AIS, Automatic Identification System, is a promoted standard and implementation for vessels traffic safety and monitoring. With more than 400,000 installations worldwide, AIS is currently a mandatory installation for commercial vessels and a de-facto equipment for leisure crafts. AIS is largely used in ports worldwide -- Rotterdam alone monitors over 700 AIS-enabled vessels each day, serving 32,000 seagoing and 87,000 inland vessels a year. Back in October 2013, during HITB KUL, we showed that AIS is hardly broken, both at implementation and protocol level, and it suffers from severe vulnerabilities like spoofing and man-in-the-middle. In this talk, we extend our research by sharing with the audience several novel attacks that we recently discovered, for example how to extensively disable AIS communications or attack the software installed at back-end by port authorities. By doing so, we hope to raise the necessary awareness and lead the involved parties into calling for a more robust and secure AIS.