What is Automatic Identification System (AIS)- Types And Working (FAQs)

The world of AIS (or Automatic Identification System) can often be a confusing one to delve into, with many questions arising, such as “what is AIS?” “why do I need it?” and “what type of AIS does my ship need or have?”

An automatic Identification System (AIS) is an automated tracking system that displays other vessels in the vicinity. The broadcast transponder system operates in the VHF mobile maritime band.

Your ship also shows on the screens of other vessels in the vicinity, provided your vessel is fitted with AIS. If AIS is not fitted or not switched on, there is no exchange of information on ships via AIS.

The AIS onboard must be switched on at all times unless the Master deems that it must be turned off for security reasons or anything else. The working mode of AIS is continuous and autonomous.

Why is AIS provided?

It is fitted on ships for the identification of ships and navigational marks. However, it is only an aid to navigation and should not be used for collision avoidance. Vessel