Quote:
Originally Posted by callmecrazy
Just acquired a good working C.A.R.D. unit from the previously mentioned boat being parted out. Paid $100 for it.
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Not familiar with the acronym. C.A.R.D?
Quote:
Originally Posted by callmecrazy
I debated a while about getting it.. I've considered them in the past, since I probably won't be generating the electricity to run a radar for more than a few minutes, and even AIS is a little out of my league at this moment... I figure most people transmitting AIS are also running radar, and the majority of commercial vessels will be running radar. I passed on the idea a long time ago when I found out they run anywhere from $3-500 on the rare occasions they show up on ebay, and there still around $600 from the one or two people actually selling them new.
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AIS Rx only is unreasonably expensive when done with stand alone kit.
But you can do it much cheaper. It takes only a
laptop with a sound card, a surplus scanner or other
VHF receiver that covers the 161.975 and/or 162.025 and the right
software.
Shipplotter is probably the best known and it's not free, but it does the decoding directly using the sound card, and it can pull down
satellite or OpenStreetMap imagery which you can save on the computer. Spend a couple of hours pulling down the maps you need before you leave. They aren't
marine charts but even without them, it has a 'radar' style display that's perfectly adequate for keeping track of AIS equipped vessels.
IIRC Seaclear et al require an
NMEA stream via a port to handle AIS, they don't do direct decoding, which makes it more expensive.
Most people
boating would probably have a
laptop already so you just a an old $25 scanner or similar and the
software. AIS receive will at least let you see the big stuff and stay out of the way.
Shipplotter is available from:
ShipPlotter
It comes as a working version for 21 days, after which a 25 Euro
registration is required.
The scanner will require a discriminator output mod, which is pretty simple and there are links on the site to locations that will give you a blow by blow description of how to do it or you can get an electronically inclined mate to do it for you. I'm using an old Uniden scanner thats around 15 years old for this and it works pretty well.
You would also need an
antenna cut for 162mhz (a standard marine
vhf antenna is fine).
(I have no interest, commercial or otherwise in this product, I just use it.)
You can get up and running on AIS Rx for around $100 all up.
Quote:
Originally Posted by callmecrazy
I think I made out pretty well
Now if I could just find a windvane....
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Is it plausible to construct one? Might be an interesting
project.
AussieGeoff