One form of communication that is used is ‘Flag semaphore’ which is a way of sending a message or information from a distance using visual signals such as hand-held flags, rods, paddles and so on.
Messages are sent by holding the arms or two flags or poles in certain positions according to an alphabetic code. This is a form of communication to convey a message to those at a distance. The navy and airports are some of the places where this is used.
Do you think you have what it takes to decipher codes in semaphores? Try this quiz and find out.