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Pilot/Controller Glossary 7/31/08, m/ s( X" O, N- H# b3 c7 f
PCG-1
9 y) f, [# r) a6 k3 V! v$ pPILOT/CONTROLLER5 \& a8 b. F9 W% a$ l
GLOSSARY- x' [8 F- ~) h/ r, K; ^7 H
PURPOSE% w4 M! }& l9 e
a. This Glossary was compiled to promote a common understanding of the terms used in the Air Traffic
8 w& Y. ?+ m0 f! p+ ]Control system. It includes those terms which are intended for pilot/controller communications. Those terms8 I! U6 T* L* m2 J& L
most frequently used in pilot/controller communications are printed in bold italics. The definitions are primarily: o0 d) [% r$ T* i( W% z
defined in an operational sense applicable to both users and operators of the National Airspace System. Use of
% y* r# \2 N$ @the Glossary will preclude any misunderstandings concerning the system's design, function, and purpose.
# \' O5 q1 A) U, D* cb. Because of the international nature of flying, terms used in the Lexicon, published by the International
- T7 E, I+ w) w* ZCivil Aviation Organization (ICAO), are included when they differ from FAA definitions. These terms are/ m& y G' l, U' U& k
followed by “[ICAO].” For the reader's convenience, there are also cross references to related terms in other parts
, M2 }% t7 G5 i* A0 Cof the Glossary and to other documents, such as the Code of Federal Regulations (CFR) and the Aeronautical
4 [5 b- v Z/ H, oInformation Manual (AIM).$ S j, y' Z8 O! a# C# w$ y$ p% s
c. This Glossary will be revised, as necessary, to maintain a common understanding of the system.
2 J' f/ Y) _8 QEXPLANATION OF CHANGES" s: |/ P P1 ^0 l+ v9 U- t2 m
a. Terms Added:1 K* ~3 `2 s, C: ]
AUTOMATIC FLIGHT INFORMATION SERVICE (AFIS) - ALASKA FSS ONLY! f0 p; M- }+ S6 _- g4 ^
b. Editorial/format changes were made where necessary. Revision bars were not used due to the insignificant
6 z3 E; V' A- G$ L# \nature of the changes.
, S9 R* m9 p3 B/ ?3 E; m/ GPilot/Controller Glossary 2/14/08
5 U8 n$ C/ D4 cPCG A-1, P, d8 f8 J; Q. H( D1 n% m
A
2 k3 @9 A# z! K; KAAI(See ARRIVAL AIRCRAFT INTERVAL.)
) m6 w A3 \, j2 M* P) n* I6 |5 nAAR(See AIRPORT ARRIVAL RATE.)2 l7 s, q% O4 p) E
ABBREVIATED IFR FLIGHT PLANS- An0 u( e s( i5 [4 g8 b
authorization by ATC requiring pilots to submit only
7 U* `3 j& X" B z' t5 ethat information needed for the purpose of ATC. It1 c7 I) J) |$ {5 A9 f, o
includes only a small portion of the usual IFR flight
% t, }' T) l5 k9 e5 pplan information. In certain instances, this may be
4 j( {/ z+ B+ [9 T! l% ponly aircraft identification, location, and pilot; I$ n; q" X2 H3 }* t0 }
request. Other information may be requested if0 [) v# O& [7 t
needed by ATC for separation/control purposes. It is; @4 F* ?6 Z: F
frequently used by aircraft which are airborne and8 s. ]1 v1 D+ d( S' ~# j
desire an instrument approach or by aircraft which are
( {7 n/ y9 B1 M/ [7 E/ x1 j$ Zon the ground and desire a climb to VFR‐on‐top.
" E( A/ e1 Z+ G$ d5 m(See VFR‐ON‐TOP.)
7 Y4 U; ~7 A' c; W" \(Refer to AIM.)9 E2 Y4 `8 m; c& N* B) @' c/ v# W
ABEAM- An aircraft is “abeam” a fix, point, or1 K1 W1 ^% @2 `
object when that fix, point, or object is approximately3 d j3 L. ]. ]; b4 ~ J1 X |+ z5 y9 ^
90 degrees to the right or left of the aircraft track.
