I scramble up and over the rusted-out hull of a small craft, lifting myself off what looks like a long mast dipping into water thick with oil slicks and who knows what else. Inside the boat, Cato walks one of the few planks left in the decayed deck. The opposite side of the plank shifts and lifts off the beam supporting it, and we all hold our breath. But Cato’s footing is firm and he crosses the deck and climbs down the opposite side. This hull sits in one below it like nesting bowls, a stack that makes up just a small fraction of the Staten Island Ship Graveyard.