MF Radio

Secondary radio system for fishing vessels

Frequency range 300 kHz to 3000 kHz (0.3 to 3.0 MHz)
Transceiver may also handle HF frequency range
Unpredictable range, certainly local area but can bounce long distances
Contains additional distress frequency complementing VHF

Wide range of antenna designs

Shore antennas can be tens of meters long
Various technique allow "folded" antennas
Shipboard installations may run along stays or upper masts
Especially if you try to use the antenna for HF as well, there can be inefficiencies, but additional coupling equipment can improve the situation. Consult a qualified FCC-licensed installer for antenna layout.

Can use

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

Generally fixed mount but handhelds exist

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
can make for you.


2.182 MHz distress frequency
Vessels must monitor at all times if equipped with MF
Navtex, a component of the Global Maritime Distress Safety System operates at 518 kHz
US Coast Guard monitors 2670 kHz