Rigid - Inflatable Boat : An open or decked boat that: (a) has a rigid bottom structure; and (b) has inflatable sides that chiefly ensure the intact buoyancy of the boat; and (c) is propelled by an engine
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}