AIS is a cyber-physical system (CPS) commonly used in the marine industry for vessels traffic monitoring and assistance. Given its importance in collision detection, search and rescue operations and piracy prevention, Trend Micro conducted a unique security evaluation. The findings show that both the implementation of AIS, as well as the protocol specification, are affected by several threats including spoofing, hijacking and availability disruption.
Read the full evaluation here – http://www.trendmicro.com/vinfo/us/security/news/cybercrime-and-digital-threats/a-security-evaluation-of-ais