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Glendon wrote:
Your compass will "stick" as the bearing that the card sits on binds due to the magnetic force of inclination tilting the card. That is, your readings will become erratic. If its a hand held compass, you can sometimes tilt it to allow the card to float freely on its bearing, and still be able to use it. Many compasses allow for adjustment. Check yours. The problem is real, and varies with the earth's magnetic field, which does not simply vary with lattitude. See, for example, the Silva or Suunto compass sites for charts of the 5 compass zones that manufacturers make compasses for. It sounds like your compass is zone1, and I think NZ is in zone 4. A while back I bought a set of Fujinon binoculars from the US. The inbuilt compass is unusable here in Australia....it just sticks anywhere between +-20 degrees off true bearing. "Evan Gatehouse" wrote in message ... Anybody have any experience using a Northern Hemisphere compass as far south as say New Zealand? I *know* you're supposed to have a s. hemisphere compass in an ideal world, but I'm wondering how much the card deflects i.e. is it still useable, even if tilted. Does this problem occur in fluxgate compasses also? krj |
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