Maybe not a bad idea there.
Some kind of 'Extreme survival' mission for that super-realistic player.
Perhaps a mission where you, as a door gunner in a helo, are the last surviving crewman after being shot down or just plain crashing. You have no idea where you are since you're just the door gunner. Damned compass didn't survive the crash either...
There is a way to find South with just your watch though.
It takes a little mental manipulation in ArmA since you can't rotate the watch... but it still works. You can find West/East based on the time of day and the position of the sun, but that's usually off by a few degrees, and over long distances, a few degrees can make for a big error.
Anyway, I'm trying to think of a way to explain the fact that you need to go straight South (or North) to get a compass, then you can find where you are... then you can radio for help. All the while being hunted of course.
Add some twists, turns, and excitement... could be interesting. I'd play it.
Any ideas?