What must be ensured regarding equipment when flying under ESCAT?

When flying under Emergency Security Control of Air Traffic (ESCAT), it is crucial that all navigation aids are operational. This requirement is in place to enhance safety and ensure effective communication, navigation, and surveillance of aircraft during heightened security conditions. When navigating in potentially congested or sensitive airspace, the functionality of navigation aids enables pilots to maintain situational awareness and adhere to air traffic control instructions seamlessly.

Operational navigation aids provide essential information about the aircraft's position and assist in maintaining safe flight paths, which is particularly important during emergencies or heightened security measures when conditions might be less predictable. It is vital for pilots to ensure that these systems are functioning prior to departure and throughout the flight to mitigate risks associated with loss of situational awareness or communication.