No kidding about that "one way." Dad was off at maneuvers at Hood in the 60s (keep in mind, we still had conventional searchlights on the M48s back then) and he told us how disorienting it can be at night. Night shoots can be VERY dangerous with live ammo and large OAs. During the exercise a sergeant was CONVINCED he knew where he was and that he was oriented for live fire on the range properly. He had half the platoon firing on.... a town. Nice. Fortunately my Dad convinced him to save his ammo. Talk about disorienting. It really did happen back then. Now don't worry, the town was way out of range, but still... that's an ass-chewing.