2660: Origins of Semaphore Mar 30, 2022

Although the idea of having a system of flag-signals to represent letters for use on ships or other long-distance scenarios might seem both vital and basic, the modern semaphore system only came about in 1866. This followed the telegraph system and the optical telegraph. While the optical telegraph was useful for shore-to-ship signalling as it was a large structure and could use long mechanical arms to do so, but on ships this was impractical so people signalled with their hands, often holding flags for visual clarity. That said, by the time semaphore was introduced formally, the optical telegraph was out of use, replaced with the electric telegraph.