two-arm

Updated: May 20, 2025

With the drum, one tap indicates a dot and two taps in rapid succession a dash. Although these signals can be used with a dot and dash code, they should be so used in connection with a preconcerted or conventional code. Signaling by Two-Arm Semaphore. Signaling by the two-arm semaphore is the most rapid method of sending spelled-out messages.

United States. War Dept. - Manual for Noncommissioned Officers and Privates of Infantry of the Army of the United States, 1917 : To be used by Engineer companies (dismounted) and Coast Artillery companies for Infantry instruction and training

It was dingy, with a worn wooden floor, some heavy, plain, wooden benches lining the four sides, no pictures or ornaments of any kind. A single two-arm gas-pipe descended from the center of the ceiling.

Theodore Dreiser - The Financier, a novel