/ k. R! g& \0 d4 v2 ~& ^* J3 F4 fAbeam indicates a general position rather than a, h5 [) O' v1 S- {5 z, w. _
precise point.# Z3 k7 x5 L4 k4 k$ y# N& f
ABORT- To term inate a preplanned aircraft
" C4 C; t, v. N3 T) B" L9 _- d2 Lmaneuver; e.g., an aborted takeoff.- n4 h0 q& C5 S4 z
ACC [ICAO]-
, B0 O1 H4 K" V/ c; I4 I0 y" A(See ICAO term AREA CONTROL CENTER.)
; l: V9 l% b) U9 l2 A( B$ b1 A$ {ACCELERATE‐STOP DISTANCE AVAILABLE-2 Y3 P% D& V. b) @
The runway plus stopway length declared available
/ J( s, |6 A+ P2 ]4 _2 ~, `! V! uand suitable for the acceleration and deceleration of. v- R6 j4 ^9 v, ?: p0 }' [
an airplane aborting a takeoff.4 g/ u( z9 a3 W x% @
ACCELERATE‐STOP DISTANCE AVAILABLE/ T* B4 ?7 m7 d! |" N
[ICAO]- The length of the take‐off run available plus" h9 {9 E9 U9 P( ]# @4 ]
the length of the stopway if provided.' u0 l8 J( s: k* ~1 B( ~) n
ACDO(See AIR CARRIER DISTRICT OFFICE.)! x3 f6 q: B- j9 n9 U7 M. g
ACKNOWLEDGE- Let me know that you have
( a: E& G: E5 Rreceived my message." U7 E5 M, G: x1 m8 O5 K1 z
(See ICAO term ACKNOWLEDGE.)& j, L6 w; c$ u5 P8 V% {7 G* o7 p
ACKNOWLEDGE [ICAO]- Let me know that you$ l% @2 l# V3 {3 ~" J7 i2 O9 @
have received and understood this message.8 c8 e' \4 w3 P; t# S
ACL(See AIRCRAFT LIST.)
/ F3 t8 j+ k5 Q" IACLS(See AUTOMATIC CARRIER LANDING
4 ]+ q( {& ?3 i3 `; M0 H; oSYSTEM.)' H6 A" n6 o! w
ACLT(See ACTUAL CALCULATED LANDING TIME.)3 y4 n+ C9 l* q
ACROBATIC FLIGHT- An intentional maneuver- w7 s% \! o3 B: L1 m3 Y8 m4 n
involving an abrupt change in an aircraft's attitude, an7 m8 i$ b/ E4 r5 A3 n/ [
abnormal attitude, or abnormal acceleration not
) W, U* l% L, l; b, a# Y- }necessary for normal flight.
/ r! M( X [" a9 Y" F9 u- `(See ICAO term ACROBATIC FLIGHT.)
& x2 c+ E; s0 _, O(Refer to 14 CFR Part 91.)
/ f( `3 o" Q3 w/ sACROBATIC FLIGHT [ICAO]- Maneuvers inten‐
/ W+ }/ l% k6 k9 P5 E1 Htionally performed by an aircraft involving an abrupt
2 [5 M- H" A# k, B, ^change in its attitude, an abnormal attitude, or an$ `3 j" b: r1 c5 O$ n- A: d* [
abnormal variation in speed.
4 k- c3 o* Y9 ?/ K1 MACTIVE RUNWAY(See RUNWAY IN USE/ACTIVE RUNWAY/DUTY4 ~* ]+ M, q' c2 Y2 ?* Y* a. g( E
RUNWAY.)
D4 D7 n: Z7 D. Q4 E6 fACTUAL CALCULATED LANDING TIME-* h, a0 f2 b' F+ q- u, ?! }
ACLT is a flight's frozen calculated landing time. An
# l2 z. A. p! k# V" Iactual time determined at freeze calculated landing5 }" g! b8 t, w4 `( {! l/ f9 w8 N
time (FCLT) or meter list display interval (MLDI) for
0 s' t8 E" q& ` Dthe adapted vertex for each arrival aircraft based upon7 `- K2 o# P+ L4 s
runway configuration, airport acceptance rate, airport3 u3 L" Q7 y+ I2 Q$ `1 y
arrival delay period, and other metered arrival, z5 o" a# M6 B
aircraft. This time is either the vertex time of arrival
( V2 ~. M$ q1 H3 T, ~1 d4 a(VTA) of the aircraft or the tentative calculated+ V m( R S% @" V, S, Z* w
landing time (TCLT)/ACLT of the previous aircraft# c9 S( i; E1 i0 ?: b7 E% r; O
plus the arrival aircraft interval (AAI), whichever is" d) @5 X( p' @" P: W1 |' |) F
later. This time will not be updated in response to the. O; t4 C, n/ ~/ J& i) {$ D$ U
aircraft's progress.( N! W6 }) u1 f* H' {% B1 O
ACTUAL NAVIGATION PERFORMANCE7 Q* n+ u' V6 \# S
(ANP)-$ R" L' k* ?+ O5 u$ t
(See REQUIRED NAVIGATION
* U( D* W5 ]2 @PERFORMANCE.)
