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Simrad NAC-3 Autopilot will not read N2K wind data from Airmar WX220  

 

David Content
(@barefoot)
New Member
Joined:3 months  ago
Posts: 2
16/04/2018 3:54 am  

On an offshore cruising sailboat we find it impossible to have a new Simrad NAC-3 autopilot computer see or read the wind information from a new Airmar WX220 weather station transducer. Both units are on the N2K backbone.  The autopilot is controlled with a new Simrad AP-44 display. The AP-44 operating on the same N2K backbone properly displays the wind data and all of the other data output from the Airmar WX220. When the NAC-3 is put in “wind” mode an alarm on the AP44 states “AP wind data missing”.

Simrad technical support has over the last few months suggested numerous settings and items to check and confirm; none have solved the problem. Simrad is now stumped and states that it does not possess an Airmar WX220 and therefore is unable to investigate further.  Airmar outputs wind data PNG 130306 and Simrad NAC-3 looks for wind data PNG 130306!!!  The purpose for the Airmar installation is for the AP to steer the boat by the wind direction.

Anyone have any experience with this or any thoughts?


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Ben Stein
(@ben-stein)
Member Admin
Joined:5 months  ago
Posts: 35
16/04/2018 5:35 pm  

Do you have anything on the boat capable of logging the PGNs sent by the WX220. Armed with that data I would think you and Simrad could get much further in figuring out what the AP-44 doesn't like about the incoming data.  

Ben

Contributing Editor, Panbo.com


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David Content
(@barefoot)
New Member
Joined:3 months  ago
Posts: 2
16/04/2018 7:42 pm  

I had ordered an NGT-1 and it should arrive today.  It should arrive today; I'll have a look at the data.

BTW,Another boat is using a Maretron weather station with the same Simrad AP and it appears to function properly. 


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Ben Stein
(@ben-stein)
Member Admin
Joined:5 months  ago
Posts: 35
15/05/2018 9:59 am  

David,

Any update once you got the NGT-1 in place?  Have you been able to figure out what was happening?

Ben

 

Contributing Editor, Panbo.com


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