Category: Understanding aircraft noise

Welcome to our Airspace & Noise Information Portal that provides a combination of general information about how our airport and airspace works, featuring a number of videos and animations.

When entering the website for the first time you need to enter your location. You can do this by entering your address or dropping a pin on a map. Once entered, the website will then tailor the location specific data to you. You can always change your location using the “select location” button in the top right corner.

Once you’ve entered your postcode, the pages within the Airspace data and Your area sections will adjust. This includes a number of dashboards that show you information about the airport and the flights in and around your area.

There are a number of options available to filter and explore data by using the buttons available at the top of the dashboard with the date period available in a drop-down menu the top right-hand corner.

Whilst not tailored to your local area, our noise monitoring dashboard shows the location of the local monitors with additional information available through our detailed dashboard. Once you’re on the detailed dashboard you just need to select your nearest monitor from the drop-down selection in the top right corner of the dashboard.

We hope you enjoy using our portal.

Watch the video below to find out about how aircraft arrive and depart using the airspace around London Gatwick:

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It is important for the safe operation of aircraft that they both land and take-off into wind. On take-off, this will reduce the ground speed required to produce the lift to get airborne. On landing, it will again result in a lower groundspeed which significantly improves the safety margins in this critical phase of flight.

When the wind is from west to east, the airport will operate “westerly operations”. Aircraft will approach London Gatwick from the east and depart towards the west. The opposite, “easterly operations”, are used when the wind blows east to west. In recent years, on average around 70% of aircraft operations have been in a westerly direction and around 30% in an easterly direction. However this ratio does fluctuate, and weather conditions may mean prolonged periods of one operation or another.

The direction of operation is something which is considered carefully by Air Traffic Control in the interests of safe operations, giving consideration to wind on the runway and at 1,000ft and 2,000ft, the initial stages of take-off and the final stages of approach along with the forecast for the next four to six hours. The position is kept under review and any changes made in the light of all relevant factors at the time. The local weather forecast is not always a reliable indicator for what is happening at London Gatwick since it only reports the conditions at ground level.

The westerly and easterly operational directions are schematically outlined below:

Arriving aircraft do not have defined routes to follow and are provided with instructions from Air Traffic Control who ensure the aircraft are safely spaced whilst being directed to land at London Gatwick. A number of factors affect where arrivals fly and the location of flight paths may vary significantly between different days and even during the day.

There are various noise abatement procedures in force to minimise the impact of arriving aircraft. One of the main noise abatement measures is Continuous Descent Operations (CDO), sometimes referred to as CDA (A for approach). By avoiding level flight segments and drastic speed reductions, the use of thrust and speed brakes is minimised which subsequently reduces noise emissions. Compliance with this procedure is monitored as part of our reporting.

On occasion, often at busy times or during adverse weather, it will not be possible for aircraft to approach and land at London Gatwick without having to undertake short term holding. This takes place in fixed oval pattern known as a stack or hold. London Gatwick has two holding stacks; one called ‘WILLO’ which is located west of Lewes and above Burgess Hill and the second, ‘TIMBA’ is located above Heathfield. The stacks have been in the same locations since the 1960s. NATS is responsible for the location of the stacks and they cannot be moved without an airspace change and public consultation. The minimum altitude of aircraft in the stack is 7,000ft and is set to keep noise on the ground as low as possible.

You can find out more about how arriving aircraft approach London Gatwick by watching this short video or by downloading our information pack:

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Arrivals and holding video:​​

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Information packs:

Departures are required to follow specific routes which were set by the Government back in the 1960s, these routes are called Noise Preferential Routes or NPRs. These routes are shown in the images below.

Pilots and Air Traffic Control are required to maintain departures inside the Noise Preferential Route until 3,000 or 4,000ft depending on the route in question. Once this altitude is reached, Air Traffic Control are able to direct aircraft off the Noise Preferential Routes towards their destination.

