Garmin VHF 315 Marine RadioExperience crystal clear marine communication with the Garmin VHF 315 Marine Radio a 25 watt VHF Class D DSC system built to keep you connected, safe, and in control on the water. Preprogrammed with U. S., Canadian and international marine channels plus 10 NOAA weather channels, its ready to go right out of the box. Designed to work seamlessly with Garmins onboard system, the VHF 315 includes a built in GPS receiver (external antenna required) and