Originally Posted By: Yuccahead
Originally Posted By: thseng
I'm in the opposite position, never having used a mirrored compass - how exactly do you use the mirror?
The mirror, tilted at 45 degrees, allows you to sight your target and see your compass dial at the same time.

Here's a good explanation (animated GIF image) of how it works:

http://www.thecompassstore.com/usmircom.html