A must-have reference poster for the wall of any marina, boathouse, classroom, or waterfront home! This is the wall chart of the official International Naval Signal Flags, which every true mariner needs to know how to identify correctly. Chart includes the alphabet of square signal flags, from Alpha to Zulu; 14 horizontal class flags; and all the Semaphore signalling positions.Attractively designed to look great on the wall! A must for any true yachtsman.