GDL® 40

Part Number: 010-00849-20
Find a Dealer


A low-cost, on-demand weather solution for coastal boaters, the GDL 40 combines NMEA 2000® compatibility with reliable cellular network delivery. With the ability to overlay weather information over chart pages on compatible chartplotters, the user can see clearly what lies ahead – and make decisions on potential course changes accordingly.

Get Reliable, Real-Time Weather

The GDL 40 provides a number of weather features previously only available over satellite networks. Simply plug the system into any compatible Garmin chartplotter display and begin accessing on-demand weather radar, wind speed/direction, surface temperature, warnings, forecasts and much more. Because the system utilises the phone signal to deliver the data, it’s an ideal lower cost solution for boaters that remain coastal.

The ability to overlay information on the chart pages and see it over the route rather than on a separate screen means users have a ‘live’ visual on how the route could be affected. This allows the user to make quick decisions or course changes depending on weather reports.

The GDL 40 is NMEA 2000 compatible for easy plug-and-play installation. In addition to conventional pole or flush surface mounting, the GDL 40 can also be attached to the underside of many fiberglass or wooden decks, making it easily concealable. For improved reception, a third-party external antenna can be attached.

Pay As You Go

Because the GDL 40 receives data via mobile phone networks rather than satellites, it can provide weather information at a fraction of the cost. The system employs an on-demand cost structure, so there are no monthly subscription fees, only a small annual activation fee – the first of which is included in the price of the device.

Once you’ve activated your GDL 40, you can get 24 hours of weather updates every 15 minutes for a single payment of only £4.99 (€4.99 in Europe).


The GDL 40 features:

  • On-demand weather radar
  • Wind speed/direction
  • Sea surface temperature
  • Wave height/period/direction
  • County/marine warnings
  • Current conditions (Buoys/METARS)
  • Marine and city forecasts
  • Coverage areas of up to 1,000 km by 1,000 km (620 mi by 620 mi), including Austria, Belgium, Croatia, Czech Republic, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxemburg, Netherlands, Norway, Poland, Portugal, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
  • In the Box

    • GDL 40
    • Pole mount
    • Surface mount
    • Under deck mount
    • NMEA 2000 backbone/drop cable (6m)
    • NMEA 2000 T-connector
    • Documentation


    Compatible Devices