AIS Displayed on SIMRAD GO9 & Radar Overlay After reading quite a bit of information, especially on the AGLCA forum, I became pretty convinced of the importance of AIS. The Automatic Identification System (AIS) uses transceivers mounted on the boat to supply and/or read information about ships/boats in your vicinity (VHF range) such as ship name, size, identification, position, course and speed. The information can be viewed by boats having the system installed and provides a way for the operator to communicate with other ships without having to "guess" who they are attempting to communicate with. The system is very handy when operating in or near areas of large ship and barge activity. Especially on rivers where you can't see around the bend. Imagine coming around the bend in a river only to be met by a tug pushing a bunch of loaded barges. With the AIS the captain of either boat can hail the other and provide information about what they may need to pass saf...