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Furuno Marine GPS Antenna for GPS Navigator (FUR-GPA020S)
Replacing a defective GPS antenna - Digital Yacht News
External Marine GPS Antenna for Garmin Boat GPS GPSMAP with BNC Connector | eBay
NAVILOCK 12578: GNSS GALILEO GPS QZSS Marine Antenna 1575 MHz BNC male 28 dBi at reichelt elektronik
Radioddity BNC External Marine Fish Boat 8M GPS Antenna for Garmin GPSMAP-182C GPSMAP-185 Sounder (BNC connector), with 26 Feet (8 Meters) Long Cable
High Quality Marine Gps Antenna With 10 Meter Cable With Bnc Male Connector