Ok good to define terms especially when operating in a multinational environment. We had a student dry-drown at the Basic Recon Course a few years ago. He was struggling at keeping his face above water during the 40 minute tread water portion of the reconnaissance screener and they finally pulled him out of the water. The corpsman [medic] checked him out but didn't notice any water in his lungs. He died later when he got back to his room.