COBRASELECT MR F77B GPS Marine Fixed Mount VHF Radio with Built-in GPS Receiver (Black)Marine VHF Class D fixed mount radio Built in GPS receiver Large LCD screen All NOAA weather channels USA, Canada & international channels Digital selective calling (DSC) Submersible for 30 min in 1m deep water Allows users to send distress signal at the touch of a button Rewind say again for 20 sec with a digital voice recorder TriWatch monitors 3 channels at once Scan Memory Scan checks all channels to find conversations in progress or placed in