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GCAA PPL Air Law study materials
GCAA PPL Air Law study resources

GCAA PPL Air Law: Airspace Classification and ATC Clearances

GCAA PPL Air Law · Work through your exam, one topic at a time.

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Airspace Classification and ATC Clearances

The classes

ICAO classes A to G describe who gets a service and who is separated from whom.

  • A: IFR only; all aircraft separated; clearance required.
  • B: IFR and VFR; everything separated from everything.
  • C: IFR separated from IFR and VFR; VFR separated from IFR and given traffic information about other VFR.
  • D: IFR separated from IFR; VFR gets traffic information about all; both need clearance.
  • E: IFR separated from IFR; VFR needs no clearance but receives traffic information about IFR.
  • F: advisory; IFR separated from IFR as far as practical.
  • G: uncontrolled; no clearance, no separation service.

UAE controlled airspace is published in AIP ENR 2 and on AD charts; CTRs, CTAs and TMAs sit inside the Emirates FIR (OMAE) and are typically class C or D.

What a clearance is

A clearance authorises you to proceed under specified conditions - it is not permission to break a rule and not a guarantee against unknown VFR traffic in class D or E. It contains, as applicable: identity, clearance limit, route, level, speed or heading. Readback is required for route clearances, levels, headings, speeds, runway, frequency and hold-short instructions. "Line up and wait" is not a take-off clearance. Conditional clearances ("behind the landing A320, line up behind") must identify the preceding traffic and are never issued to an aircraft already on the runway.

Worked example

"A6-ABC, cleared to enter the control zone, not above 1,500 ft, report at the golf course." You read back all three elements. Entering at 1,500 ft complies; entering at 2,000 ft is a level bust even though you were "cleared in". If you are then told "hold at the golf course", you do not proceed into the CTR until you report and are cleared onwards.

Traps that cost marks

  • Believing a class D clearance gives separation from VFR traffic; it gives traffic information only.
  • Treating an airways clearance as authority to enter any control zone along the route.
  • Reading back only the level and omitting the frequency or the hold-short instruction.
  • Leaving an assigned level without ATC approval except for an emergency, a TCAS resolution advisory or a windshear escape - then telling ATC immediately.