INTERNATIONAL SEMAPHORE

an international system of signaling which indicates the letters of the alphabet by the positions in which flags are held by the transmitter. —Perception of Truth Approved Glossary (9 June 92)

an international system of signaling which indicates the letters of the alphabet by the positions in which flags are held by the transmitter.an international system of signaling which indicates the letters of the alphabet by the positions in which flags are held by the transmitter. There's another one called International Semaphore.