Consultation by NATS

Relevant parts of the consultation document

Areas of interest

This location falls within the airspace used by flights to Gatwick Airport where we are proposing changes above 7,000ft. Select the next tab to learn more about today’s air traffic patterns.

Today's flights

The map below shows where today’s air traffic flies. Click the options above to see maps showing Gatwick Airport (LGW) flight paths or flight paths to/from all airports. You can also highlight the boundaries of National Parks and Areas of Outstanding Natural Beauty (AONB). Select the next tab to see our consultation swathes.

This figure illustrates all today’s flight paths from a normal week; the coloured shading indicates the average number of flights. The figure shows flight paths for all the flights in the region, including those to/from Heathrow which is the region’s busiest airport; we have provided this information because this other traffic may be noticed, and so that you can understand the overall traffic pattern. You will see that no overland areas in the region are completely free of aircraft flying overhead.

These plots show all flights, not just those above 7,000ft. We have not limited the altitude of the plots because aircraft below 7,000ft may be noticed in and around the area of interest, and because we want to give you a sense of the overall traffic pattern – where flights are going to and coming from.

Today's flights

The map below shows where today’s air traffic flies. Click the options above to see maps showing Gatwick Airport (LGW) flight paths or flight paths to/from all airports. You can also highlight the boundaries of National Parks and Areas of Outstanding Natural Beauty (AONB). Select the next tab to see our consultation swathes.

This figure illustrates all today’s flight paths from a normal week; the coloured shading indicates the average number of flights. The figure shows flight paths for all the flights in the region, including those to/from Heathrow which is the region’s busiest airport; we have provided this information because this other traffic may be noticed, and so that you can understand the overall traffic pattern. You will see that no overland areas in the region are completely free of aircraft flying overhead.

These plots show all flights, not just those above 7,000ft. We have not limited the altitude of the plots because aircraft below 7,000ft may be noticed in and around the area of interest, and because we want to give you a sense of the overall traffic pattern – where flights are going to and coming from.

Today's flights

The map below shows where today’s air traffic flies. Click the options above to see maps showing Gatwick Airport (LGW) flight paths or flight paths to/from all airports. You can also highlight the boundaries of National Parks and Areas of Outstanding Natural Beauty (AONB). Select the next tab to see our consultation swathes.

This figure illustrates today’s Gatwick Airport flight paths from a normal week; the coloured shading indicates the average number of flights.

The black arrows illustrate the general direction of the predominant departure flows above 7,000ft. The blue arrows show the same for arrivals. Arrivals head towards the holds, shown as the circuits from where they descend below 7,000ft and head towards the runway. These arrows are provided for background information only; responding to this consultation does not require an in-depth knowledge of the flow of air traffic.

These plots show all flights, not just those above 7,000ft. We have not limited the altitude of the plots because aircraft below 7,000ft may be noticed in and around the area of interest, and because we want to give you a sense of the overall traffic pattern – where flights are going to and coming from.

Runways can operate in either direction – with aircraft taking off/landing to the west or the east.  The traffic shown cover a period when both westerly and easterly operations occurred; runway direction is primarily a factor to traffic patterns at lower altitudes.

Today's flights

The map below shows where today’s air traffic flies. Click the options above to see maps showing Gatwick Airport (LGW) flight paths or flight paths to/from all airports. You can also highlight the boundaries of National Parks and Areas of Outstanding Natural Beauty (AONB). Select the next tab to see our consultation swathes.

This figure illustrates today’s Gatwick airport flight paths from a normal week; the coloured shading indicates the average number of flights.

These plots show all flights, not just those above 7,000ft. We have not limited the altitude of the plots because aircraft below 7,000ft may be noticed in and around the area of interest, and because we want to give you a sense of the overall traffic pattern – where flights are going to and coming from.

Runways can operate in either direction – with aircraft taking off/landing to the west or the east.  The traffic shown cover a period when both westerly and easterly operations occurred; runway direction is primarily a factor to traffic patterns at lower altitudes.

Consultation swathes

This map shows the arrivals for Gatwick Airport above 7,000ft. You can see the departures for Gatwick Airport by selecting the toggles above.

The coloured areas show the swathes within which we need to position a route. More information can be found in the additional notes box. Select the next tab for information on aircraft noise, or click the links to the consultation document above for more detail.

Additional notes

The coloured shading on the map defines the consultation swathe for positioning the Gatwick Airport Point Merge route system above 7,000ft.

The final positions of the routes within these areas will be determined after consultation feedback has been analysed.  The position of the routes will determine how areas within the shaded regions are impacted; areas beneath the final routes would expect more overflights than today, and areas away from the routes would expect fewer.

Table D1 shows the potential number of flights that could pass directly overhead if the route was positioned overhead.  This is a pessimistic prediction as the numbers shown are for the busiest individual route and it assumes all aircraft are kept on the route in question rather than being vectored off it by air traffic control; which in reality would occur some of the time.   

