Saab R4 AIS
R4 AIS Transponder System is a 4th generation design. The core of the transponder is a software defined radio, combined with a high quality built-in GPS receiver and processor. The IMO compliant Saab R4 carries type approvals from a number of countries, including EU, US Coast Guard, Russia, India, Brazil and China. It can be installed as stand-alone AIS or in combination with the R4 DGPS sensor.
The R4 AIS system comes in several variants; as a full Class A, as a Secure system for Coast Guard or Navy solution or as an Inland AIS transponder system.