Fig. 14
Fig. 15.
When the call of a station is acknowledged, both stations will adjust each on the flash of the other. When adjustments are satisfactory, the station called will acknowledge and cut off its flash, and the calling station will proceed with its message.
INTERNATIONAL CODE OF SIGNALS.
Description.—By means of the International Code of Signals people of different nationalities may communicate with each other, although neither party has knowledge of any language save his own native language. The code is, as its name indicates, international, and every seagoing vessel of every nation is equipped with its flags. The Code of Signals contemplates the use of 26 flags ([figs. 14] and [15]); one for each letter of the alphabet and a code pennant. Complete instructions relative to the use of this code are contained in a book issued by the Hydrographic Office, Navy Department, and known as the "The International Code of Signals." In using this system the signals are displayed by hoisting combinations of two, three, or four flags. All possible combinations represent words, expressions, or phrases, which may be found in the "International Code of Signals," referred to above.
Two-arm semaphore.—This system is frequently used by the United States Navy, the following instructions covering the use of the system:
1. To communicate with a station: