SHIPS' BOATS.—The following visual call signs are assigned for ships' boats. Q p 0 Qp1 Qp2 Qp3 Qp4 Qp5 Qp6 Qp7 Qp8 ) ) ) All boats Admiral's barge Chief of staff barge or gig Staff gigs or motorboats Captain's gig Boats under power Boats under sail Boats under oars Reserved for local assignment by commanding officers. Calls are generated according to boat numbers. Qp5p0) Boat calls consist of QUEBEC hoisted above numeral pennant(s). Together, they signify the type of boat(s) called. Numeral flags following the call sign indicates the individual number of the boat. Thus, Qp54 is the call sign a ship would use for its utility boat number 4. To call another ship's boat, the call of the ship is hoisted below the boat call. For example, Qp4Rp1p4 is the captain's gig of carrier 14. ADDRESS GROUPS Address groups are four-letter groups assigned to represent a command, activity, or unit. Although address groups are used mainly in the message address, they can be used in military communications to establish and maintain communications in the same manner as call signs. In general, call signs and address groups are used by the Navy in the same way. Address groups never start with the letter N; hence, they are easily distinguishable from naval radio call signs. Unlike international call signs, address groups follow no distinctive pattern. For example, you learned the difference in call signs for naval ships and shore stations. In address groups, however, the arrangement of the four letters is not significant. All commands afloat (except individual ships) are assigned address groups. Address groups are assigned also to shore-based commands, authorities, or activities not served by their own communication facilities. More specifically, these are (1) senior commands and commanders ashore, such as the Secretaries of Defense and of the Navy, bureaus and offices of the Navy Department, and district commandants; (2) fleet, type, or force commanders ashore; (3) elements of operating forces permanently ashore who are in frequent communication with forces afloat; and (4) elements of the shore establishment (such as weather centrals) having a need for direct addressing and receipt of the messages. Among other uses, address groups aid in the delivery of messages when a communications center serves so many activities that its own call sign is insufficient to identify the addressee. Address groups, like call signs, are divided into types. They are individual activity, collective, conjunctive, and geographic address groups, and address indicating groups. Individual Activity Address Groups Individual activity address groups are repre- sentative of a single command or unit, either afloat or ashore. Examples: DTCI . . . . . . COMPHIBLANT SSMW . . . . . CNO Collective Address Groups Collective address groups represent two or more commands, authorities, activities, units, or combinations of these. Included in the group are the commander and subordinate commanders. Examples: DSWN.. . . . . DESRON 16 AMGK . . . . . . SIXTH FLT Conjunctive Address Groups Conjunctive Address Groups You must remember that conjunctive address groups have incomplete meanings. It is always necessary to complete the meaning by the addition of other address groups denoting a specific command or location. For that reason, conjunctive address groups are used only with one or more other address groups. The conjunctive address group XZKW, for example, means “All ships present at .” This particular group must be followed by a geographic address group to complete the meaning. Geographical Address Groups Geographic address groups should be included as a part of an address designator only when necessary to complete the titles of addressees or originators, in 3-16