Amazon.com: HYS Marine GPS Antenna IP65 Waterproof Antenna W/7M(22.96ft) RG58 Coaxial Cable SMA Male Connector with Marine ABS Mount Base : Electronics
Amazon.com: NEWASHAN External Marine GPS Antenna Aerial for Furuno GPA018 GP150 GP1850 Boat Ship Navigation Receiver Fishfinder Sounder 26ft Long Cable TNC Connector + BNC Adapter for All Marine GPS Device :