Obstacle 1 : [Aviation industry] All fixed and mobile objects, or parts thereof, that may obstruct either the movement of an aircraft on the ground or protrude into an aircrasft's takeoff or landing path
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}