AIS (Automatic Identification System) ensures information exchanges between ships, offshore platforms and shores in the VHF frequency range.
AIS is a broadcast system providing vessel information to the coastal authorities ashore, other vessels and offshore platforms. Next to the ship identification (ID: name, length, cargo, tonnage, destination, route, number of passengers, etc.) this information also contains details about the vessel's positioning, course and speed.
AIS allows port authorities to see all large vessels (as they are required to have AIS) on a chart. Besides land based AIS also satellite based AIS solution can be provided. Satellite AIS extends the visibility range to a much larger coverage area.