When decisive action's required, it's best not to have a watch that's overly complicated, which is one reason why the Luminox ANU 4200 Series 45mm Watch is preferred by maritime operatives. Indeed, ANU stands for Authorized for Navy Use, so you know the 4200 is quality. It's certainly tough as nails, with a stainless steel case, caseback, bezel, and crown along with a sapphire glass face, and it's water resistant all the way to 200m, just in case. The one way diving bezel makes sure you won't lose track of time, and the constant glow provided by the Night Vision Tubes means it's easy to check the time even in the dark. Additionally, the battery will last for up to 10 years, so you won't have to worry about replacing it or having your watch die on you for quite a while.