I know how to speak in semaphore. It’s a visual alphabet, like sign language. Each letter of the alphabet is associated with a specific positioning of the arms. You grab a flag in each hand, and spell out whatever it is you want to say by moving your arms accordingly. It’s intended to be seen at distances across several hundred yards. As a form of communication, it predates the telegram.
I learned semaphore when I was a beach lifeguard. It takes a while to learn it, but once you know it, it’s almost impossible to un-know it. Almost every beach patrol in the world uses walkie talkies, but for some reason, on a 30 mile stretch of beach that runs through Delaware, Maryland, and Virginia, walkie talkies are shunned for the more traditional use of semaphore.
I gotta admit that semaphore was one of the most fun parts of the job. You speak a language that no one else knows, and enter in what feels like some sort of secret society, as you send mundane images about what you want to eat for lunch up and down the beach. With each letter, the nylon flags fly into place with a satisfying Snap!