Second Substitute (ICS Flag)
Substitute or repeater flags allow messages with duplicate characters to be signalled without requiring multiple sets of flags.
Message Translator
International Maritime Signal Flags
Dive into the colourful world of maritime communication with our International Code of Signals (ICS) Flags Guide! This essential download showcases all the iconic flags and pennants used by sailors worldwide...More Details
Did you know?
Only black, blue, red, white and yellow are used because these are the only colours readily distinguished at sea. Many different coding schemes have been used, but the International Code is the most common.
