Re: [svein83] Advice on rangefinders.
The Nikon 8381 Forestry PRO Laser Rangefinder/Hypsometer has worked great for me. It is pretty rugged, easy to use, and it does the trigonometry for you if you're feeling lazy. With one click of the button this device will give you any of the following: height, distance, or angle (with respect to horizontal). And with every measurement the side display gives you a labeled triangle showing all angles and distances.
It's a little pricey, but it makes the measurements pretty easy.
Hits:Rugged
Easy to use
Multiple measurements
Batteries last forever.
Downsides: no lighted display
Pricey
Cheers.