Environmental Data Coding Specifcation        ISO IEC LogosRight Title Graphic
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Status: STD 2005/06/07
Code: 1166

Concept definition: A number identifying a quadrant of a <RUNWAY> OIS as defined by the centre-line of the <RUNWAY> and a perpendicular to the centre-line of the <RUNWAY> intersecting at the centre point of the <RUNWAY>. The centre point of the <RUNWAY> is defined as falling midway between the <RUNWAY_ENDPOINT>s. Quadrant identifiers are assigned such that quadrants 1 and 2 are on one side and quadrants 3 and 4 are on the other side of the centre-line of the <RUNWAY>. Quadrant identifiers only apply to the following imaginary air navigation OISs of <RUNWAY>s: inner horizontal, conical, and outer horizontal.
Attribute value type: INDEX
Reference type: IR
Reference: [FACC, Annex B: QUD]
Supplemental references:  

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