AIS-B 600 AIS transponder is capable of displaying information of not only the vessel on which it is installed, but also adjacent vessels. It can also provide audio alarms with 3 levels of alarming distance of alarming distance to avoid vessel collisions. It comes with emergency laarm as well. GPS positioning function and easy operated keyboard is offered by our product while the average power consumption of the AIS transponder is less than 6W. The main unit for the AIS transponder has a compact structured shell, is tightly sealed and is capable of long term operation in stringent environments. Meanwhile, it features small size and light weight,making it convenient for installation and maintenance.