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CHAPTER 3 MESSAGES - 14243_51
PLAINDRESS MESSAGES - 14243_53

Signalman 1 & C - Aviation theories and other practices
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ADDRESS OF MESSAGE Most messages have at least one addressee responsible for taking action on the contents and for originating any necessary reply. Other addressees with an official concern in the subject of the message but who do not have the primary responsibility for acting on it receive the message for information. Do not be confused by the term information addressee. Even though an information addressee usually is concerned only indirectly with a message, frequently action of some nature must be taken within the command. Some messages have only information addressees. Exempt addressees are used when the originator desires to exclude one or more authorities from a collective title. PROSIGNS LEARNING OBJECTIVES: Define prosign. Match prosigns with their meanings. Procedure signs, or prosigns, consist of one or more letters or characters or combination thereof, used to aid communication by conveying, in a condensed form, certain frequently used orders, instructions, requests, and information relating to communication. Figure 3-1 is a list of prosigns, and their meanings, that are authorized for use in visual signaling. No others may be used. An overscore (a line over two or more letters) indicates that the letters overscored are to be transmitted as a single character (no pause between letters). ACP 129, Communications Instruction, visual Signaling Procedures, contains the procedures for the use of prosigns. NAVAL MESSAGE FORMAT LEARNING OBJECTIVE: Identify the parts, components, and elements of the basic naval message format. Figure 3-2 shows a message copied as received by flashing light. Figure 3-3 represents the standard format of naval messages. Study the figure and compare it with the message. Each message prepared in either plaindress, abbreviated codress, or codress will have three parts: heading, text, and ending. Each message part has certain components, which are broken down into elements and contents. Format lines 2, 3, 4, 14, 15, and 16 (fig. 3-3) identify the procedural portions of the 3-2 Figure 3-1.—Authorized prosigns and their meanings.







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