Impending Death averages three feet wide and two foot high. Half of that two feet is, you guessed it, water. Surveying was a chore. To accomplish this task, I backed out of the passage feet first (we surveyed out) and MuddMan followed me. That made backsights easy. We wrote everything down on a glow-in-the-dark dive slate. Here, Pat dutifully keeps the compass dry the only way he could. Floating his helmet and Sten Light on his Swaygo Pack was the only way we could see!