Though you have an endless array of devices that can help you navigate your surroundings, you can always count on a good ol' compass to keep you on the right path and will go where most electronics can't. Prometheus Design Werx's new Expedition Watch Band Compass fits right over your NATO strap and is the perfect complement to any tool watch.
If you know anything about Prometheus Design Werx then you know this no simple compass. They've housed the (replaceable) compass inside a precision milled 6061T6 Type III hard anodized billet aluminum case that also features a glow in the dark gasket and is water resistant to down 100M. It also comes with a silicone carrier that lets you loop it onto just about anything.