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The Garmin 178C | Our an independent review of the Garmin 178C marine GPS chartplotter and more on marine electronics.
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HQRP GPS Antenna for Garmin GPSMAP 176, 176C, 178C Sounder, 180, 182, 182C, 185 Sounder - Walmart.com
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GPS Antenna BNC for Garmin GPSMAP 215 220 225 230 232 235 Sounder 238 276C 298C _ - AliExpress Mobile
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