Semaphore

A signalling system used to convey information at a distance by means of visual signals, typically using flags or lights.

Semaphore is a traditional method of communication that has been used in maritime contexts for centuries. It involves the use of flags or other visual indicators, such as lights or mechanical arms, to send messages over long distances. In the maritime semaphore system, two flags are held in specific positions by a signalman to represent different letters or numbers. The positioning of the flags corresponds to a prearranged code, allowing for the transmission of complex messages. Semaphore is particularly useful in situations where radio communication is unavailable or impractical, such as in the early days of naval operations or when ships are operating in close proximity but need to maintain radio silence.

The semaphore system is still taught and used in some naval and maritime contexts today, both as a backup communication method and as a historical skill. It is also used in ceremonial contexts, such as during naval parades or other formal maritime events. While semaphore has largely been replaced by more modern communication technologies like radio and satellite systems, it remains an important part of maritime heritage and is a reminder of the ingenuity of early sailors in overcoming the challenges of long-distance communication at sea.