VHF Radio

Principal radio system for fishing vessels

Terrestrial and selected satellite
Frequency range 30 MHz to 300 MHz
Typical range somewhat greater than line of sight
The higher the antenna from the surface, the greater the range

Typically uses 1-2 meter whip antennas

Various configurations for VHF satellites
You may need multiple VHF antennas, although some vendors offer sharing:
    VHF voice 1, VHF voice 2, AIS, satellite

Basic mode obsolescent compared to

which uses Maritime Mobile Service Identity (MMSI) as “phone number”

VHF radios come in

Fixed mount
The Coast Guard urges, in the strongest terms possible,
that you take the time to interconnect your GPS and
DSC-equipped radio.  
Doing so may save your life in a distress situation!  The radio can
give your position through DSC without any manual steps.
It’s a simple NMEA 0183 2-wire connection that Beachwerks
Coast Guard requirement: The equipment should be watertight to a depth of 1 meter for at least 5 minutes", and that it should "maintain watertightness when subjected to a thermal shock of 45 degrees C under conditions of immersion."


Channel 16  (156.8 MHz)
Vessels must monitor at all times if equipped with VHF

Aircraft emergency, used in older location beacons, is 121.5 MHz