I carry one of the combo whistle/compass things in my off side (non-key) pocket along with a lighter and space-pen. Niether is the best, both are not too bad and far better than nothing. <br><br>It's reasonably flat, so doesn't make an obvious bulge and it's reasonably comfortable as well.<br><br>An idea for you: Buy one of the mini key-chain compasses and pull the compass out (I did that for my mini-PSK). I haven't tried mounting it for everyday use, though.