According to today's headline information, lighthouses sailing at sea are usually called navigation marks. Navigation AIDS refer to facilities used to indicate the navigation direction of ships, mark navigation channels and warn of dangers, including lighthouses, light boats, buoys, signs and beacons. The function of navigation AIDS is to provide navigation and safety guarantee for ships, help ships avoid dangerous areas and ensure navigation safety.
Navigation marks will be named according to their positions, functions and characteristics. For example, a lighthouse is a tall building, usually located on the coastline, which is used to indicate the navigation direction and mark the navigation channel. A canoe is a floating navigation mark, which is usually used to mark obstacles and dangerous areas at sea. Buoy is a floating navigation mark, which is usually used to mark the channel and warn of danger.