Page 24 - PPL-engelsk 2025

Air Law

IAS (Indicated Air Speed)

IFR (Instrument Flight Rules)

Overtaking Aircraft – An aircraft approaching another aircraft from behind at
an angle of less than 70 degrees measured from the length axis of the overtaken

aircraft.

Interception – A military action against an aircraft, usually aimed at

determining its identity.

Clearance – Permission to perform air traffic operations in accordance with the

specific conditions issued by an air traffic control unit.

Controlled Aerodrome – An aerodrome where air traffic control services are

provided for aerodrome traffic.

Controlled Flight – Any flight for which a clearance has been issued.

Critical Phase – A collective term for uncertainty phase, alert phase, and

emergency phase.

MSL (Mean Sea Level)

Emergency Phase – A situation where there is reasonable certainty that an

aircraft and its occupants are in serious and imminent danger and require

immediate assistance. Code designation DETRESFA.

RCC (Rescue Coordination Centre) – A unit responsible for organizing search

and rescue services and coordinating search and rescue operations within a

search and rescue region.

TIA (Traffic Information Area) – A non-controlled airspace created in

conjunction with a TIZ, extending upwards from a defined boundary above the

earth's/water's surface to a defined upper boundary.

Service Hours – The period during which a public aerodrome provided

aerodrome and traffic services.

TMA (Terminal Control Area) – A control area created in connection with an

aerodrome.

Uncertainty Phase – A situation where there is uncertainty about the safety of

an aircraft and its occupants. Code designation INCERFA.

Flight Theory PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 24