, z3 U, `% ?+ t+ iADDITIONAL SERVICES- Advisory information8 P$ l7 M4 G5 t0 g
provided by ATC which includes but is not limited to
k! ? }" G E' T( j {6 cthe following: ?- W7 D1 u) Q1 W9 M* M% q4 Z
a. Traffic advisories.
4 d4 r: n0 P" K" B$ jb. Vectors, when requested by the pilot, to assist
' z3 a* k' D) ]9 @/ b7 gaircraft receiving traffic advisories to avoid observed
1 S z! L! z5 ^ U; A. mtraffic.
6 V G5 S3 R7 t% s' ^Pilot/Controller Glossary 2/14/085 Q" `# @: E9 D7 N
PCG A-2
& F* O2 M4 ?8 W1 f v; y; cc. Altitude deviation information of 300 feet or: `& I3 R/ Q) Y
more from an assigned altitude as observed on a
( q' w) B! T9 n9 L% R4 Cverified (reading correctly) automatic altitude2 Z3 M, }1 x% S O6 f
readout (Mode C).6 K4 v* y0 {8 U1 p7 p( T- Z/ b; D5 N6 a
d. Advisories that traffic is no longer a factor.) o6 N7 Y6 b h( k6 r( x
e. Weather and chaff information.
# f' n! X7 _& I6 i8 w! ~* c* Pf. Weather assistance.
9 d3 D- T, z( s7 h$ p4 }g. Bird activity information.$ l0 I2 G( e- r6 t6 Q7 _
h. Holding pattern surveillance. Additional ser‐
5 y1 W5 J+ g( Y+ fvices are provided to the extent possible contingent
) T; ?- V% u- H/ r5 uonly upon the controller's capability to fit them into2 o% s5 L- ^4 F F
the performance of higher priority duties and on the
, c$ X S, o9 Y' ^basis of limitations of the radar, volume of traffic,
' n/ Q+ v4 m! h0 qfrequency congestion, and controller workload. The
9 B: ]' C( F& L1 ^2 ucontroller has complete discretion for determining if" \3 f) B# [! M+ g! P7 y& Y
he/she is able to provide or continue to provide a8 L. X3 v* Z) K1 ~) g6 @1 ~. i
service in a particular case. The controller's reason
9 j0 x* E7 F" r- |& C& _7 knot to provide or continue to provide a service in a
4 D( [; v8 I! |; Fparticular case is not subject to question by the pilot
" N. O- A7 M- h8 h( wand need not be made known to him/her.
3 P5 Y+ O/ O8 s# U(See TRAFFIC ADVISORIES.)
2 }1 ^; x( k! k; v, z8 R(Refer to AIM.)
+ y4 Q$ G; S1 V0 ^+ o" m* J( |/ dADF(See AUTOMATIC DIRECTION FINDER.)
; L f0 ]$ M9 J1 t7 }! o) c/ c) LADIZ(See AIR DEFENSE IDENTIFICATION ZONE.)
+ v: _2 ]- U% \( v2 aADLY(See ARRIVAL DELAY.)0 @( n& t& y1 h/ k
ADMINISTRATOR- The Federal Aviation Admin‐) `6 j' h7 h: E. ^: K6 L
istrator or any person to whom he/she has delegated
$ t2 _1 Y% |6 F" H' xhis/her authority in the matter concerned.
