New answers tagged

31

Compasses are good equipment both spelunking and diving. Even the deepest cave you could go to is still near the earth's surface, geologically speaking. The earth's magnetic field is also essentially the same under water as above. If you are using a compass, what you need to be aware of is nearby magnets and large sources of iron. So if you were exploring ...


0

How accurate/dependable should you expect an inexpensive compass to be? I would expect it to be as accurate & dependable as any Boy Scout compass would be. They are pretty cheap, even at the Scout Store & they are reliable for 6th - 12th graders to use. If a cheap compass isn't as dependable as one of the compasses which are safe for kids, then ...


1

Consider the question in the terms of basic physics. Essentially, the magnetic pull of the earth and needle's magnet creates a torque on the compass (wheel / disk / needle etc. ) causing it to rotate. In an ideal compass, the torque meets only dampening resistance - you don't want the needle to move too quickly or you will get an oscillation while hunting ...


6

There's cheap and there's too cheap! Remember - this is a tool you may be trusting with your life... For any kind of serious navigation you need a baseplate compass rather than the button type in your image. This is so you can take reliable bearings from your map to the land and back-bearings from the land to your map. Even the entry-level baseplate ...


0

In poor visibility you need to fall back on the basic navigational techniques of dead reckoning and any terrain features that you can still positively identify and follow. Dead reckoning involved keeping close track of the direction you are walking in and how far you walk. With practice this can be reasonably accurate, especially if you can augment is with ...


5

Inexpensive compasses in general are fine. Even from a good brand the base models are not much more than the price of a few beers. Indeed in most cases these are all you ever need. However cheap button compasses are a bit suspect. To be fair it looks like that picture is 4 separate images photoshopped over a background so the fact that the indicated ...



Top 50 recent answers are included