Cobra Electronics MRF80B-D Class-D Fixed Mount VHF Radio Dual output power for short and long communication. Allows operation on any of the three (3) different channel maps established for these areas. Instant access to national all hazards and weather information, 24 hours a day. When connected to a Cobra or most other GPS receivers, you can send your position to other boats in an emergency, or exchange position information with other boats or stations. Position polling capable. Monitors three (3) channels at once - Channel 16, Channel 9 and one (1) user selected channel.