This is what I did while aboard any of the ships I traveled on..
"The eyes and ears of the ship." The SM, along with being a lookout and recognition trainee, performs the duties involving visual communications. The Morse Code of flashing lights, the special arm positions of semaphore, the work and speed of tactical flag hoisting, and the colors of pyrotechnics are some of the primary responsibilities of the Signalmen. These methods of visual communications are used to pass administrative, operational, tactical, and emergency information which is necessary for a fleet, task force, or squadron of ships to maintain their readiness in any situation. Signalmen repair and make flags, correct and maintain a complex publication system, serve as members of boat crews, and are responsible for honors and ceremonies to civil and naval leaders.