Help needed with Magnetic Declination for South Africa

Hey guys!

 

I need to know what declination to put into APM Planner.

 

The website says 18.8 (see attached screenshot)

But it also says the declination is NEGATIVE.

 

So do I put 18.8 or -18.8 into APM Planner???

 

 

Thanks :)

 

 

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Permalink Reply by John Stuart on September 6, 2011 at 11:53am

hi Gareth

I'm also in SA and I just entered it as a negative, the setup accepted it, shouldn't be a problem

-John

Permalink Reply by Jaques Viljoen on September 6, 2011 at 12:43pm

Hi Gareth, I got -17.32 for Pretoria - entered it like that and looked at the Flight Data page while rotating and turning the quad - looks within 10 deg to my untrained eye. Now I guess its up to flight testing...

 

Permalink Reply by Gustav Kuhn on September 7, 2011 at 4:35am

-24.5 here in Cape Town :-(

Works fine in my UAV.

Permalink Reply by Balloon on September 7, 2011 at 10:53pm

You need put -18.8 into APM Planner 

Becuase Your Position Declination is a WEST or Negative it's a ( - ) 

But, If Declination is a EAST or Positive it's a (+)

 

Now , I live in Bangkok. My Declination -0.38 or 0.38 WEST. And I compare between real compass and my Magnetometer . You should compare real compass (don't compass in Iphone or you moblie phone) Real Compass !!!!

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