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6 – i ndex
Domestic Flight:
Aflight between twopointswithin theAustralianFIR.
Elevation:
The vertical distanceof apoint or a level, onor affixed to the
surfaceof the earth,measured frommean sea level.
EmergencyPhases:
• UncertaintyPhase: A situationwhereinuncertainty exists as to the
safetyof an aircraft and its occupants.
• Alert Phase: A situationwhere in apprehensionexists as to the
safetyof an aircraft and its occupants.
• Distress Phase: A situationwherein there is reasonable certainty
that an aircraft and its occupants are threatenedbygrave and
imminent danger or require immediate assistance.
EquivalentSingle IsolatedWheel Load:
Theequivalent load that
wouldbe imposedon apavement by a singlewheel if anywheel group
on anaircraftwere replacedby a singlewheel using the same tyre
pressure.
EssentialRadioNavigationService:
A radionavigation service
whosedisruptionhas a significant impact onoperations in theaffected
airspaceor aerodrome.
Estimate:
The time atwhich it is estimated that anaircraftwill beover a
position reportingpoint or over thedestination.
EstimatedElapsedTime (EET):
The estimated time required to
proceed fromone significant point to another.
EstimatedOffBlockTime:
The estimated timeatwhich theaircraft
will commencemovement associatedwithdeparture.
EstimatedTimeofArrival (ETA):
For IFRflights, the timeatwhich
it is estimated that the aircraftwill arriveover that designatedpoint,
definedby reference tonavigation aids, fromwhich it is intended
that an instrument approachprocedurewill be commenced, or, if no
navigation aid is associatedwith the aerodrome, the timeatwhich
the aircraftwill arriveover the aerodrome. For VFRflights, the time at
which it is estimated that the aircraftwill arriveover the aerodrome.
ExpectedApproachTime (EAT):
The timeatwhichATCexpects that an
arriving aircraft, followingadelay, will leave theholdingfix to complete
its approach for a landing.
definitions