Report aircraft proximity

What can you use this form for?

You can use this form for the report of an aircraft proximity (airprox).

An airprox is an occurrence in which, in the opinion of a pilot or air traffic personnel, the distance between aircraft as well as their relative positions and speed have been such that the safety of the aircraft involved may have been compromised.

Initial report

An initial report of an airprox should be made immediately by radio, prefixing the message with the word "Airprox". Initial reports must be confirmed within 72 hours by completing the full "airprox report" or an equivalent incident report form, as used by the ATS-unit or the company. Reporting should be done by or on behalf of a pilot or the ATS-personnel concerned.

Who can use the form?

Citizens and organisations.

What attachments do you need to add?

To support your report, you can add photos, screenshots or reports.

What happens with your report?

No disciplinary action shall be taken in the event of pilot or controller error. Because the fundamental objective of the investigation is prevention of an airprox. Not to apportion blame or liability, except in case of gross negligence.

The Dutch CAA (occurrence reporting bureau) determines the ‘occurrence class’ of the incident. In case of a serious incident the report will be forwarded to the Dutch Investigation board. It is the responsibility of the Dutch Investigation Board to decide if further investigation is necessary.

The trend for the reports which are classified as ‘incident’ will be closely monitored by the Dutch CAA. Corrective actions shall be taken by the authorities if necessary.

Additional information

You can obtain additional information about this form via telephone +31 88 489 00 00 or e-mail abl@ilent.nl.
Visiting address: Kingsfordweg 1, 1043 GN Amsterdam, the Netherlands

Form instructions

• Please complete this form in English.
• Fields marked with * are required.
• To save your progress, click ‘Save’ to download a file containing your completed information. If you want to continue later, click ‘Open’ and upload this file.

Please note: if you do not use the form for more than 12 minutes, your session will time out and you will need to start again. Make sure to save the form regularly.

Publication date

12-06-2025