Nova or Stenlight and Influence on a Compass?

[prahja]

SamT - before you spout off - go and see how much a magnetic relay affects a compass and what distance you have to move the helmet to. I agree you should never have anything ferrous near a compass and there are alternative lighting methods for compasses. The question was about the Nova. It deflects a compass a hell of a lot more than other helmet lights that I have used. I have looked at the deflection with the helmets and lights that I wear whilst surveying and at the deflection from a Nova. Mine are negligible - the Nova will cause up to 180 degrees deflection. Before you start ranting take a deep breath and chill out.

 

[mountaingoat]

all caving lights will affect compasses, they have bits of metal, electricity and shit.

There are lots of non-magnetic metals and the electricity's influence (if designed correctly) is negligible. I've tried it with the Scurion and could not see any influence within my accuracy (which is not bad).
Actually, when the Swiss look at it as good for surveying, it should be more than perfect for the rest of the world....
Using additional lights may cause more errors due to the handling.

 

[darkplaces]

I wanna black glowstick!

Yes Nova3's affect compass's when sighting for survey. On and 'antimagnetic' what's that then? As opposed to non-magnetic?

 

[SamT]

Its my party and and I'll rant if I want to - rant if I want to - rant if I want to etc etc.

 

[Bob G]

I've done a fair bit of surveying in constricted spaces using a Premier carbide lamp - no problem.

 

[ian.p]

i think premeirs are made out of brass and so wouldnt interfeer with a compass   

 

[paul]

i think premeirs are made out of brass and so wouldnt interfeer with a compass   

Except if they have steel reflectors.

I think SamT's suffestion is by far the best solution.

 

[martinr]

and 'antimagnetic' what's that then?

American for non-magnetic apparently

http://education.yahoo.com/reference/dictionary/entry/antimagnetic

USA and UK. Two nations seperated by a common language?