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Automatic Identification Systems (AIS)

AIS is a VHF communication system using the SOTDMA (Self-Organized Time Division Multiple Access) method. It is designed to enable ships to send information, including their identification codes, locations, navigation courses and speeds and also to receive and analyze similar information sent from other ships in order to obtain knowledge of the movement of vessels navigating nearby and to effectively prevent collisions.
It is a system of crucial importance in ensuring passenger safety and improving the security and efficiency of navigation.
AISs can also be used to collect information on weather conditions and marine climates.
Installing AIS devices on ships other than those which are obligated by the SOLAS (International Convention for the Safety of Life at Sea) to carry these devices and developing land stations (base stations) will greatly improve the effectiveness of AISs.

Conceptual Chart of the AIS