Sailing flags, also known as signal flags, are colorful flags used by sailors to communicate important messages at sea. Each flag represents a letter of the alphabet or a specific message, allowing ships to convey information such as their identity, intentions, or requests for assistance. The International Code of Signals is a standardized system that defines the meanings of these flags. In addition to the alphabet flags, there are also special flags that indicate specific situations, such as diver down or man overboard. These flags help ensure safety and effective communication among vessels, especially in busy or challenging maritime environments.