曝光台 注意防骗
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extends to 12 miles offshore.
DOWNBURST- A strong downdraft which induces
an outburst of damaging winds on or near the ground.
Damaging winds, either straight or curved, are highly
divergent. The sizes of downbursts vary from 1/2
mile or less to more than 10 miles. An intense
downburst often causes widespread damage. Damaging
winds, lasting 5 to 30 minutes, could reach speeds
as high as 120 knots.
DOWNWIND LEG-
(See TRAFFIC PATTERN.)
DP-
(See INSTRUMENT DEPARTURE PROCEDURE.)
DRAG CHUTE- A parachute device installed on
certain aircraft which is deployed on landing roll to
assist in deceleration of the aircraft.
DSP-
(See DEPARTURE SEQUENCING PROGRAM.)
DT-
(See DELAY TIME.)
DTAS-
(See DIGITAL TERMINAL AUTOMATION
SYSTEM.)
DUE REGARD- A phase of flight wherein an
aircraft commander of a State‐operated aircraft
assumes responsibility to separate his/her aircraft
from all other aircraft.
(See also FAAO JO 7110.65, Para 1-2-1, WORD
MEANINGS.)
DUTY RUNWAY-
(See RUNWAY IN USE/ACTIVE RUNWAY/DUTY
RUNWAY.)
DVA-
(See DIVERSE VECTOR AREA.)
DVFR-
(See DEFENSE VISUAL FLIGHT RULES.)
DVFR FLIGHT PLAN- A flight plan filed for a VFR
aircraft which intends to operate in airspace within
which the ready identification, location, and control
of aircraft are required in the interest of national
security.
DVRSN-
(See DIVERSION.)
DYNAMIC- Continuous review, evaluation, and
change to meet demands.
DYNAMIC RESTRICTIONS- Those restrictions
imposed by the local facility on an “as needed” basis
to manage unpredictable fluctuations in traffic
demands.
2/14/08 Pilot/Controller Glossary
PCG E-1
E
EAS-
(See EN ROUTE AUTOMATION SYSTEM.)
EDCT-
(See EXPECT DEPARTURE CLEARANCE
TIME.)
EFC-
(See EXPECT FURTHER CLEARANCE (TIME).)
ELT-
(See 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.
(Refer to 14 CFR Part 91.)
(Refer to AIM.)
E‐MSAW-
(See EN ROUTE MINIMUM SAFE ALTITUDE
WARNING.)
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.
(See AIR ROUTE TRAFFIC CONTROL
CENTER.)
(Refer to AIM.)
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.
(Refer to AIM.)
EN ROUTE CHARTS-
(See 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.
(See FLIGHT WATCH.)
(Refer to AIM.)
EN ROUTE HIGH ALTITUDE CHARTS-
(See AERONAUTICAL CHART.)
EN ROUTE LOW ALTITUDE CHARTS-
(See 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 TRANSITIONa.
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
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