Our Noise Preferential Routes or NPRs:

At certain times, Air Traffic Control may vector an aircraft outside the Noise Preferential Route to avoid adverse weather, such as thunderstorms, or other traffic in the vicinity. This may result in aircraft flying over areas they do not normally do. Our flight tracker has a rainfall layer that can show areas of intense weather than pilots often avoid.

An example of an aircraft avoiding bad weather:

Our Airspace Office reports tracks departing aircraft and reports on how may aircraft remain inside the Noise Preferential Route up to the minimum vectoring altitude. However, there are no financial sanctions against airlines that fly off track as there are many factors, including speed, wind, weight and temperature that can affect the performance of an aircraft.

You can find out more about how aircraft depart London Gatwick by watching this short video or by downloading our information pack at the bottom of this page.

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Departures video:

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Information pack:

There is not, and never has been, a ban on flights operating to and from London Gatwick at any time of the night. However, in order to try to balance the interests of the all local communities and those of the airport users, for instance passengers, freight, time sensitive goods, aircraft emergencies and business, there are stringent restrictions and rules in place governing how the airport manages night time flights.

The Department for Transport (DfT) is responsible for defining these restrictions which are based on movements and quota count (QC). QC is a classification based on certified noise levels which allocates a certain amount of points (0-16) to an aircraft – the louder the aircraft, the higher its QC. The loudest aircraft types (QC8, QC16) are prohibited from operating during the night period (23:00 – 07:00) and QC4 aircraft may not be scheduled to operate during this time. During the night quota period between 23:30 and 06:00 the airport may facilitate a​ set number movements and quota count. The restrictions are divided into summer and winter seasons, which are in turn linked to daylight savings (BST/GMT). London Gatwick has an allowance of 11,200 movements and 5,150 QC in summer, and 3,250 movements and 1,785 QC in winter. These limits are designed to encourage the use of the quietest aircraft types within a limited number of movements.

The Airspace Office proactively monitors and works with airlines to manage their compliance with all Government restrictions and has no authority to alter these restrictions. All reporting is published on our noise website and through GATCOM and NaTMAG.

If flight crew or Air Traffic Control are not completely satisfied that the aircraft is positioned and configured for a safe landing a go-around is initiated. This is a safe and standard aircraft manoeuvre which may be executed at any stage of the approach and simply discontinues an approach to landing to ensure passengers and aircraft are not placed in potentially dangerous situations.

The go-around procedure involves aircraft turning south away from the airport before they are directed by Air Traffic Control back into the sequence for landing. This may mean that aircraft performing a go-around could overfly areas they do not normally do at potentially lower than expected altitudes.

Our Airspace Office reports on the number of go-arounds and the reasons why they occur, you can read these reports here.

You can find out more about go-arounds by watching this short video or by downloading our information pack below:

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Go-around video: ​​​​​​​​

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Information pack:

If you live close to the airport, you may hear noise from aircraft operating on the ground, this can occur due to:

• Aircraft traveling between the runway and stands (their ‘parking space’).
• Using reverse thrust to increase braking during landing.
• Aircraft on their stands with their power units running.
• Engine testing after maintenance.

At London Gatwick, we work closely with Air Traffic Control, airlines, ground handlers and engineering teams to manage ground noise. In particular at London Gatwick we:

• Have strict controls on engine testing and has enforced limits for the maximum number of tests that can take place over a rolling 6 month period.
• Work with Air Traffic Control to cut down the amount of time that aircraft wait to take off, or are taxiing, so that the engines aren’t running for longer than they should be.
• Work with our airline partners to support the use of single or reduced engine taxi procedures.
• Provide electrical ground power and air conditioning units to remove the need to keep noisy aircraft auxiliary power units running when on stands.
• Encourage pilots not to use reverse thrust (a way of slowing aircraft down once they have landed) on landing between 23:00 and 06:00, except in the interests of safety.

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Ground noise video:

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​Information pack: