An enclosed area of water with a gate at each end. Water can be let in or out to raise or lower vessels from one level to the next through a canal or around a dam
Association of Marine Underwriters of San Francisco (AMUSF), Glossary of Marine Insurance and Shipping Terms, http://www.amusf.com/Definitions_A.htm, CA, USA 2011. (Mrtm Insur and Shipping - Amer) {575}