Fall aboard : To fall aboard of, to strike or encounter another ship, when one or both are in motion; to be driven upon a ship by the force of the wind or current
William Falconer's Dictionary of the Marine, Glossary, Published by South Seas using the Web Academic Resource Publisher, London 1780. (http://threedecks.org/index.php?display_type=glos sary, (Mrtm - Brit) {583}