This Reactor Gamma Watch is water resistent up to 300 meters. Maybe your Dad is a hunter and heads out to the tree-stand before dawn. The Superluminova on the hands and markers make the time easy to read no matter how dark it is. If your dad is a gun enthusiast Reactors are literally bulletproof. Seriously… you can shoot a Reactor with a double barrel 12 gauge shotgun and not only will it still look like the superior watch it is, it will still be ticking and keeping time.