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Old 24 March 2010, 06:56   #11
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Originally Posted by malthouse View Post
The Falklands are in with the Chile chart in the case of Garmin, not sure about the others.
Hmm. I wonder what the Chileans call them? It would be VERY IRRITATING for Mr. Luxton if they used the nomenclature favoured by their immediate neighbours (not that there's any love lost there either)
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Old 24 March 2010, 07:41   #12
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If you can, I'd would go for NMEA2000 on all your equipment. It is so much easier to hook up, with proper matching plugs and sockets rather than soldering wires together etc. It aslo means you can easily upgradde items in the future with less risk of obselescence. 0183 will get gradually phased out I would think.
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Old 24 March 2010, 16:25   #13
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when I was in Chile and teling the locals I was on the way to the falklands, I mentioned malvinas they said no no here it is the falklands. Not a great deal of friendly neighbourly relations with chile and argentina eh
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Old 24 March 2010, 19:07   #14
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Not a great deal of friendly neighbourly relations with chile and argentina eh
I've had the "pleasure" of crossing that border just the once - there's not much joy at Immigration

The Irish Passport did no harm either side , Gen. Bernardo O'Higgins on one hand and Las Malvinas Fever on the other
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Old 03 April 2010, 07:20   #15
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A (probably thickie) question ... what is the relationship between DSC and AIS?

I'm looking at the Icom ICM411 DSC VHF, and the Garmin GPSMAP 551s in particular, and I downloaded the Garmin manual to see what it can do.

The Garmin says that you can "view information about other vessels" if connected to a DSC or AIS system so what is the difference between "DSC information" and "AIS information"?
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Old 03 April 2010, 07:46   #16
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A (probably thickie) question ... what is the relationship between DSC and AIS?

I'm looking at the Icom ICM411 DSC VHF, and the Garmin GPSMAP 551s in particular, and I downloaded the Garmin manual to see what it can do.

The Garmin says that you can "view information about other vessels" if connected to a DSC or AIS system so what is the difference between "DSC information" and "AIS information"?
Exactly what information you can see is going to depend on exactly which reciever / plotter you have, and of course what the other person has/is transmitting. But here is what you might be able to get:

DSC data fed to a plotter
If someone transmits a DSC distress call by holding down the red button expect to see their position on the plotter.

If you have a "friend" who's MMSI you know, you can 'ask' them (digitally) their position and it will show you on the plotter. As far as I know you need to know who you are asking so its not covering all vessels - and probably isn't set up to automatically ask every 5 minutes so update (although some might do this?).

AIS
Vessels with AIS transmitters (mostly large commercial vessels, and yachties with money to spend on toys - but probably not the Navy) send out their MMSI, speed, direction, size etc. Your plotter can then show the position of these (if suitably enabled) and many (all?) will work out from your course / speed and their if you are likely to collide and warn you. As you're on a budget you are unlikely to be transmitting AIS data yourself. On the more sophisticated systems you can presumably select and AIS target on screen and ask the plotter/vhf to call that vessel directly.
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Old 03 April 2010, 08:56   #17
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Thanks - I know roughly what ships around here transmit AIS as my other half has a PC-based AIS receiver system in the office - part of her job. I'm not worried about transmitting my own position, I really just wondered whether a DSC-enabled VHF linked to a chartplotter would show large ships who were actively transmitting an AIS position, but I guess not by the sound of it?
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Old 03 April 2010, 09:18   #18
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I really just wondered whether a DSC-enabled VHF linked to a chartplotter would show large ships who were actively transmitting an AIS position, but I guess not by the sound of it?
No, you'd need a VHF with an AIS receiver in it (extra 100)

Or a plotter with an AIS receiver in it.

Or a stand-alone AIS receiver black box linked to your plotter.
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Old 03 April 2010, 11:18   #19
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Thanks - thought that was probably the case. The only two Icoms with AIS look like big whizzy ones so they are out.

Looking at this Standard Horizon GX2100

http://www.standardhorizon.com/index...3&isArchived=0

This says it has "38400 AIS VDM sentence output to compatible GPS Chart Plotter" and then elsewhere in the spec it mentions NMEA but not specifically in relation to AIS output - would it work with the Garmin 551s? I have also looked at the manual for the GX2100 but it appears to use one set of NMEA wires for regular communication and a different wire for AIS signal so I'm not clear if this is "normal" NMEA or not ... anybody know? I thought NMEA was only two wires but I don't know much about it

If the two will work together it would provide chart, AIS, DSC VHF and sonar which is not a bad combination out of two boxes and one external antenna
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Old 03 April 2010, 11:37   #20
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You have two sets of NMEA connections, one fast and one slow. The fast provides the AIS data and the slow is a two-way feed for DSC stuff.
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