First; What the others have said;
We use both a Marine Band Radio (ICOM 802) and a Ham radio (ICOM 7300) on board our 37' sailboat.
If you just want to listen
to various radio stations and maritime nets, then a Ham radio transceiver will be less expensive. You will need a station & an operator's license to operate the Ham radio set in the transmit mode
and a knowledge test is required to obtain said license. Of course, nothing is required if you are just listening. Also; Not all ham radio sets are capable transmitting on Marine Band frequencies but most will receive those frequencies.
The Marine Band radio operates on specific marine band channels, requires a station license ($250.00 for 10 years, plus an $60.00 operators license) and will transmit and receive on some of the Ham frequencies as well (See Dockside Radio description on technique)
But you should understand that these are two distinct applications and although the radios may overlap in coverage, they are licensed differently and designed to different technical standards.
You should know that it is illegal to use a 'Ham Radio' on the Marine Bands as stated above. To do so, is a violation of International Laws & Treaties and many countries will observe this restriction. Don't get caught !
If it were me, and if I correctly understand your question, I'd op for a Marine Band Radio like the Icom
802 over a Ham radio set for High Frequency operation. You can also listen to the ham bands with it and if you need to call for help while out at sea, you'll be talking to a freighter or a tanker that might be able to render assistance. Ham bands for that purpose are a little dicey .
One real big help in this might be contacting someone like Dockside Radio in Punta Gorda, FL. for a further discussion.
GRIB-stands for gridded binary, and is a form of packing meteorological data.
The files contain different kinds of parameters, stretching from precipitation and cloud cover to wind speed and wave height.
GRIB data are a numeric product and are not verified by meteorologists.
From time to time the grib files will give a wrong forecast
. In some situations the conditions may be significantly different than the files show.
Grib files shall only be used as a supplement to forecasts from official sources (such as GMDSS, text/radio forecasts from meteorological centers), never as a replacement.
Critical decisions should never be taken at the basis of information from this service
, and any decisions made on the basis of information from this service
, is entirely at the users own risk.
Hope that helps.
Bill W2CWL WDI7390 MMSI#367728250