a) Obstacle

Introduction

According to the ICAO Annex 15 definition, an Obstacle is defined as follows:

"Obstacle. All fixed (whether temporary or permanent) and mobile objects, or parts thereof, that:

a)    are located on an area intended for the surface movement of  aircraft; or
b)    extend above a defined surface intended to protect aircraft in flight; or
c)    stand outside those defined surfaces and that have been assessed as being a hazard to air navigation."

Due to the extent by which some requirements need to be discussed, the mapping of the "Obstacle" subject is divided into several parts. The first part contains the basic mapping of the overall obstacle properties (identification, type, effectivity, etc.) The second part contains the mapping of obstacle geometric and geographic properties. The third part contains the mapping of visual identification aspects, such as lighting, marking and material.