Modern aviation infrastructure around the world is underpinned by sophisticated electronic equipment. This ranges from well-known apparatus like radar to lesser-known equipment such as Instrument Landing Systems (ILS), navigation beacons, Air-Ground-Air (AGA) communication towers and many more.
All electronic equipment produces electromagnetic fields. The strength and extent of these fields is dependent on technical parameters such as power output and also the level of shielding that exists around the electronic components.
Effort is often made to minimise emissions produced by commercial equipment due to concerns over safety and electromagnetic interference. However, it is impossible to remove these fields altogether which means the potential for interference always remains.
Examples of Electromagnetic Interference
Common examples of electromagnetic interference include mobile phones causing interference to music speakers when a text message is being received, or problems when operating two remote‑controlled cars next to each other.
Examples of electromagnetic interference include problems when operating two remote‑controlled cars in close proximity.
Even objects that do not produce electromagnetic fields can interfere with them – think of a building that blocks the radio signals between two walkie-talkies.
This presents a particular concern for aviation because of wide range of electronic equipment that is used and the fact that much of it is for passenger safety.
Assessments for Projects Near Airports
Proposals for any projects that will affect electromagnetic fields near an airport may therefore be subject to electromagnetic interference assessments. These can take many forms, depending on the system that is being introduced and the system that stands to be affected. Assessments are generally based on:
- Guidance from the airport or the relevant authority (such as the Civil Aviation Authority)
- Electromagnetic Compatibility (EMC) standards on commercial equipment
- Best practice from other sources including research groups or industry experts.
The safety aspects of electromagnetic interference should be considered at the design stage of proposed developments near airports.