Never get caught off guard by the weather again. This innovative receiver relays real-time XM NavWeather satellite data with doppler radar summaries, current weather conditions, weather warnings from the National Weather Service and city forecasts from across the nation to your 700, 900 or 1100 series Humminbird sonar unit. Watch in vivid color as the weather rolls in and see if it's heading your way, so you know if there's time for one more cast or if it's the moment to start high-tailing it back to shore. For $9.95 per month, less than a spool of fluorocarbon leader, you can subscribe for this service. Only pay for the months you use it. Inland coverage only, no saltwater. Requires $14.99 activation fee.