Seattle Sea Scouts

Seattle Sea Scout Fleet

of the Chief Seattle Council

Boy Scouts of America

Chief Seattle Council, BSA

National Sea Scouts

Boy Scouts of America

United States Coast Guard

Semaphore Code System

The Semaphore system is an visaual alphabetic signalling system based on the waving of a pair of hand-held flags in a particular pattern.

The Flag

The flags are usually square, red and yellow, divided diagonaly with the red portion in the upper left.

The flags are held, arms extended, in various positions representing each of the letters of the alphabet. The pattern resembles a clock face divided into eight positions: up, down, out, high, low, for each of the left and right hands (LH and RH) six letters require the hand to be brought across the body so that both flags are on the same side.

The Postitions

Flag positions in Semaphore

One way to visualize the semaphore alphabet is in terms of circles:

First Circle: A, B, C, D, E, F, G;
Second Circle: H, I, K, L, M, N (omitting J);
Third Circle: O, P, Q, R, S;
Fourth Circle: T, U, Y and 'annul';
Fifth Circle: 'numeric', J (or 'alphabetic'), V;
Sixth Circle: W, X;
Seventh Circle: Z

In ther first circle, the letters A to C are made with the right arm,and E to G with the left, and D with either as convenient. In the second circle, the right arm is kept still at the letter A position and the left arm makes the movements; similarly in the remaining circles, the right arm remains fixed while the left arm moves. The arms are kept straight when changing from one position to another.

The Semaphore Alphabet

Semphore Letter A and Number 1 A and 1 (LH down RH low)