International maritime signal flags are a set of special signal flags used for visual communication between ships and vessels in the seas and oceans. These flags are used to broadcast the so-called International Code of Signals (abbreviated MKS), which was approved in its current form in 1969. Most signals are 1 to 3 letters long, and each flag is assigned a Latin letter. In addition, each letter is given a specific meaning. For example: a flag consisting of two yellow stripes and one blue stripe is the letter D (Delta), which means "Stay Away - I'm Maneuvering Hard." On the other hand, the flag with two black and two yellow squares is the letter L (Lima) and means "Stop your ship!". However, MCS also provides letter-by-letter communication, where flags are assigned only the letter value without additional values.
