To heel a vessel to one side to clean, caulk, or repair the underwater hull This may be accomplished by moving ballast and/or cargo, or by pulling the vessel to port or starboard with blocks and tackles fixed to the shore A beach suitable for careening a vessel is called a careenage
To careen somewhere means to rush forward in an uncontrollable way. He stood to one side as they careened past him = career, hurtle. to move forwards quickly without control, making sudden sideways movements British Equivalent: careercareen down/over/along etc (careen (16-21 centuries), from carène , from carina ; influenced by CAREER)
To cause (a vessel) to lean over so that she floats on one side, leaving the other side out of water and accessible for repairs below the water line; to case to be off the keel