- g! d: j8 x6 ?9 I9 B: E9 H; }ADR(See AIRPORT DEPARTURE RATE.)8 K k. e) M1 X
ADS [ICAO]-
3 x: }" [- L! H$ k% U, P* Y(See ICAO term AUTOMATIC DEPENDENT
9 t7 N! _6 a6 c. bSURVEILLANCE.)
) N, {7 q; N. K' BADS-B(See AUTOMATIC DEPENDENT2 K) _# V1 J- V/ u9 F; [. B
SURVEILLANCE-BROADCAST.). D! ]9 t5 v# c2 `8 U' G
ADS-C(See AUTOMATIC DEPENDENT
% x/ h2 e; \0 a1 h- J1 MSURVEILLANCE-CONTRACT.)
6 Y5 Z3 Q1 E7 ]& qADVISE INTENTIONS- Tell me what you plan to1 g7 i5 A4 F- G F* V! Q
do.
$ V: V) r% }0 d/ l! [0 e; o, XADVISORY- Advice and information provided to% P) O6 I+ x, d- w# p+ d* l
assist pilots in the safe conduct of flight and aircraft
; V* z7 S$ i& o# f' ^& Gmovement.
) |% X9 r& b' a% p$ T(See ADVISORY SERVICE.)* B& f, j8 c. G3 _7 c
ADVISORY FREQUENCY- The appropriate fre‐4 { h$ Y# T1 Z" k2 q4 H. W# ]
quency to be used for Airport Advisory Service.
: h# O- i6 y) O- A# g a(See LOCAL AIRPORT ADVISORY.)
7 T& }6 p: M& r! E+ T$ x1 C(See UNICOM.)
- |! Z% Z( M1 t7 S(Refer to ADVISORY CIRCULAR NO. 90‐42.)
- Z1 [& ?3 s6 U7 p(Refer to AIM.)& z7 E/ b9 P, j. f1 y6 N ?& ~
ADVISORY SERVICE- Advice and information" }$ j- d4 K0 ^. u! o0 H
provided by a facility to assist pilots in the safe
4 _" P" L( O3 d3 nconduct of flight and aircraft movement.
+ p" k: S* [% M7 L5 I' G(See ADDITIONAL SERVICES.)
/ w3 Y0 Q0 u. {) M(See EN ROUTE FLIGHT ADVISORY
, @8 U0 r) Z! M" Z! g, hSERVICE.); {6 O* z w3 o: ~1 m) A& c
(See LOCAL AIRPORT ADVISORY.)
0 S+ d8 b- u7 |$ R7 P+ b) u V' I(See RADAR ADVISORY.)
* j9 m, s; N: Y8 }8 |. t7 M(See SAFETY ALERT.) u- Z7 ~5 [3 {. p, s. {
(See TRAFFIC ADVISORIES.): p) q7 n: K3 f% ^) G
(Refer to AIM.)
$ z/ Z, H2 k0 d" ]; I6 L. eAERIAL REFUELING- A procedure used by the
! E0 K7 {. I6 i" R) ^1 ~# p% ~8 ymilitary to transfer fuel from one aircraft to another
% G/ J/ R& u* I+ e2 z0 q$ Vduring flight.) T, s: k3 Q; `/ h2 U2 ]3 V6 a
(Refer to VFR/IFR Wall Planning Charts.); n3 g" B. ?2 D
AERODROME- A defined area on land or water
2 o& B& e# z* R4 }* L(including any buildings, installations and equip‐9 M5 Y; p# }" L- s8 V# `" g5 R, ]$ F+ z
ment) intended to be used either wholly or in part for* a4 ]* X$ V$ ?8 D+ b3 k6 l
the arrival, departure, and movement of aircraft.6 H' l% u+ g1 p/ X% R5 v$ G* m, x
AERODROME BEACON [ICAO]- Aeronautical0 p/ i8 a4 ?3 w+ t8 e* `
beacon used to indicate the location of an aerodrome
1 |7 ~ }& B& K) c& o0 E3 Rfrom the air.6 {8 h/ I- G# [& _' E2 x
AERODROME CONTROL SERVICE [ICAO]- Air
. Z( Y8 r: r. x! v* Rtraffic control service for aerodrome traffic.