Route 2016 2020 2025
Arrival daytime (0700-2300) 20 21 23
Arrival night time (2300-0700) 4 4 5

Table D1: Forecast for route usage (all Gatwick air traffic) – numbers are hourly averages – for a detailed traffic breakdown see Appendix G

Table D2 provides Lmax noise information for the typical and noisiest aircraft regularly flying to/from Gatwick.  More noise information can be found in Appendix J.  Lmax is the maximum noise at ground level from an aircraft flying directly overhead.  The Lmax values may be compared to Table D3 for everyday equivalents.   Additional overflight videos are provided on the webpage to help stakeholders understand what aircraft at various altitudes may look and sound like.

 

Aircraft type % 7,000- 8,000ft 11,000– 12,000ft 15,000- 16,000ft
Typical Arrival
A320/B737 series[1]
72.2% 55 – 56 dBA <55dBA <55dBA
Noisiest Arrival
B747-400
1.5% 57 – 59 dBA <55dBA <55dBA

Table D2: Typical Noise (Lmax) at various heights[2]

 

Noise Noise level (dBA)
Chainsaw, 1m distance 110
Disco, 1m from speaker 100
Diesel truck pass-by, 10m away 90
Kerbside of busy road, 5m away 80
Vacuum cleaner, distance 1m 70
Conversational speech, 1m 60
Quiet office 50
Room in quiet, suburban area 40
Quiet library 30

Table D3: Tables of Lmax Equivalents

 

Source: Airports Commission, based substantially on www.sengpielaudio.com/TableOfSoundPressureLevels.htm


[1] Includes the following aircraft types: Airbus A318/319/320/321, Boeing 737-600/700/800/900 (Ancon category, 125-180 seat single-aisle 2-eng jet)

[2] This table shows Lmax at a height above ground level.  Local elevation should be taken into account.

Consultation swathes

This map shows the departures for Gatwick Airport above 7,000ft. You can see the arrivals for Gatwick Airport by selecting the toggles above.

The coloured areas show the swathes within which we need to position a route. More information can be found in the additional notes box. Select the next tab for information on aircraft noise, or click the links to the consultation document above for more detail.

Additional notes

The coloured shading denotes the consultation swathes for positioning the Gatwick Airport departure routes heading over the south coast.

The final positions of the routes within these areas will be determined after consultation feedback has been analysed.  The position of the routes will determine how areas within the shaded regions are impacted; areas beneath the final routes would expect more overflights than today, and areas away from the routes would expect fewer.

Table D4 shows the potential number of flights that could pass directly overhead if the route was positioned overhead.  This is a pessimistic prediction as the numbers shown assume all aircraft are kept on the route in question rather than being vectored off it by air traffic control; which in reality would occur some of the time.  A detailed traffic breakdown is provided in Appendix G.

 

Route 2016 2020 2025
Southbound departure route daytime (0700-2300) 6 6 7
Southbound departure route night time (2300-0700) 2 2 2

Table D4: Forecast for route usage (all Gatwick air traffic) – Numbers are hourly averages

 

 

Table D5 provides Lmax noise information for the typical and noisiest aircraft regularly flying to/from Gatwick.  More noise information can be found in Appendix J.  Lmax is the maximum noise at ground level from an aircraft flying directly overhead.  The Lmax values may be compared to Table D6 for everyday equivalents.    Additional overflight videos are provided on the webpage to help stakeholders understand what aircraft at various altitudes may look and sound like.

 

Aircraft type % of flights 7,000- 8,000ft 12,000– 13,000ft 15,000- 16,000ft
Typical Departure
A320/B737 series[1]
72.2% 58 – 59 dBA 55 – 56 dBA <55dBA
Noisiest Departure
B747-400
1.5% 64 – 67dBA 58 – 59 dBA 57 dBA

Table D5: Typical Noise (Lmax) at various heights[2]

 

 

Noise Noise level (dBA)
Chainsaw, 1m distance

110

Disco, 1m from speaker

100

Diesel truck pass-by, 10m away

90

Kerbside of busy road, 5m away

80

Vacuum cleaner, distance 1m

70

Conversational speech, 1m

60

Quiet office

50

Room in quiet, suburban area

40

Quiet library

30

Table D6: Tables of Lmax Equivalents

 

Source: Airports Commission, based substantially on www.sengpielaudio.com/TableOfSoundPressureLevels.htm



[1] Includes the following aircraft types: Airbus A318/319/320/321, Boeing 737-600/700/800/900 (Ancon category, 125-180 seat single-aisle 2-eng jet)

[2] This table shows Lmax at a height above ground level.  Local elevation should be taken into account. See footnote 21

Noise

We have provided videos that aim to illustrate aircraft flying overhead at various altitudes; these include a range of aircraft types. For detailed noise tables see Appendix J of the consultation document or click the links to the consultation document above for more detail on the proposal.

Noise

We have provided videos that aim to illustrate aircraft flying overhead at various altitudes; these include a range of aircraft types. For detailed noise tables see Appendix J of the consultation document or click the links to the consultation document above for more detail on the proposal.

Noise

We have provided videos that aim to illustrate aircraft flying overhead at various altitudes; these include a range of aircraft types. For detailed noise tables see Appendix J of the consultation document or click the links to the consultation document above for more detail on the proposal.

Noise

We have provided videos that aim to illustrate aircraft flying overhead at various altitudes; these include a range of aircraft types. For detailed noise tables see Appendix J of the consultation document or click the links to the consultation document above for more detail on the proposal.