How to adjust a SIRS compass?

Webb · #1 12-26-2008, 08:57 AM

I can't find the instruction paper for my SIRS compass. I have the adjustment tool but need the "how" to adjust my compass for accuracy once I have it over the airport's compass rose.

Help please.

GregM · #2 12-26-2008, 09:19 AM

Choose your product and the installation instructions should get you there. Good Luck.

http://www.sirs.co.uk/aircraft%20light.htm

FredMagare · #3 12-26-2008, 09:40 AM

Webb,

The link didn't specify how...so based on my experience with Zodiac boat compass boards:

1. Align the axis of the aircraft on a compass rose in the north direction.

2. Utilizing a non-magnetic tool, adjust the compass until it reads 360*/000*.

3. Align the aircraft on the compass rose in the south direction.

4. With the non-magnetic tool remove one-half the error.

5. Align the aircraft along all the cardinal and sub-cardinal headings and note the deviations to compile your compass deviation card.

I hope this helps.

Note that the aircraft should be running and all normally used electrical equipment that might have an effect on the compass should be on.

Webb · #4 12-26-2008, 10:20 AM

Quote:

Originally Posted by GregM

Choose your product and the installation instructions should get you there. Good Luck.

http://www.sirs.co.uk/aircraft%20light.htm

Thanks folks. The East/West adjustment is in the port hole and the North/South is in the starboard hole. Easy enough to fix now.

Amazing all the little squawks to fine tune the during the first 40 hours. At least the TruTrak A/P is dead on the GPS for bearing.