+ T, ?/ X4 C# q% c/ E6 fAERODROME CONTROL TOWER [ICAO]- A
$ ?! i1 P, Z7 u2 p( ~ Dunit established to provide air traffic control service, s, u2 R3 P+ t" c, Y3 t; D' ?! I
to aerodrome traffic.' E7 s' E% {1 n6 E
AERODROME ELEVATION [ICAO]- The eleva‐
# ]8 u# {: K. t: T9 C7 I% q6 f- Ztion of the highest point of the landing area.
0 U- `. [: M* k1 _! P: nAERODROME TRAFFIC CIRCUIT [ICAO]- The0 H; @! ~. {' E" H Z9 {- m
specified path to be flown by aircraft operating in the
$ o8 W h. j' B1 ]1 ~vicinity of an aerodrome.9 s0 q3 f3 K" ~
AERONAUTICAL BEACON- A visual NAVAID
) d" G4 U! `4 sdisplaying flashes of white and/or colored light to
1 m% G8 B& A2 v8 ^2 p8 A: Jindicate the location of an airport, a heliport, a
8 A$ @8 o( N) uPilot/Controller Glossary 2/14/085 [0 k. j5 `- ?9 l4 w
PCG A-3 C+ e3 l3 X$ b6 C' X
landmark, a certain point of a Federal airway in- P0 ]6 j7 z, [2 U! U0 O- Y
mountainous terrain, or an obstruction.
/ ~& \# V* i/ X5 w8 L* ](See AIRPORT ROTATING BEACON.)
) F- u$ z R& z1 m; k(Refer to AIM.)7 g. v) U# w. ] A! B
AERONAUTICAL CHART- A map used in air8 o+ a% I) S1 n( I5 }
navigation containing all or part of the following:* B1 X7 v- P6 O2 u: ^/ | [4 X
topographic features, hazards and obstructions,
) H" `) o" q4 ^" L: bnavigation aids, navigation routes, designated
3 h: P* F' Q+ U- B# x" h' B' Jairspace, and airports. Commonly used aeronautical
x" \& I* f' y7 F2 i* ~charts are:" e) ?0 `2 k4 ]9 C2 S" ]/ y2 t! e: ^) r
a. Sectional Aeronautical Charts (1:500,000)-! Z( r+ `9 f0 }9 E7 T2 X1 u
Designed for visual navigation of slow or medium
/ c9 F; u8 y/ vspeed aircraft. Topographic information on these
: `, P+ j2 ?6 L% n5 zcharts features the portrayal of relief and a judicious
% t/ G$ e/ i$ }selection of visual check points for VFR flight.' C6 y( f1 a& g3 Q+ z
Aeronautical information includes visual and radio
0 i. Q& v/ F3 A& V: I- d2 ^aids to navigation, airports, controlled airspace,
3 B- Q0 k6 n' G8 L6 Q1 s& R: ]restricted areas, obstructions, and related data.
6 S& t, p+ W/ Wb. VFR Terminal Area Charts (1:250,000)-
: u! p+ c8 c6 g" P' j" J6 e2 I- ?Depict Class B airspace which provides for the _# w! l( j: p+ k
control or segregation of all the aircraft within Class/ z i- \9 u' n# E( \
B airspace. The chart depicts topographic informa‐
' `9 S5 x% ~- r; s7 {5 k# _tion and aeronautical information which includes7 a4 o* O/ p2 _7 N; q7 P$ Y( z
visual and radio aids to navigation, airports,' B5 Y4 [* e0 u5 _' O' Y, O1 O; U' e
controlled airspace, restricted areas, obstructions,: d- |* T; N s
and related data.
# J9 J0 h$ l. U. ^1 D6 Z {) Lc. World Aeronautical Charts (WAC)
- y! b' n( v: w, H6 |1 ?, m(1:1,000,000)- Provide a standard series of aeronau‐4 t! U A0 p o
tical charts covering land areas of the world at a size! t' @1 L# N' f8 e7 i3 c* R
and scale convenient for navigation by moderate" L. S8 ~5 R! g4 k/ g& V
speed aircraft. Topographic information includes9 M8 N+ V, A5 Q0 @' @3 w) K+ l* j' D
cities and towns, principal roads, railroads, distinc‐
( r* j; }) I- r- t" V, u2 Itive landmarks, drainage, and relief. Aeronautical5 K C/ P( S: I/ r+ n9 ~
inform ation includes visual and radio aids to. K% A! G6 C* Q0 d# [
navigation, airports, airways, restricted areas,& Q+ B" ]! t s. e2 l. H
obstructions, and other pertinent data.
