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Environment & Energy

trof

(54,274 posts)

18. I understand. It matters.

Reply to HooptieWagon (Reply #17)

Sun May 19, 2013, 04:10 PM

May 2013

On my polar flights we sometimes crossed over both mag north and geographic north.
The lines of variation become a swirl on the chart and all mag headings become due south for a while. The 'whiskey' compass just twirls for several minutes.

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Highlight:

The North Pole moves as ice sheets melt (Greenland is losing mass) [View all] NickB79 May 2013 OP

.... limpyhobbler May 2013 #1

'It's always something...' freshwest May 2013 #2

And Greenland will be green again!!11!1!!1 corkhead May 2013 #3

It's going to rise as the weight of the ice comes off. DCKit May 2013 #16

There exist many ominious warnings jimlup May 2013 #4

Let me know when my 2000.0 star charts and Astro computers will be out of date. longship May 2013 #5

Pole shift... They mean geographical North? defacto7 May 2013 #6

Thanks for pointing that out. truedelphi May 2013 #7

This is going to fuck navigation all up. HooptieWagon May 2013 #8

Lines are lines. Probably not. defacto7 May 2013 #9

No, magnetic pole is only used to keep course. HooptieWagon May 2013 #10

Interesting... defacto7 May 2013 #12

OK, a brief rundown. HooptieWagon May 2013 #13

For a change of a few centimetres a year? No. muriel_volestrangler May 2013 #19

Yeah, you're right. HooptieWagon May 2013 #20

In Thule, Greenland north is more west than north Major Nikon May 2013 #11

Variation. Deviation is a compass error caused by proximity to iron. HooptieWagon May 2013 #14

True Virgins Make Dull Companions trof May 2013 #15

+1 HooptieWagon May 2013 #17

I understand. It matters. trof May 2013 #18

Damn, that must have been a confusing several minutes. HooptieWagon May 2013 #21