What does the navigation mark mean?

[navigation mark; Buoy; Navigation equipment; Signal light]

Signs set up to guide and assist the navigation of ships, including luminous navigation AIDS (such as lighthouses, lampposts and light boats), non-luminous navigation AIDS (such as buoys and beacons), radio navigation AIDS and audio navigation AIDS, explain the safe navigation of ships in detail. Common lighthouses, buoys, light boats, etc.

Word decomposition

Interpretation of navigation: navigation × ship. Sail or fly: sail. Aviation. Aerospace. Sail (sail) Flight. Civil aviation. Radical: ship; The end of the tree extends to the surface, not the root: the specimen. Treat the symptoms, not the root cause. Mark: trademark. Road signs. Mark. Sign. Ruler's slogan To express in words or other things: express. Title. Price tag. Advertise (originally for revealing and displaying; Later extended to propaganda and boasting).