AIS stands for Automatic Identification System and is a radio based technology that allows yachts and ships to share their identity and movement with other vessels. The system sends information automatically so that captains can see who is nearby, how vessels move and whether a collision risk exists. AIS has become one of the most important safety elements in modern navigation.
An AIS unit on a yacht broadcasts information at regular intervals. At the same time, it receives signals from surrounding vessels and displays them on the navigation screen. This makes the traffic situation easier to understand, even when visibility is limited. AIS typically shares several key details.
These signals are sent via VHF radio and can be received by nearby yachts as well as coastal stations. Many maritime services and apps can display this information in real time, which is why ships can often be tracked live on platforms such as MarineTraffic.
AIS is particularly valuable in situations that require clear awareness.
There are two main classes of AIS. Class A is used by commercial ships and transmits with higher power. Class B is used on pleasure yachts and private boats and provides the essential information needed for recreational navigation.
Although AIS is a powerful safety tool, it does not replace radar. Radar can detect all objects in the area, including vessels that do not transmit AIS. Captains use both systems together to build a complete picture of the surroundings.
For guests, AIS is interesting because it reveals the movement of other boats in real time. For the crew, it is an essential part of navigation that increases safety, improves communication and supports confident decision making on the water.
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