magnetic variation

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firstsurreysjeff
Posts: 2
Joined: Tue May 14, 2013 7:26 pm

magnetic variation

Postby firstsurreysjeff » Tue May 14, 2013 7:42 pm

The British Geographical Society have given me the magnetic variation in N. France in 1916 as 13 degrees.
Can you help with an experiment?
If you are are wearing steel helmet, carrying a slung rifle and holding a service revolver. Will you get a noticeable magnetic deviation on the compass card when taking a bearing? Better still if you can use a WW1 type Verney prismatic card compass.
All this came about after reading German reports of British attacks being on the wrong axis and making them vulnerable to enfilade fire.
There was some controversy over the mv at the time and the magnetic compass orientation was not settled in the BEF area until 1918. All reports etc had to show a TRUE bearing and then the MAGNETIC variation added to give a MAGNETIC bearing.
If you have a genuine WW1 helmet and any compass will do. Can you see if you notice any deviation?
Taking a compass bearing, under fire, would be nigh on impossible. 6 degrees out in a km can be 150m out at the target. Providing you can walk in a straight line.




firstsurreysjeff
Posts: 2
Joined: Tue May 14, 2013 7:26 pm

Re: magnetic variation

Postby firstsurreysjeff » Wed May 15, 2013 1:41 pm

Thanks Merlon, just the sort of background information I need.




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