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ATM network performance: Sydney

ATM Network Performance: Sydney

Airborne delay

The 75th percentile performance figures for airborne delay at Sydney are indicated in Figure 8. July performance for the median (0.4 minutes) and the 75th percentile (3.3 minutes) met the targets. Compared to the same month last year, there was an increase in the airborne delay performance for the median (from -0.2 minutes) and 75th percentile (from 2.2 minutes).

The long‑term (48-month) and 24-month trends for airborne delay at Sydney are upwards.

sydney-airborne-delay

Figure 8: Sydney airborne delay 75th percentile (last 24 months)

Notable events

Table 2 describes the notable airborne delay and other events during July in Sydney.

Day Local Time Delay

(minutes – 75th percentile)

Event Descriptions

(Contributing causes to increased delays)

3 July 07-09 5.8 Off-schedule internationals and non-compliant flights during morning peak.
4 July 17-19 7.0 Off-schedule internationals and non-compliant flights during and a go around during a period of low cloud.
6 July 06-07 5.4 Un-forecast fog at the aerodrome with low visibility procedures in place from 0530L. A Level 2 revision was conducted at 0550L with low arrival rates (15 planned and 22 achieved) for 06 and 07 hours. A majority of flights were already airborne at the time of the revision.
7 July 08-11 6.0 Un-forecast fog at the aerodrome with low visibility procedures in place from 0445L. An ad-hoc Level 2 was enacted at 0510 local. No approaches were made between 0810 and 0848 due to visibility below the minima. At 1005 an extension to the GDP was enacted to manage demand.
13 July 08-10 9.9 Off-schedule internationals during extended period of single runway operations and wind gusts.
14 July 15-18 6.7 Off-schedule internationals and non-compliant flights during extended period of single runway operations and strong winds. Level 1 revision conducted at 1600 local to extend period of single runway operations.
15 July 06-09 6.8 Off-schedule internationals during extended period of single runway operations. Multiple go-arounds due to turbulence.
23 July 05-06 2.3 International flights presenting prior to the end of curfew required delay.
27 July 06-07 2.0 International flights presenting prior to the end of curfew required delay.
28 July 08-10 5.8 SODPROPS was in effect for 6 hours with a rate of 24 leading to an increase in delays. No GDP was in effect.
30 July 05-06 4.3 International flights presenting prior to the end of curfew required delay.
31 July 05-06 6.7 International flights presenting prior to the end of curfew required delay.

Table 2: Notable event descriptions for Sydney.