NABSA : An acronym for Not Afloat But Safely Aground. Used in many parts of the world to describe a berth in which the vessel is normally expected to take the bottom at some stage on the ebb tide
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}