The SCU 31 GPS antenna plugs into your compatiable Standard Horizon VHF radio to enable AIS and DSC

SCU 31 GPS Smart Antenna
66 Channel WAAS GPS receiver
49 ft 15M routing cable
UV protected Ivory white color
NMEA0183 Data input/output
Rapid GPS acquisition time
3 year waterproof warranty

Antenna to work with the GX1400, GX1800, GX1850, GX2200 and GX6000
Can also be used as a replacement antenna for the older CP180 and CP300 chart plotters.