The 75th percentile performance figures for airborne delay at Melbourne are indicated in Figure 9.
March performance for the median (1.5 minutes) and the 75th percentile (5.3 minutes) did not meet the targets. Compared to the same month last year, there was an increase in the airborne delay median performance (from 1.0 minutes) and 75th percentile performance (from 4.4 minutes).
The long‑term (48-month) and 24-month trends for airborne delay at Melbourne are upwards.
Figure 9: Melbourne airborne delay 75th percentile (last 24 months)
Table 4 describes the notable airborne delay events during March in Melbourne.
(minutes – 75th percentile)
(Contributing causes to increased delays)
|01 March||10-12 &
|16.2||Concentration of demand in the late morning due to late non-compliant and off schedule international flights during a low capacity period (extended single runway operations).
Reduced capacity in the afternoon and evening due to thunderstorms. Tactical rates reduced at 1700L and Level 2 GDP Revision at 1935Lwith rates reduced.
|05 March||18-19||4.6||Increased delay in the peak evening period due to deviations around thunderstorms.|
|07 March||18-19||4.2||Concentration of demand due to late non-compliant flights and reduced capacity due to single runway operations extending longer than planned.|
|15 March||18-19||7.8||Concentration of demand due to late non-compliant flights during low capacity period (single runway operations).|
|17 March||08-09 &
|6.6||Reduced capacity in peak morning period due to fog. Tactical rates reduced.
Concentration of demand during the peak evening period due to late non-compliant flights.
|18 March||07-08||6.4||Concentration of demand during the peak morning period due to late non-compliant and off‑schedule international flights.|
|19 March||18-19||6.1||Reduced capacity during the peak evening period due low cloud. Tactical rates reduced.|
|20 March||11-12 &
|11.1||Reduced capacity in the morning due to low cloud. Level 2 GDP Revision with rates reduced.
Reduced capacity due to single runway operations extending longer than planned.
|22 March||07-10 &
|19.4||Concentration of demand during morning due to late non-compliant and off-schedule international flights.
Reduced capacity in the afternoon and evening due to thunderstorms. Multiple periods with no approaches and several runway changes.
|29 March||08-10 &
|13.8||Concentration of demand due to off-schedule internationals during busy morning period.
Reduced capacity during evening peak period due to strong winds. Limited approaches for 25 minutes.
Table 4: Notable event descriptions for Melbourne.