AOPA Pilot Magazine - May 2017 - 91
as accurate as those used by approach control, so arriving aircraft often must be held
at higher altitudes for longer distances. This
is especially true in mountainous areas,
where airplanes transitioning to approach
fixes may have to descend rapidly-or in a
holding pattern-to reach the altitudes used
along final approach courses.
Another scenario involving a lack of
MVAs exists where any nearby approach
control radars don't have adequate coverage.
Here, reports over common traffic advisory
frequencies (CTAFs) may be the only ways
to receive traffic advisories, and pilots must
MVAs take into
account individual
areas of high terrain
and obstacles, and
let controllers vector
traffic more precisely
around a terminal
area's airspace.
provide their own vertical separation from
terrain and obstacles by adhering strictly to
any published minimum altitudes.
So if MVAs let you fly lower than
MEAs or MOCAs, is there any other way
or place to safely fly at even lower altitudes? For aircraft departing some major
airports with approach control radar services, the answer is yes. Diverse vector
areas (DVAs) at busy airports are used to
vector aircraft taking off as they leave the
departure end of a runway. DVAs let controllers vector you at altitudes lower than
MVAs, while still providing vertical clearance from obstacles. However, the FAA's
Instrument Procedures Handbook points
out what could be a source of confusion. As
with MVAs, ATC knows areas and extents
of DVA coverage-but pilots don't. A pilot
using a charted, textual obstacle departure
procedure (ODP) for climbout may receive
a DVA altitude clearance that's lower than
the one on the ODP chart. What to do in
this case? Follow the ATC clearance, as it
takes precedence.
AOPA
EMAIL tom.horne@aopa.org
www.aopa.org/pilot AOPA PILOT | 91
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Table of Contents for the Digital Edition of AOPA Pilot Magazine - May 2017
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https://www.nxtbook.com/nxtbooks/aopa/pilot_202303
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https://www.nxtbook.com/nxtbooks/aopa/pilot_202301
https://www.nxtbook.com/nxtbooks/aopa/pilot_202212
https://www.nxtbook.com/nxtbooks/aopa/pilot_202211
https://www.nxtbook.com/nxtbooks/aopa/pilot_202210
https://www.nxtbook.com/nxtbooks/aopa/pilot_202209
https://www.nxtbook.com/nxtbooks/aopa/pilot_202208
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https://www.nxtbook.com/nxtbooks/aopa/pilot_202206
https://www.nxtbook.com/nxtbooks/aopa/pilot_202205
https://www.nxtbook.com/nxtbooks/aopa/pilot_202204
https://www.nxtbook.com/nxtbooks/aopa/pilot_202203
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https://www.nxtbook.com/nxtbooks/aopa/pilot_202201
https://www.nxtbook.com/nxtbooks/aopa/pilot_202112
https://www.nxtbook.com/nxtbooks/aopa/pilot_202111
https://www.nxtbook.com/nxtbooks/aopa/pilot_202110
https://www.nxtbook.com/nxtbooks/aopa/pilot_202109
https://www.nxtbook.com/nxtbooks/aopa/pilot_202108
https://www.nxtbook.com/nxtbooks/aopa/pilot_202107
https://www.nxtbook.com/nxtbooks/aopa/pilot_202106
https://www.nxtbook.com/nxtbooks/aopa/pilot_202105
https://www.nxtbook.com/nxtbooks/aopa/pilot_202104
https://www.nxtbook.com/nxtbooks/aopa/pilot_202103
https://www.nxtbook.com/nxtbooks/aopa/pilot_202102
https://www.nxtbook.com/nxtbooks/aopa/pilot_202101
https://www.nxtbook.com/nxtbooks/aopa/pilot_202012
https://www.nxtbook.com/nxtbooks/aopa/pilot_202011
https://www.nxtbook.com/nxtbooks/aopa/pilot_202010
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https://www.nxtbook.com/nxtbooks/aopa/pilot_202008
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https://www.nxtbook.com/nxtbooks/aopa/pilot_202006
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https://www.nxtbook.com/nxtbooks/aopa/pilot_202004
https://www.nxtbook.com/nxtbooks/aopa/pilot_202003
https://www.nxtbook.com/nxtbooks/aopa/pilot_202002
https://www.nxtbook.com/nxtbooks/aopa/pilot_202001
https://www.nxtbook.com/nxtbooks/aopa/pilot_201912
https://www.nxtbook.com/nxtbooks/aopa/pilot_201911
https://www.nxtbook.com/nxtbooks/aopa/pilot_201910
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https://www.nxtbook.com/nxtbooks/aopa/pilot_201905
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https://www.nxtbook.com/nxtbooks/aopa/pilot_201901
https://www.nxtbook.com/nxtbooks/aopa/pilot_201812
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https://www.nxtbook.com/nxtbooks/aopa/pilot_201704
https://www.nxtbook.com/nxtbooks/aopa/pilot_201703
https://www.nxtbook.com/nxtbooks/aopa/pilot_201702
https://www.nxtbook.com/nxtbooks/aopa/pilot_201701
https://www.nxtbook.com/nxtbooks/aopa/pilot_201612
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https://www.nxtbook.com/nxtbooks/aopa/pilot_201607
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https://www.nxtbook.com/nxtbooks/aopa/pilot_201604
https://www.nxtbook.com/nxtbooks/aopa/pilot_201603
https://www.nxtbook.com/nxtbooks/aopa/pilot_201602
https://www.nxtbook.com/nxtbooks/aopa/pilot_201601
https://www.nxtbook.com/nxtbooks/aopa/pilot_201512
https://www.nxtbook.com/nxtbooks/aopa/pilot_201511
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https://www.nxtbook.com/nxtbooks/aopa/pilot_201509
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https://www.nxtbook.com/nxtbooks/aopa/pilot_201107
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https://www.nxtbook.com/nxtbooks/aopa/pilot_201104
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