... B20 is beacon channel GPS receiver, automatically selecting the nearest beacon station ... with many kinds of external equipments, such as Navigation Equipment, Radar, Echo Sounder, ect. · Standard data output format: ... since last fix)Reacquisition: <1 sNEMA Information: GGA, GLL, GPS, GSA, GSV, MSS, RMC, VTG, XTE, ZDA and ... 30 - +65Humidity: 100% condensing, unit fully sealed. Beacon GPS Receiver B20