Describe the proper techniques for entering, moving through and using a penetration line in a wreck.
Tie off penetration line outside the wreck. The diver with the reel enters first, stopping, looking up, and around for hazards before proceeding. Secure line to a second point. Maintain neutral buoyancy with gentle kicks and/or by hold- ing on to nonsharp parts of the wreck and pulling yourself around. Maintain light tension on the line and wrap it around nonsharp objects as necessary to route it. Follow the line single file, keeping the line at chest level and off to one side. Don’t use line to pull yourself along. Reel diver is last to start exiting and removes line along the way.