Originally Posted by Hannah on 'Rita T'
Do NOT, repeat NOT, get a BOatUS MMSI, it is not valid for use in international waters or when you have an SSB
on board and changing a MMSI is a nightmare. Which is why we haven't programmed our DSCs.
From the careful wording above I suspect that Evans' 'DSC friend' has done the same thing I have done: I have a MMSI associated with an FCC station license for Auspicious and have programmed that MMSI into the SSB and fixed VHF
on board; I have a Boat/US MMSI for my dinghy
that is programmed into my DSC handheld.
I found that between the fixed VHF
Icom M601 and handheld VHF Standard Horizon HX850S when both were programmed with the same MMSI that one would switch channels properly when called by the other but not the other way round. I can't remember which one didn't behave properly. A Boat/US MMSI for the dinghy (and handheld dinghy radio) sorted that out nicely.
With an EPIRB
, SSB DSC, fixed VHF DSC, SOLAS flares, yadda-yadda-yadda if I get to the point of depending on the handheld DSC for real help outside of USCG jurisdiction I have a whole bunch of troubles already. *grin*
Originally Posted by estarzinger
ok, I will have to learn about the position request feature.
I think there are two parts
of the challenge: 1. Getting the radios to report position automatically and 2. determining what NMEA
sentences the radio
generates in response to the received position report. If you can't find a listing of the supported sentences you can figure it out for yourself. Hook the NMEA-out from the radio to a serial
port on your laptop
(or a serial-to-USB converter) and 'listen' to the NMEA
output using a dumb terminal program. I use PuTTY which is overkill for this application but serves a number of other needs for me; it's free. You can get the pin-outs you need with Google
. Send me a note if you need help.
Strictly speaking NMEA 0183
calls for an RS-422 serial
interface, but it works fine almost all the time with RS-232.
Not all documentation
matches the equipment
so you may find yourself having to determine the as-built reality anyway, particularly for more obscure (at least at time of design and manufacture) functions.
Of course once you have figured out what the radio is transmitting you will have to figure out what the Furuno
chart-plotter understands. The same setup will allow you to send hand-built NMEA sentences to the plotter to see how the plotter reacts.
sail fast and eat well, dave