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Track keeping

Below is a breakdown of track keeping for westerly and easterly operations. This shows the proportion of departures that operated up to an altitude of 4000ft within the Noise Preferential Routes (NPRs).

Track keeping for westerly operations

Westerly departures routes

 

Monthly track keeping for westerly operations

2017 BPK % CPT % DET % MID % SAM % WOB %
January 99.2 99.7 89.9 96.8 99.7 99.6
February 99.0 99.9 95.7 98.5 99.8 99.8

 

2016 BPK % CPT % DET % MID % SAM % WOB %
January 99.3 99.9 93.0 97.3 99.1 98.9
February 99.0 99.7 92.1 97.2 99.8 99.2
March 98.5 98.7 91.2 95.7 99.8 98.8
April 98.1 98.6 94.5 96.7 99.0 97.1
May 98.8 99.7 93.0 94.5 99.6 97.1
June 96.9 97.1 95.1 95.6 98.0 96.6
July 97.6 99.2 95.8 96.8 99.7 98.6
August 98.0 99.7 95.2 97.0 99.3 99.0
September 97.3 99.5 95.1 96.3 99.5 98.4
October 98.5 99.1 91.2 95.0 99.2 99.1
November 99.0 99.9 89.3 95.6 99.7 99.5
December 98.5 99.6 95.5 97.4 100.0 99.8

 

Track keeping for easterly operations

Easterly departures routes

 

Monthly track keeping for easterly operations

2017 BPK % BUZ % CPT % DET % MID % SAM %
January 99.2 99.7 37.7 99.8 99.7 99.7
February 99.8 99.3 37.5 100.0 99.8 99.4

 

2016 BPK % BUZ % CPT % DET % MID % SAM %
January 99.5 99.0 17.9 99.4 99.6 92.7
February 99.7 99.4 47.7 99.6 99.8 97.8
March 99.3 99.2 60.0 99.9 99.5 99.7
April 99.7 99.8 42.1 99.6 100.0 99.2
May 99.2 98.8 45.3 99.7 99.0 98.7
June 98.0 98.0 47.8 99.4 96.8 98.6
July 99.4 96.9 30.6 99.5 100.0 97.3
August 99.9 98.8 36.6 99.8 100.0 98.2
September 99.6 99.3 34.8 100.0 100.0 98.1
October 99.8 99.4 48.4 99.8 100.0 99.1
November 99.5 100.0 44.5 99.7 99.6 99.0
December 99.8 97.5 30.9 100.0 100.0 99.6

 

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