➡ 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.

➡ Celui qui est habile dans l'art de la navigation sur mer - qui sert à bord d'un bâtiment de l'État ou de la marine marchande; se dit d'un bateau ou d'un navire très endurant à la mer.

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

➡ a vehicle that can travel underwater, control its own movement and maintain its own life support.

➡ existing or located under the sea

➡ a liquid without colour, smell or taste that falls as rain, is in lakes, rivers and seas, and is used for drinking, washing, etc