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<<feature>> [Logical View::AIXM::AIXM
Features::Shared::Surface
Assessment]
Definition
The geometry of surfaces that define altitude levels and the structure of an area used
to evaluate obstacles for determining holding patterns.
Properties
upperLimit ValDistanceVerticalType Max altitude allowed for
all aircraft categories at all
defined speeds
upperLimitReference CodeVerticalReferenceType A code indicating the
reference for a vertical
distance. Two series of
values exist: 1) real
distance: from GND, from
the MSL, from the WGS-
84 ellipsoid 2) pressure
distance.
lowerLimit ValDistanceVerticalType Minimum altitude allowed
for all aircraft categories
at all defined speeds
lowerLimitReference CodeVerticalReferenceType A code indicating the
reference for a vertical
distance. Two series of
values exist: 1) real
distance: from GND, from
the MSL, from the WGS-
84 ellipsoid 2) pressure
distance.
speedLimit ValSpeedType Restricted speed for
containment in a smaller
pattern
patternTemplate TextNameType Number of the holding
template
turbulentAir CodeYesNoType Evaluation is for
turbulentAir
legLengthToward ValDistanceType Leg length for when
holding is toward the
navaid
HoldingAssessment ^
legLengthAway ValDistanceType Leg length for when
holding is away the navaid
holdingPoint SegmentPoint(0..1) Point used to evaluate
safe holding.
unplannedHolding UnplannedHolding(0..1) Holding approved for all
significant radials of a
navaid or fix.
assessedHoldingPattern HoldingPattern(0..1) The HoldingPattern
assessed by the
HoldingAssessment.
obstacleAssessment ObstacleAssessmentArea(0..*) ObstacleAssessmentArea
used in a
HoldingAssessment.
annotation Note(0..*)
Used by
See diagrams: 2 - Unplanned Holding
2 - Obstacle Assesment Associations
HoldingPattern ^
<<feature>> [Logical View::AIXM::AIXM
Features::Holding]
Definition
A predetermined manoeuvre which keeps an aircraft within a specified airspace
while awaiting further clearance.
Properties
type CodeHoldingUsageType A code indicating the type of
holding procedure. E.g. enroute
holding, terminal area
holding.
outboundCourse ValBearingType The radial, course, bearing
or magnetic directional
course (if navaid is a
localizer) from the facility or
waypoint on which holding
is based.
HoldingPattern ^
outboundCourseType CodeCourseType The type of course to be
observed. E.g. true track,
magnetic track, heading,
VOR radial, true bearing,
magnetic bearing
inboundCourse ValBearingType The course of the inbound
leg.
turnDirection CodeDirectionTurnType Direction of the turn
upperLimit ValDistanceVerticalType Max altitude allowed for all
aircraft categories at all
defined speeds
upperLimitReference CodeVerticalReferenceType A code indicating the
reference for a vertical
distance. Two series of
values exist: 1) real
distance: from GND, from
the MSL, from the WGS-84
ellipsoid 2) pressure
distance.
lowerLimit ValDistanceVerticalType Minimum altitude allowed
for all aircraft categories at
all defined speeds
lowerLimitReference CodeVerticalReferenceType A code indicating the
reference for a vertical
distance. Two series of
values exist: 1) real
distance: from GND, from
the MSL, from the WGS-84
ellipsoid 2) pressure
distance.
speedLimit ValSpeedType Restricted speed for
containment in a smaller
pattern
instruction TextInstructionType Operational instructions that
must be observed when
flying the HoldingPattern.
nonStandardHolding CodeYesNoType ndicates whether the
HoldingPattern is nonstandard,
for example
because it uses left-hand
turns.
HoldingPattern ^
outboundLegSpan HoldingPatternLength(0..1) Outbound leg ends at a
choice of a time, a length or
a defined end point.
holdingPoint SegmentPoint(0..1) The point used to define the
holding pattern.
extent Curve(0..1) The geographical curve
depicted as a race track
pattern
annotation Note(0..*)
Used by
HoldingAssessment
InformationService
AirTrafficControlService
SegmentLeg
See diagrams: 4 - Information Services
5 - Air Traffic Control Services
1 - Holding Pattern
2 - Unplanned Holding
3 - Segment Leg
HoldingPatternDistance ^
<<object>> [Logical
View::AIXM::AIXM
Features::Holding]
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