Garmin GA 25MCX Low Profile Remote GPS Antenna

• Size: 1.8" x 1.8" x 0.6" (4.5 x 4.5 x 1.5cm)
• Cable length: 9' (3m)
• Compatible with:
  • Montana 600 / 600t / 610 / 610t / 650 / 680 / 680t
  • GPSMAP 60 series / 62 stc / 640 / 64sx / 695 / 696 / 76 series / 78 series / 96 series
  • GPS 60
  • GPS 76

For better reception in vessel interiors this remote antenna is the answer. It has a built-in magnetic mount and comes with more than 9 feet (3 meters) of cable and MCX connector.