(2)
ALERT PHASE - A situation wherein apprehension exists as to the safety of an aircraft and its occupants.
(3)
DISTRESS PHASE - A situation wherein there is reasonable certainty that an aircraft and its occupants are threatened by grave and imminent danger or require immediate assistance.
EMERGENCY SAFE ALTITUDE - (See Minimum Safe Altitude)
E-MSAW - (See Enroute Minimum Safe Altitude Warning)
ENROUTE AIR TRAFFIC CONTROL SERVICES - Air Traffic Control service provided aircraft on an IFR flight plan, 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. (See NAS Stage A, Air Route Traffic Control Center)
ENROUTE AUTOMATED RADAR TRACKING SYSTEM/EARTS -An automated radar and radar beacon tracking system. Its functional capabilities and design are essentially the same as the terminal ARTS IIIA system except for the EARTS capability of employing both short-range (Airport Surveillance Radar) and long-range (ARSR) radars, use of full digital radar displays, and fail-safe design. (See Automated Radar Terminal System/ARTS)
ENROUTE CHARTS - (See Aeronautical Charts)
ENROUTE DESCENT - Descent from the enroute cruising altitude which takes place along the route of flight.
ENROUTE DELAY- (See Filed Enroute Delay)
ENROUTE DELAY FLIGHT PLANS (FEDERAL AVIATION ADMINISTRATION N 7110.547) - A flight plan for flights that proceed to an airport, an area, or geographical point for enroute delay(s) before proceeding to the next intermediate point for final destination.
ENROUTE FLIGHT ADVISORY SERVICE/FLIGHT WATCH - A service specifically designed to provide, upon pilot request, timely weather information pertinent to his type of flight, intended route of flight and altitude. (See Flight Watch)
ENROUTE MINIMUM SAFE ALTITUDE WARNING/E-MSAW - A function of the NAS Stage A enroute computer that aids the controller by alerting him when a tracked aircraft is below or predicted by the computer to go below a predetermined minimum IFR altitude (MIA).
ESTABLISHED - To be stable or fixed on a route, route segment, altitude, heading, etc.
ESTIMATED ELAPSE TIME (ICAO) - The estimated time required to proceed from one significant point to another (for use in international flight planning). (See Total Estimated Elapsed Time).
ESTIMATED OFF-BLOCK TIME (ICAO) - The estimated time at which the aircraft will commence movement associated with departure (for use in international flight planning).
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 Air Traffic Control. 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 Airport Surveillance Radar or Precision Approach Radar 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.
EXPECTED DEPARTURE CLEARANCE TIME/EDCT - The runway release time assigned to an aircraft in a controlled departure time program and shown on the flight progress strip as an EDCT.
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