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Computers & Dive Timers: Discuss Compass Choices ? in the Dive Kit and Equipment forums: I use an outdoor compass too. Mine was about £9 for an oil filled one, I think it is the ...

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Old 23-03-05, 11:45 AM
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I use an outdoor compass too. Mine was about £9 for an oil filled one, I think it is the basic Silva model but would have to check that.
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Old 23-03-05, 02:01 PM
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Suunto compasses are balanced for 5 different zones around the world. If the compass is used in an adjacent zone the compass needle will tilt slightly. However, the further the compass is used from it's intended zone, the more the needle will tilt. In extreme cases the needle might stick. (the above comments are taken from the Suunto instruction manual)

Stuart
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Old 23-03-05, 02:31 PM
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Quote:
Originally Posted by Stuart Percival
Suunto compasses are balanced for 5 different zones around the world. If the compass is used in an adjacent zone the compass needle will tilt slightly. However, the further the compass is used from it's intended zone, the more the needle will tilt. In extreme cases the needle might stick. (the above comments are taken from the Suunto instruction manual)

Stuart
So tilt the compass

I always thought a needle would try to be aligned with the magnetic field around it. Thus it would be roughly parallel to the earth's surface for the elevations we use them at.
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Old 23-03-05, 03:24 PM
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Quote:
Originally Posted by turbanator
I would advise you to get an oil-filled orienteering compass.
Hello mate,

Any idea where we can get one from? And which one do you use?

Many thanks,

Ian
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Old 23-03-05, 03:59 PM
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Quote:
Originally Posted by NotDeadYet
I use an outdoor compass too. Mine was about £9 for an oil filled one, I think it is the basic Silva model but would have to check that.
Outdoor compasses from Silva are also Zoned and calibrated for different areas of the world. best to buy a compass locally.
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Old 24-03-05, 12:16 PM
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Quote:
Originally Posted by JAG
Hello mate,

Any idea where we can get one from? And which one do you use?

Many thanks,

Ian
Hi Ian,

I got mine from Snow and Rock, but I've seen them in places like Millets, any outdor shop really.

Mine is really just a plain one, with a luminous needle and a rotating bezel.
It does not have the flip-up bits as you don't need to be that accurate underwater.

It's like the first on this page : http://www.suuntousa.com/products_comp.htm.

hth
Paul
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Old 24-03-05, 12:40 PM
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Cheers Paul,
I'd never have thought about that but I can see where you're coming from. Think I will get myself one and give it a go.

All the best,

Ian
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Old 24-03-05, 12:44 PM
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Good spec compasses have a slight weight to accommodate them to the local dip angle (in the UK a free compass needle would point down a bit for north and in NZ up) but it is only a slight adjustment so that they work on a flat surface.

Since divers tip their compass until they rotate it doesn't make any difference to us so use one optimised for the upper Himalayas and it will still work fine.

I like strap on ones. It shares a wrist with the computer. The computer is on the palm side and the compass on the other side.
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Old 24-03-05, 12:45 PM
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Avoid the really cheap ones as they don't work that well. Silva, Suunto or Recta are reliable names to look for. You can check by the sound of tapping it if it is oil-filled or not. I use a Silva.
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Old 24-03-05, 12:51 PM
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'Er indoors has just said that her compass works prefectly well in any part of the world, she has never failed to scribe a perfect circle, d'oh.

Excuse me while I fetch her hat and coat.
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