0 F# f% V/ N; M k* M$ Td. En Route Low Altitude Charts- Provide5 w! r: B1 L( Y( Z& F. c
aeronautical information for en route instrument
+ R) U, J: [3 m5 I6 q$ E* i3 znavigation (IF R) in the low altitude stratum.
! s+ y8 H4 ]- Z1 ~0 _Information includes the portrayal of airways, limits3 L& a0 [7 i3 j, {8 I
of controlled airspace, position identification and
9 u0 f- B! [+ W) C2 M$ rfrequencies of radio aids, selected airports, minimum
4 S6 h8 }+ t. H xen route and minimum obstruction clearance
$ Z8 m+ A: D: k Valtitudes, airway distances, reporting points, re‐ Z+ W6 A* k6 r' P ]
stricted areas, and related data. Area charts, which are
8 }, a" o: u' a7 z" a I% _# m" Aa part of this series, furnish terminal data at a larger
9 A) |- `* w4 L4 s" @2 oscale in congested areas.
1 `0 Q( r! d4 k' Ye. En Route High Altitude Charts- Provide
4 @7 K; X5 S/ X: xaeronautical information for en route instrument6 t- ^+ J: H; d& z2 B
navigation (IFR) in the high altitude stratum.- C. J3 e+ _# G7 B2 c9 p& }6 l
Information includes the portrayal of jet routes,
" J9 [+ s7 J5 n: T: t" I. g4 W7 gidentification and frequencies of radio aids, selected6 I$ O& l: l9 Y6 D' l0 W& @
airports, distances, time zones, special use airspace," Y, h0 A! n$ v6 e! i
and related information.7 Z5 O$ b' k' ?8 Y4 W1 Q
f. Instrument Approach Procedures (IAP) Charts-
' W5 w6 G' A6 M$ r8 X+ KPortray the aeronautical data which is required to- O! R# L: M) G* Z7 m
execute an instrument approach to an airport. These: u/ E5 B6 O) [! E7 z9 c
charts depict the procedures, including all related# s: O( ~2 k; H
data, and the airport diagram. Each procedure is) s4 ]( w* A# r
designated for use with a specific type of electronic
$ j" d5 p9 _/ B& Dnavigation system including NDB, TACAN, VOR,
8 h5 C, A- X' ~$ {1 yILS/MLS, and RNAV. These charts are identified by( R& Q& ~6 `/ Z3 t3 a7 i
the type of navigational aid(s) which provide final+ o9 Q5 R( [* G# G' t5 Y, D/ a6 C
approach guidance.
* d( ?1 _' |7 f5 B B6 {g. Instrument Departure Procedure (DP) Charts-
0 `& I7 ?& J8 _& p$ {( l5 cDesigned to expedite clearance delivery and to7 b, }( N2 ^% `, q
facilitate transition between takeoff and en route
j, S( t* t4 E. hoperations. Each DP is presented as a separate chart7 \6 s3 F3 W' }* U* P/ B
and may serve a single airport or more than one
6 ~) l& Q L/ O3 e/ b- lairport in a given geographical location.
7 V' L3 X9 c, K, d3 O* ch. Standard Terminal Arrival (STAR) Charts-
* t( S" |& z! x, B& g2 H$ o% TDesigned to expedite air traffic control arrival' ?5 [) T) |' d$ ]5 S7 L0 M) Y
procedures and to facilitate transition between en* a* X6 o; Q' b% S7 w! [6 I9 p
route and instrument approach operations. Each# @* A5 l! M7 K6 E
STAR procedure is presented as a separate chart and1 s) w7 P0 W; H
may serve a single airport or more than one airport in( ]1 s( P9 x |. y$ N' s
a given geographical location." \, w, v4 f. a! m
i. Airport Taxi Charts- Designed to expedite the
& @' f1 q1 K0 pefficient and safe flow of ground traffic at an airport.
* r" R, s8 ~1 x1 sThese charts are identified by the official airport( K# O, U; H: r5 |" E
name; e.g., Ronald Reagan Washington National
, e( p& O' R" e1 r7 yAirport.0 D, p" _2 ~: A" q& c, T) ~
(See ICAO term AERONAUTICAL CHART.) |
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