➡ a piece of fabric, usually hung from a pole, to indicate a nationality of a vessel.

➡ to be registered to a specific country(the flag state) and use their flag while sailing.

➡ Refers to the State in which a boat is registered.

➡ the salt water that covers most of the earth's surface and surrounds its continents and islands

➡ a large boat that carries people or goods across the seas or oceans

➡ a ship belonging to the armed forces of a State bearing the external marks distinguishing such ships of its nationality, under the command of an officer duly commissioned by the government of the State and whose name appears in the appropriate service list or its equivalent, and manned by a crew which is under regular armed forces discipline.