Automatic Identification System (AIS)

AIS is an embedded anti-collision system on ships. It is mundane for ships on which apply SOLAS convention (ships of more than 300 tons, passenger ships, fishing vessels of more than 15 m). The system is essentially composed of a GPS, transponder and VHF antenna. The data exchanged by a ship equipped of AIS contain particularly static (name, age, cargo...) and dynamic information (cap, speed, GPS position...). These information are received by other ships and surveillance center. Since this system is not secure, sent information are thus not controlled and can are submitted to possible falsification.


DéAIS project proposes to model the capacities of AIS network coverage, as well as the mobility and behaviour of ships. The models of abnormal behaviours and the associated risks are done using ontologies. these models will allow to evaluate a behaviour, detect none-conformity compared to what is potentially expected.


Evaluation algorithms of the AIS message credibility and ships behaviour, were developed during this project. These algorithms allow to detect falsified or faulty AIS message. The risks associated to these error or malfeasance are equally determined. The objectif of this detection is to anticipate risks as soon as possible to alert the competent authorities.


A prototype of the AIS message analysis and detection system was developed in the project context. The system analyse in real-time sent AIS message by ships, evaluate the degree of dangerousness related to a fault or a falsification and recommends and alert level to address the competent authorities which decide an intervention. DéAIS system allows beforehand the reduction of risks thanks to an anticipated risk detection.