Navigating offshore is like on being on a Hohmann Transfer Orbit. In the military, where you have plenty of unpaid excess crew lounging about, they are kept busy constantly probing their surroundings and checking and rechecking every detail. It builds good work habits. Constant, useless work is considered good for morale, excellent training, and a preventative to mutiny. Offshore, on a merchantman, every extra hand on the bridge is probably making double-overtime-and-a-half so you set the autopilot and send everyone below. And you glance at the radar every hour or so while you catch up on your paperwork..