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Go Back   SailNet Community > On Board > Gear & Maintenance > Electronics > raymarine boat position is 180 degrees off
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Thread: raymarine boat position is 180 degrees off Reply to Thread
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Topic Review (Newest First)
10-19-2011 11:56 AM
photon
Seatrial Calibration is the answer.

My Raymarine Autopilot ST600+ did the same trick on me today, it was showing exactly a reciprocal of the course steered, and worked as an basic autopilot but when asked to steer a route it changed course by 180 degrees!

Re-booting both the instruments and my Raymarine course computer (RL70C) did not fix the problem.

After reading this post I performed the "Seatrial Calibration" as described in the Owners Handbook, motored 2+ circles taking over 2 minutes for each, completed the deviation correction and then the autopilot allowed me into the "Autopilot Heading" alignment screen. Motored in straight line for about 1 minute then hit "auto" and the COG from the GPS was accepted as the heading.

Thanks to previous posts for the encouragement. I have no idea why this fault developed as the kit has performed flawlessly for the last 4 tears/10,000 miles?

SY Susanne
Kithnos
Greece
10-19-2010 06:12 PM
dugsmith98 Finally found the solution. Turns out the autopilot dumped the memory, and so had to be completely recalibrated. Dockside calibration, then compass calibration at sea with a couple of circles to get deviation.
The solution came from the raymarine help line while sitting on the boat.
Rebooting didn't give me any changes, so I eventually called the help line. After about 15 minutes they had it figured out and so all is now good.
Thanks for everyones efforts.
Doug
10-09-2010 07:56 AM
MARC2012 PO installed mine backwards,glad to learn can adjust that much,thanks.marc
10-03-2010 09:55 PM
CaptKermie
Fluxgate

Quote:
Originally Posted by brak View Post
I would start with that. My fluxgate compass from Raymarine could be removed from its base and reinstalled in more than one position. Worth looking into.
I will second that opinion. I diliberately installed my fluxgate backwards so that I could place it in a safer and better location. When I took the boat out to swing the compass I corrected for 180 degrees to compensate. Now if someone were to reset the controls to default or factory settings it would be off by 180 degrees. Then I would have to do the swing compass procedure all over again.
10-03-2010 08:58 AM
Faster We've had a couple of similar episodes with out new Raymarine ST6000 setup... no plotter, just auto.

What I noticed is that in addition to the offest the heading scrolled the WRONG WAY.. ie a turn to starboard generated a lower heading (in degrees). Since this represents positive feedback for the controller, the auto just layed the helm over hard and stayed there.

It's happened maybe 2 times in the year since I bought it, and a 'reboot' cleared it each time. A pain, though.
10-03-2010 08:48 AM
brak
Quote:
Originally Posted by hellosailor View Post
Lesser odds are that your friend somehow knocked the fluxgate sensor out of place, and popped it back in backwards. (G)
I would start with that. My fluxgate compass from Raymarine could be removed from its base and reinstalled in more than one position. Worth looking into.
10-02-2010 08:07 PM
hellosailor Doug, do you have a cell phone? I find that calling Rayma-who-ever- they are called from the boat, during business hours, usually gets some fast free tech support.

Odds are this is a matter of some menu setting for "heading/inverse" or for putting the mag compass into calibration mode and then making a couple of 360's so it can redetermine north.

Lesser odds are that your friend somehow knocked the fluxgate sensor out of place, and popped it back in backwards. (G)
10-02-2010 07:06 PM
PCP
Quote:
Originally Posted by jorgenl View Post
Have you tried rebooring the autopilot (i.e turn off and then on again)?

W\e had it happent to us that the autopilot did a doughnut (360 deg turn) in the middle of the gulfstream under sail at 25 kts of wind - a bit scary.

Once I got the boat under control the autopilot indicated that we were on a course of 90 deg while I was heading due west towards Florida.

M resoruceful wife solved the problem by turning of the autopilot for 5 secs and then turned it on again. Worked a charm and never had problem since.

Also check for big pieces of metal oblects that you may have placed closed to the aitopilot compass unit...
Same experience, not once, but several times (along several years). Try to fix it and Raymarine changed the giro compass, but to no avail. I think that happens when the boat passes over some magnetic disturbance.

A reset of the autopilot and the chart plotter solved the problem, all the times.

Regards

Paulo
10-02-2010 05:20 PM
wwilson
Quote:
Originally Posted by dugsmith98 View Post
...the boat is now 180 degrees off on the course heading.
Thanks, Doug
Doug,

I have an earlier Raymarine Chart- plotter, so it will make no sense for me to give you the menu sequence. Instead, look in your user manual under the title of "align heading". I have no idea how even kids could have messed it up for you, but take heart - it is easily fixed.
10-02-2010 03:20 PM
jorgenl Have you tried rebooting the autopilot (i.e turn off and then on again)?

We had it happen to us that the autopilot did a doughnut (360 deg turn) in the middle of the gulfstream under sail at 25 kts of wind - a bit scary.

Once I got the boat under control the autopilot indicated that we were on a course of 90 deg while I was heading due west towards Florida.

M resourceful wife solved the problem by turning of the autopilot for 5 secs and then turning it on again. Worked a charm and never had problem since.

Also check for big pieces of metal objects that you may have placed close to the aitopilot compass unit...
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