Semaphore (signal flag)

Semaphore, using signal flags, is a visual communication method where individuals on ships or land positions use specific flag positions to transmit messages over distances. Each flag position or pattern represents a letter or command. By raising, lowering, or positioning flags in particular ways, signals can be sent quickly and accurately without electronic devices. This method is especially useful in situations where radio communication isn’t available or reliable, enabling coordinated and secure exchanges of information through universally understood signals.