Effective acceptance bandwidth. The range of frequencies with respect to the assigned frequency for which reception is assured when all receiver tolerances have been taken into account.
Effective adjacent channel rejection. The rejection that is obtained at the appropriate adjacent channel frequency when all relevant receiver tolerances have been taken into account.
Effective intensity. The effective intensity of a flashing light is equal to the intensity of a fixed light of the same colour which will produce the same visual range under identical conditions of observation.
Elevation. The vertical distance of a point or a level, on or affixed to the surface of the earth, measured from mean sea level.
Elevated heliport. A heliport located on a raised structure on land.
Ellipsoid height (Geodetic height). The height related to the reference ellipsoid, measured along the ellipsoidal outer normal through the point in question.
Electronic aeronautical chart display. An electronic device by which flight crews are enabled to execute, in a convenient and timely manner, route planning, route monitoring and navigation by displaying required information.
Emergency locator transmitter (ELT). A generic term describing equipment which broadcast distinctive signals on designated frequencies and, depending on application, may be automatically activated by impact or be manually activated. An ELT may be any of the following:
Emergency phase. A generic term meaning, as the case may be, uncertainty phase, alert phase or distress phase.
End-to-end. Pertaining or relating to an entire communication path, typically from
(1) the interface between the information source and the communication system at the
transmitting end to
(2) the interface between the communication system and the information user or
processor or application at the receiving end. End-user. An ultimate source and/or
consumer of information.
End system (ES). A system that contains the OSI seven layers and contains one or more end user application processes.
Energy per symbol to noise density ratio (Es/No). The ratio of the average energy transmitted per channel symbol to the average noise power in a 1 Hz bandwidth, usually expressed in dB. For A-BPSK and A-QPSK, one channel symbol refers to one channel bit.
En-route alternate. An aerodrome at which an aircraft would be able to land after experiencing an abnormal or emergency condition while en route.
Entity. An active element in any layer which can be either a software entity (such as a process) or a hardware entity (such as an intelligent I/O chip).
Equivalent airspeed means the calibrated airspeed of an aircraft corrected for adiabatic compressible flow for the particular altitude. Equivalent airspeed is equal to calibrated airspeed in standard atmosphere at sea level.
Equivalent isotropically radiated power (e.i.r.p). The product of the power supplied to the antenna and the antenna gain in a given direction relative to an isotropic antenna (absolute or isotropic gain).
Estimated off-block time. The estimated time at which the aircraft will commence movement associated with departure.
Estimated time of arrival. For IFR flights, the time at which it is estimated that the aircraft will arrive over that designated point, defined by reference to navigation aids, from which it is intended that an instrument approach procedure will be commenced, or, if no navigation aid is associated with the aerodrome, the time at which the aircraft will arrive over the aerodrome. For VFR flights, the time at which it is estimated that the aircraft will arrive over the aerodrome.
ETOPS – Extended Range Twin-Engine Operations. Means twin-engine, turbine powered airplane operations conducted over specified routes that contain a point further than 60 minutes flying time from an adequate alternate airport, at the aircraft’s specified single engine cruise speed, as determined for standard atmospheric conditions, in still air.
ETOPS en-route alternate. A suitable and appropriate alternate aerodrome at which an aeroplane would be able to land after experiencing an engine shutdown or other abnormal or emergency condition while en route in an ETOPS operation.
Exception. A provision in this Annex which excludes a specific item of dangerous goods from the requirements normally applicable to that item.
Exemption. An authorization issued by an appropriate national authority providing relief from the provisions of this part.
Expected approach time. The time at which ATC expects that an arriving aircraft, following a delay, will leave the holding point to complete its approach for a landing.
External equipment (helicopter). Any instrument, mechanism, part, apparatus, appurtenance, or accessory that is attached to or extends from the helicopter exterior but is not used nor is intended to be used for operating or controlling a helicopter in flight and is not part of an airframe or engine.
Extended range operation. Any flight by an aeroplane with two turbine power-units where the flight time at the one power-unit inoperative cruise speed (in ISA and still air conditions), from a point on the route to an adequate alternate aerodrome, is greater than the threshold time approved by the State of the Operator.
Extended over water operation means –
A flight is considered to be in extended over water operations, when it extends beyond the point where special equipment, procedures and/or passenger briefings are required for such operations and specific times and distances can be determined for each aircraft type in CASR 135.351 for aeroplanes and 135.353 for helicopters. Also see CASR Part 91.509 :
(1) With respect to aircraft other than helicopters, an operation over water at a horizontal distance
A flight is considered to be in extended over water operations, when it extends beyond the point where special equipment, procedures and/or passenger briefings are required for such operations and specific times and distances can be determined for each aircraft type in CASR 135.351 for aeroplanes and 135.353 for helicopters. Also see CASR Part 91.509 :
(1) With respect to aircraft other than helicopters, an operation over water at a horizontal distance
of more than 50 nautical miles from the nearest shoreline; and
(2) With respect to helicopters, an operation over water at a horizontal distance of more than
50 nautical miles from the nearest shoreline and more than 50 nautical miles from an
offshore heliport structure.
External Load – a load that is carried, or extends, outside of the aircraft fuselage or any cargo load carried by an aircraft which falls into one of the following four load classes:
(1) Class A is an external cargo load that cannot move freely cannot be jettisoned and does
not extend below the landing gear.
(2) Class B is an external cargo load that can be jettisoned and is lifted free of the land and/or water.
(3) Class C is an external cargo load that can be jettisoned and remains in contact with the
land or water during the rotorcraft operation.
(4) Class D is an external cargo load other than Class A, B, or C external loads.
External load attaching means the structural components used to attach an external load to an aircraft, including external load containers, the backup structure at the attachment points, and any quick release device used to jettison the external load.
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