Compasses are a navigational instrument utilising a magnetized needle giving a frame of reference based on North, South, East and West, as well as their intermediate directions such as SE, NW etc. This is based on Magnetic North, and not True or Grid North.

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Most accurate way to judge distances traveled in a kayak?

I like to make maps in my kayak, so I need to know how far away I was from the last point, so the only way I know of is dead reckoning, and being in kayak its not that accurate. So my question is: Is ...
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How did cartographers map out shores before modern times?

I was down at high rock lake N.C. and I was making a little map of the shore lines in my kayak, or at least going to. I ran into a problem, I could not judge the distance from the last mark I made to ...
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How did people make topographical maps in the pre-modern?

I've been getting into making maps with compass and a ruler and just triangulating positions of objects. I would like to start making topographical maps but how? How did they make them before the ...
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How easy is to magnetically destroy a compass?

I have quite a lot of items with built-magnets in my backpack, like a mobile phone, an iPod or headphones. How easy is to destroy my compass by putting it too close to these items?
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Can a compass needle become de-magnetized over time?

My compass has become increasingly untrustworthy. Over the past couple years I had noticed that it often pointed pretty close to magnetic South, but it corrected after a light tap. In two recent ...
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What should I look for when buying a Lensatic Compass

Lensatic Compasses seem to be priced from $5 to $100 USD. What features should I look for when buying one?
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How can you navigate without a compass or GPS

What are the ways you can navigate when you don't have a compass or a GPS? For example how can you tell which way is north.
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Is a compass generally accurate in only one hemisphere, or both? [duplicate]

Possible Duplicate: Navigational gear worldwide I'm not that well travelled (never been outside of Europe!) but at some point I'd love to head elsewhere to perhaps hike somewhere a bit more ...
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How can you navigate / determine your location in thick fog?

Are there any good hints, tips and ways you can use to navigate around and find your location in thick fog (apart from a GPS)?
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Magnetic deviation at either pole

I know that the magnetic north is not exactly at the polar north, so when hiking very close to the Northern Pole, you have to take the difference into account. This got me thinking: Is this also a ...