Connecting a GWH 20 to an Older VHF Radio

The GHS 20 is a wireless handheld that can connect to Garmin VHF 200, VHF 300, and VHF 300 AIS radios. The GWH 20 is the wireless hub that connects to the VHF radio that provides this wireless capability. In order to properly communicate with the GWH 20 and the GHS 20, the VHF radio requires a software update to version 2.60. This software update can only be installed by Garmin or by an authorized servicing dealer.

If the GWH 20 is connected to the VHF radio before the required software update is installed, the radio may immediately dispatch a distress call. This signal will be received by the coast guard and any boats in the area. To stop this call from transmitting, power down the VHF radio and remove the GWH 20. (If a distress call has been transmit, it is recommended to power the radio back on and contact the coast guard to cancel the distress call.)

To correct this issue and ensure that the VHF radio is compatible with the GWH 20 and GHS 20, contact Marine Product Support to set up a Return Material Authorization (RMA) to update the software in the VHF radio.