Flag signals

Flag signals can mean any of various methods of using flags or pennants to send signals: Flaghoist signalling or the flaghoist signalling system uses sets of flags and pennants to convey messages. The U.S. Navy uses a set of 68 flags, including flags for each letter of the alphabet and each numeral to convey messages of tactical or administrative nature. See [1]

Semaphore signalling uses 2 flags, held in specific positions to signify letters.

Wig-wag signalling (or wigwagging) uses one flag for signalling, in a method similar to semaphore. It was used in US Civil War times. A signal corpsman commonly stood on a platform about 6-10 feet off the gound, signalling to other units. The bright orange red and white flag made a primary target for the enemy.

See also