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Old 13 February 2007, 05:13   #1
Andy Moore's Avatar
Country: UK - England
Town: Cowes, Isle of Wight
Boat name: Ditherer
Make: Avon Adventure 620
Length: 6m +
Engine: Optimax 135
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Posts: 1,638
AIS Engines

What AIS engines are there out there? I have heard of the NASA one. Are there others?

Andy Moore is offline   Reply With Quote
Old 13 February 2007, 11:51   #2
Country: UK - England
Town: Exmouth, Devon
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Join Date: Oct 2004
Posts: 765
Yes - besides NASA, Comar and EasyAIS are available in the UK. The Sitex one available in USA is a rebadged NASA. Also a newish one from an outfit called Milltech.

The only real difference between any of them is whether they have 2 actual receiver circuits for the 2 AIS channels or switch channels on one receiver.

In addition, now that Class B ('leisure') AIS is on the go, the later ones from NASA are now class B compatible. (If anyone has an older NASA unit, you can ask them for a replacement chip. They'll send you one on receipt of the old one.) Comar also now have a Class B transponder (around 600). Maybe worthwhile looking at if you do a lot of cross-channel / Irish Sea.

I don't think any of them are waterproof, so on a RIB would need mounting inside a console, possibly inside a box!

A lot more chartplotters now haev AIS facility although be aware that many only have one suitable port. Not a problem until you want to connect another NMEA device. Multiplexers are available, but not cheap.
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