SI-TEX SAS-300 AIS Class B Transceiver w/External GPS Antenna [SAS-300-2]SAS 300 AIS Class B AIS Transceiver with External GPS Antenna The SAS 300 is a complete Class B AIS system designed for simple to use management, control, and display of all AIS targets within the VHF range. AIS data can be received from all types of Class B or Class A transponders and can be displayed either on a "radar" type display, with chart overlay or without. The vivid graphics and the simple menu structure on the 6. 5 inch, high resolution