Visual beacons
Visual beacons are the most common type, including lighthouses, light posts, markers, buoys, light ships, etc. They are displayed by shape, color and appearance during the day, and by light color, light interval, number of times, range and height at night. Drivers can quickly identify the waters and the ship's position by observing these signs to ensure safe navigation.
Audio beacons
Audio beacons can play a role in weather with poor visibility such as fog and snow. They can emit specified sound signals to help nearby ships identify obstructions or dangerous areas. The hearing range of audio beacons is usually only a few nautical miles, so they can effectively provide navigation information in foggy days and other conditions.
Radio beacons
Radio beacons use the propagation characteristics of radio waves to provide positioning and navigation information to ships. This type of beacon includes radio beacons, radio navigation stations, radar transponders, etc. They can provide accurate navigation information at a long distance, especially suitable for complex or dangerous waters.