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Old 14 January 2008, 14:35   #11
Country: UK - England
Town: Exmouth, Devon
Length: no boat
Join Date: Oct 2004
Posts: 767
The Raymarine link pretty well says it all in terms of hooking it up.

Note that you cannot link NMEA and Navtex at the same time, even with a multiplexer as Navtex is not NMEA data.

As for the antenna, it's a cost and installation balance. A separate antenna may be cheaper if you have the space (and don't cost your time to install it!). As JW says, something like the Pacific heliflex antenna will do the job. A decent splitter is going to be around £100 (eg the EasySplit). They work on the basis that the VHF transmit power increases over a few milliseconds and the unit switches out the AIS receive circuit in that time.

Don't forget you'll need a PL-259 - BNC converter for an AIS unit. Do it that way then if you need a spare for the VHF it's easy to just unscrew the adapter.

I'm not sure I'd use the NASA pass-through and I'd have to check if it supports all NMEA or just GPS sentences (as it's original purpose was for connecting GPS and AIS to one port on a PC).

The NASA unit is a bit over £100; as an alternative the Comar dual receiver is just over £300. Either way, go for JW's suggestion of the box. The units don't generate any real heat but leave some space.

Let me know if we can help you out!

Tel 01395 227727
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Old 14 January 2008, 15:48   #12
Country: UK - England
Town: Andover
Boat name: Vampire
Length: 7m +
Engine: Suzuki 300
Join Date: Oct 2006
Posts: 58


I have a Raymarine AIS integrated into an E80 on Vampire. The comments regarding waterproofing and armouring the AIS are correct this will need to be done. The expert in this is Dorian Martin at RIBCRAFT who did the whole installation including NEMA 2000 linkage to the Suzuki OB. Please fire any q's my way and I will try and answer.


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Old 29 December 2009, 10:02   #13
Country: UK - England
Town: Portsmouth
Boat name: Skinnie
Length: 4m +
Join Date: Dec 2009
Posts: 15
Raymarine AIS

Have a look at the AIS gear test I did in tha last issue of Practical Boat Owner - you get what you pay for with the NASA kit, and its worth trying to stretch the budget a bit further.
Also, with Raymarine chart plotters, be aware that in general if you plug in AIS, you cannot plug in NAVTEX, and vice versa.
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Old 30 December 2009, 03:49   #14
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Town: Salcombe, Devon, UK
Boat name: BananaShark
Make: BananaShark
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Engine: 2xYanmar 260 diesels
Join Date: Mar 2003
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A separate antenna is a good idea as the AIS can hog the signal as it receives on either AIS or VHF, not both at once.
Originally Posted by Zippy
When a boat looks that good who needs tubes!!!
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Old 04 January 2010, 03:38   #15
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
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Join Date: Apr 2007
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Alternatively, does the new Icom 50(3?) not recieve AIS as well as squirting out position request & Distress positions from the DSC?

Granted, if the set goes down you've lost the lot.......
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Old 04 January 2010, 06:00   #16
Country: UK - England
Town: Bursledon
Boat name: Mustard
Make: Ribeye 785
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