# Tagged Questions

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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### Should orienting arrow and meridian lines be parallel on a compass?

I recently bought my first compass, a SUUNTO Spiegel- und Peilkompass MC-2/360/D CM/IN NH, black. I observed that the red orienting arrow and meridian lines are not parallel. They are forming an angle ...
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### Will a compass work underground or underwater?

Because they rely on radio signals, GPS units generally do not work underground or underwater, but what about a plain ol' magnetic compass? Are the magnetic fields of earth present at all depths? ...
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### How dependable is a cheap compass?

I was reading the BBC news today and there was an ad for an inexpensive "5 in 1 Outdoor Survival Gear Escape Paracord Bracelet Flint / Whistle / Compass / Scraper" I clicked on the link and saw this ...
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### Should you store a compass flat?

My girlfriend keeps hanging my compass on the wall. Is this doing it any harm?
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### How much distance is there between True North and Magnetic North Poles?

This question is not as simple as it seems, and a few minutes of googling did not drop the answer in my lap. A comment at I never adjust for true north. Is this bad practice? suggesting that: ...
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This question (Calculate true north with a compass and map) got me thinking. I rarely bother adjusting compass bearings for magnetic north. Is this bad? I understand the theory but I just rarely ...
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### Calculate true north with a compass and map

We've a map and a functional compass. A compass shows of course the magnetic north and the map provides us with the correct and current declination. The North Magnetic Pole is the point on the ...
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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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### 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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### 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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### 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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### 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 ...
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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?