light differs from that laid down for the directional flashing light, as follows: 1. The call consists of a collective call sign or a number of call signs repeated until answered by all receiving stations. 2. Each receiving station answers by transmitting a continuous series of Ks until the calling station, seeing that all the receiving stations have answered, stops calling, waits a short time, then starts transmitting the message. When practicable, receiving stations should use a directional light of minimum brilliance. 3. Where repeating ships are used, they will repeat the originator's transmission word by word as received. 4. During transmission of the message, all receiving stations keep their signal lights out. Should a receiving station miss a portion of the message, that station is to request a repetition in the normal manner upon completion of the transmission. A station that is repeating the message as received but misses a portion may substitute the operating signal ZEP for the missing portion and proceed with the transmission. When the missing portion is obtained, it is transmitted in the form of a correction. ZEP means this portion (or message) was incompletely received. Each word or group missed, which is indicated by the position of ZEP in the message, will be forwarded as soon as obtained. 5. Receiving stations, after checking, receipt for the message by making RRRR. 6. When the prosign F is used in the non- directional procedure, no ship is to make any response to this call or to receipt for the message. Ships that miss the transmission or any portions thereof may request repetitions by directional flashing light from adjacent ships. In requesting such repetitions, ships should bear in mind the danger of disclosing the tactical composition of the formation. 7. The separative sign is used between coded groups. Where a special non-directional daylight signaling lantern (DSL) is fitted, the procedure to be used by the transmitting station is the same as prescribed for the non-directional procedure. Receiving stations answer by hoisting DESIG. Repetitions are obtained in the same manner as for the nondirectional procedure. The message is receipted for by hauling down DESIG. CALLING When calling another station, you are responsible for certain details. In visual communications, the identity of the calling station is usually apparent, and it is necessary only to gain the attention of the station being called. Normally this is done by directing the signal light at the station and making the receiving station's call sign until answered When it is desirable to identity the calling station, use the full call. This consists of the call sign of the station called, and when answered, the prosign DE and the call sign of the calling station. On occasion, when using the no-response procedure, it may be necessary for you to transmit the full call before or without being answered Examples: Abbreviated call—D15 (until answered) Full call—D15 (until answered) DE A22 or D15 DE A22 Collective or multiple calls may be used as required. A collective call sign consists of a single call sign representing more than one station: C Squad 2. A multiple call may consist of two or more individual or collective calls: C Squad 2 C40. Both collective and multiple calls may be followed by the prosign DE and the call sign of the calling station. Call signs and address groups that may be used in the heading and/or ending are visual call signs from ACP 129, call signs from ACP 113, and address groups from ACP 100. The call may serve as the address. When abbreviated calls are used, it is assumed that the message is addressed from and to the senior officer embarked. When this is not the case, use a full call or the address component. ANSWERING AND RECEIPTING The answer normally consists of the prosign K. The calling station may flash for the series of Ks from each unit until all units have responded. If necessary to distinguish which of several stations is being answered, the prosign K should be preceded by the call sign of the station answered. Where more than one station is being called in the same direction or during low visibility, the answering station may need to indicate its own identity when answering. This is done by transmitting the prosign DE followed by own call sign and prosign K. 4-5