SI-TEX SAS-300 AIS Class B AIS Transceiver w/Internal GPS Antenna [SAS-300-1]SAS 300 AIS Class B AIS Transceiver with Internal GPS Antenna Features: 6. 5" High Resolution color TFT display with 740 x 480 pixels Track AIS targets on standard "radar" display, over included worldwide base charts or (with optional SD Card) overlaid onto full C MAP MAX cartography Advanced Rmax technology maximizes receive transmit range, and ensures that all available AIS messages are received and decoded in real time Track up to five vessels with