I use a very lightweight small Suunto (I think it's the Suunto Gem)...no mirror or other frills (it does have a rotating/ratcheting dial). <br><br>I actually primarily use a Garmin Vista GPS which has a built in compass and altimeter for navigation, and the compass is just for backup. I guess I could upgrade compasses, but I hate to have a bulkier heavier compass. It might be okay if there was a compass whose mirror provided signalling on par with a signalling mirror, but otherwise I'd hate to do it, because I don't think I'd be likely to use the mirror much when doing orienteering. So do any of these compass mirrors work as well as a regular signalling mirror for signalling?<br><br>