The Automatic Identification System (AIS) was developed to counter the safety limitations of visual/VHF/Radar that were traditionally relied on for safe navigation in busy waterways. Regulation 19 of SOLAS Chapter V requires AIS is to be fitted on all ships of 300 gross tonnes and upwards engaged in international service, cargo ships of 500 gross tonnes and upwards not engaged on international voyages, and all passenger ships irrespective of size. Because vessels with AIS can see each other’s course and speed in real time, AIS is a critical collision avoidance tool.