice communications. Describe radiotelephone (R/T) security elements, voice procedures, and basic message formats. Explain the use of R/T call signs, circuits, and nets. Explain the use of R/T executive methods. Identify the use and format for R/T circuit logs. Whether you are ashore or at sea, your professional duties as a Radioman will include radiotelephone (R/T) communications. You should understand that uncovered (nonsecure) radio transmissions are the least secure means of communications, and that R/T voice communications are the least secure of all radio communications. Despite these drawbacks, R/T communications play an important part in our day-to- day fleet operations and in the control of coastal and harbor shipping. CIRCUIT PROCEDURES R/T is the easiest, most convenient method of relaying real-world situation traffic from ship to ship, ship to shore, or shore to ship. All that is necessary is that you pick up a transmitter handset and speak into it. A radiotelephone circuit would quickly become unusable if everyone on the circuit failed to follow the same rules and procedures. Much of what is accomplished over an R/T circuit involves proper techniques and training, coupled with common sense and experience. It is impossible to cover every conceivable situation that may arise when using voice communications. There are many simple R/T procedures that apply to these circuits. CIRCUIT DISCIPLINE Unless using secure voice communications equipment, you must assume that everything you say when using R/T is being intercepted. The inherent dangers of interception can be significantly reduced by adhering to the principles of strict circuit discipline. R/T transmissions should be as short and concise as possible without sacrificing clarity. It is important that all personnel using voice communications be instructed in the proper use of the handset and R/T equipment. They must also be cautioned on the likelihood of transmission intercept. Adherence to prescribed operating procedures is mandatory! Deviations from these procedures create confusion, reduce reliability and speed, and tend to nullify security precautions. Once you know the proper operating procedures, you can use your initiative and common sense to satisfy specific operating requirements. Although circuit discipline is discussed here with respect to its connection with R/T procedures, you must understand that the requirement for circuit discipline applies to all communications circuits—not just R/T circuits. Every operator must recognize and avoid the following malpractice, which could endanger communications security: 2-1