Manual of Visual Signaling of U.S. Signal Corps (No. 6)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ... To simplify the taking in, reporting, and reading off of the distant signals, the four positions of the semaphore arms and the four symbols have been numbered!, 2, 3, and 4 (see figs. 12,13,14and 15). 1 representing the semaphore arm pointing upward on the opposite side to the indicator, a cone with the point upward, or a square flag (see fig. 12). 2 representing the semaphore arm pointing horizontally on the opposite side to the indicator, or a ball (see fig. 13). 3 representing the semaphore arm pointing downward on the opposite side to the indicator, a cone with the point downward, or a pennant (see fig. 14). 4 representing the semaphore arm pointing horizontally on the same side as the indicator, a drum, a pennant with a fly tied to the halyards, or a wheft (see % 15).. To facilitate signaling by semaphore or shapes, the signals representing the letters of the alphabet have been arranged in numerical order. Thus a is represented by 112, b is represented by 121, c is represented by 122, etc. The signals representing the letters from A to G begin with 1; those from H to U begin with 2; those from U to Z begin with 3; and the special signs--that is, code flag alphabet, numerical and finishing signs--begin with 4. The code flag sign 421 is always to be shown before signals taken from the general vocabulary of the International Code are commenced. When signals are made by the semaphore the disk is always to be kept up until the signals are completed, and the hoist is to be read from the top of the arm downward. The Stop...