The NAP lists the preferred flight paths as:

2.1 Preferred Flight Paths

All arriving and departing aircraft to track via a SID and STAR for aircraft above 5,700kg.

Adherence with this procedure is reported below.

The Preferred Flight Paths Report below shows a historically low adherence of arrivals to Runway 31 following the preferred flight paths. This means that aircraft that are arriving to the runway over water are not following the preferred arrival flight path.

Our investigation of this low adherence shows that while arriving aircraft are following the arrival path over land, many of the aircraft that are approaching from southern destinations often deviate from the arrival flight path when over water.

Noise abatement focuses on methods to minimise aircraft impacts over land. As this deviation from the arrival flight path is occurring over open water, the operation remains consistent with the intent of the preferred flight paths NAP, being to avoid populous areas.

We are working to modify the collation and reporting of this data to better reflect the on-ground experience of noise abatement.

The report is best viewed in full screen mode.

Note: Due to rounding, percentage values may not sum to exactly 100.0%. Minor discrepancies of up to ±1% are expected and do not indicate any errors in the underlying absolute figures, which remain accurate and unaffected.