Aeronautical Terms beginning with E
E-MSAW
En Route Minimum Safe Altitude Warning
EAS
En Route Automation System
EDCT
Expect Departure Clearance Time
EFC
Expect Further Clearance (Time)
ELT
Emergency Locator Transmitter
Emergency
A distress or an urgency condition.
Emergency Locator Transmitter
A radio transmitter attached to the aircraft structure which operates from its own power source on 121.5 MHz and 243.0 MHz. It aids in locating downed aircraft by radiating a downward sweeping audio tone, 2-4 times per second. It is designed to function without human action after an accident. [The 121.5 band is no longer monitored by satellite. The newest version uses 406.0MHz]
Emergency Safe Altitudes
Altitudes depicted on approach charts which provide at least 1,000 feet of obstacle clearance in nonmountainous areas and 2,000 feet of obstacle clearance in designated mountainous areas within a 100-mile radius of the navigation facility upon which the procedure is predicated and normally used only in military procedures. These altitudes are identified on published procedures as “Emergency Safe Altitudes.”
En Route Air Traffic Control Services
Air traffic control service provided aircraft on IFR flight plans, generally by centers, when these aircraft are operating between departure and destination terminal areas. When equipment, capabilities, and controller workload permit, certain advisory/assistance services may be provided to VFR aircraft.
En Route Automation System (EAS)
The complex integrated environment consisting of situation display systems, surveillance systems and flight data processing, remote devices, decision support tools, and the related communications equipment that form the heart of the automated IFR air traffic control system. It interfaces with automated terminal systems and is used in the control of en route IFR aircraft.
En Route Charts
Aeronautical Chart.
En Route Descent
Descent from the en route cruising altitude which takes place along the route of flight.
En Route Flight Advisory Service
A service specifically designed to provide, upon pilot request, timely weather information pertinent to his/her type of flight, intended route of flight, and altitude. The FSSs providing this service are listed in the Airport/Facility Directory.
En Route High Altitude Charts
Aeronautical Chart.
En Route Low Altitude Charts
Aeronautical Chart.
En Route Minimum Safe Altitude Warning
A function of the EAS that aids the controller by providing an alert when a tracked aircraft is below or predicted by the computer to go below a predetermined minimum IFR altitude (MIA).
En Route Spacing Program (ESP)
A program designed to assist the exit sector in achieving the required in-trail spacing.
En Route Transition
A. Conventional STARs/SIDs. The portion of a SID/STAR that connects to one or more en route airway/jet route.
B. RNAV STARs/SIDs. The portion of a STAR preceding the common route or point, or for a SID the portion following, that is coded for a specific en route fix, airway or jet route.
ESP
En Route Spacing Program
Established
To be stable or fixed on a route, route segment, altitude, heading, etc.
Estimated Elapsed Time [ICAO]
The estimated time required to proceed from one significant point to another.
Estimated Off-Block Time [ICAO]
The estimated time at which the aircraft will commence movement associated with departure.
Estimated Position Error (EPE)
A measure of the current estimated navigational performance. Also referred to as Actual Navigation Performance (ANP).
Estimated Time En Route
The estimated flying time from departure point to destination (lift-off to touchdown).
Estimated Time Of Arrival
The time the flight is estimated to arrive at the gate (scheduled operators) or the actual runway on times for nonscheduled operators.
ETA
Estimated Time Of Arrival
ETE
Estimated Time En Route
Execute Missed Approach
Instructions issued to a pilot making an instrument approach which means continue inbound to the missed approach point and execute the missed approach procedure as described on the Instrument Approach Procedure Chart or as previously assigned by ATC. The pilot may climb immediately to the altitude specified in the missed approach procedure upon making a missed approach. No turns should be initiated prior to reaching the missed approach point. When conducting an ASR or PAR approach, execute the assigned missed approach procedure immediately upon receiving instructions to “execute missed approach.”
Expect (Altitude) At (Time) Or (Fix)
Used under certain conditions to provide a pilot with an altitude to be used in the event of two-way communications failure. It also provides altitude information to assist the pilot in planning.
Expect Departure Clearance Time (EDCT)
The runway release time assigned to an aircraft in a traffic management program and shown on the flight progress strip as an EDCT.
Expect Further Clearance (Time)
The time a pilot can expect to receive clearance beyond a clearance limit.
Expect Further Clearance Via (Airways, Routes Or Fixes)
Used to inform a pilot of the routing he/she can expect if any part of the route beyond a short range clearance limit differs from that filed.
Expedite
Used by ATC when prompt compliance is required to avoid the development of an imminent situation. Expedite climb/descent normally indicates to a pilot that the approximate best rate of climb/descent should be used without requiring an exceptional change in aircraft handling characteristics.
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