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Garmin 1040xs Issue with Simrad AP26

Old 06-01-2016, 05:54 AM
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Default Garmin 1040xs Issue with Simrad AP26

Good day,

So I recently had a Garmin 1040xs installed and tied it into my autopilot. All is working well except when I try to anchor over a wreck or putt along at slow speeds. The boat icon on the Garmin unit spins and spins. I've tried changing it to north up, I have tried adjusting all the settings. Through lots of research, I've learned that the AP26 system is only transmitting @ 1hz when the Garmin unit requires 10hz to get it proper heading. The Computer that is hooked up to the AP26 is a AC20 and what I am finding through even more research is that it is NMEA compatible or at least the head unit is. If I tie in a Simnet System using the NMEA 0183 to 2000 converter would that solve the problem and send a strong enough signal to the Garmin unit?

Worst case scenario is that I have to buy a separate heading sensor but I am trying to come up with an affordable solution with very little messing around.

hope I was clear with my explanation...
Old 06-01-2016, 06:21 AM
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Good success has been had with the Lowrance Point 1 heading sensor
Old 06-01-2016, 07:07 AM
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the Lowrance heading sensor will work with the garmin?

I assume it just gets hooked up to the to the NMEA port in my network?
Old 06-01-2016, 08:22 AM
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Does the 1040 have the latest updates from Garmin? It should be on software version 6.3.
Old 06-01-2016, 11:17 AM
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yes...al updates have been done.
Old 06-01-2016, 11:43 AM
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Sounds like something is not connected right. If it was your gps would be using your heading from your autopilot and it sounds like it isn't. Or at least that's how my Raymarine autopilot/Garmin plotter works.
Old 06-01-2016, 07:57 PM
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I just realized who you are............in fact I fished with you when Phil ran your boat when it was in Margate.
I talked with Phil about this. It has to do with your heading sensor. Either it is not connected properly or the 1040 is not communicating with the heading sensor.
Old 06-01-2016, 11:52 PM
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are you sure the garmin and pilot are connected in both directions? I bet you have nmea 183 data going from plotter to pilot (for steering) but not from pilot to garmin for heading data. you'd need 4 wires connected.

do you get "heading" on the garmin? (Not COG which you have from gps) make a data box for heading. it should be same value as on the AP screen. or you may get a blank or dashes if it's not connected. I highly doubt it "needs" 10hz, it would just be better.

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