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obstruction identification
surfaces (OIS)
safetyRegulation TextNameType Identifier for the safety
regulations in effect within
the zone
aircraftCategory AircraftCharacteristic(0..*) Classification of aircraft
based on 1.3 times stall
speed in landing
configuration at maximum
certified landing mass.
significantObstacle Obstruction(0..*) The obstacle that controls
the altitude definition of
the assessment area
would penetrate the 40:1
OCS
surface Surface(0..1) The geographical
representation of the
Assessment Area.
startingCurve Curve(0..1) The curve that starts the
ObstacleAssessmentArea
.
annotation Note(0..*)
Used by
HoldingAssessment
CirclingArea
ObstacleAssessmentArea ^
ApproachCondition
NavigationAreaRestriction
SegmentLeg
RouteSegment
See diagrams: 1 - Final Segment Leg Conditions
2 - Unplanned Holding
2 - Route Segment
1 - Circling
1 - Obstacle Assessment Feature
2 - Obstacle Assesment Associations
2 - RestrictedNavigationArea
ObstaclePlacement ^
<<object>> [Logical
View::AIXM::AIXM
Features::Shared::Surfac
e Assessment]
Definition
Provides the location relative to
Properties
obstacleBearing ValBearingType Used only for MSA/ESA. The
bearing from a given point to the
obstruction.
obstacleDistance ValDistanceType The distance from a given point
to the obstruction.
pointType TextNameType The type of point referenced
when determining the bearing
and distance to the obstruction.
Example MSA/ESA centre point,
DER
obstaclePlacement CodeSideType Indicates the obstacle position
relative to the centreline
annotation Note(0..*)
Used by
ObstaclePlacement ^
Obstruction
See diagrams: 1 - Obstacle Assessment Feature
Obstruction ^
<<object>> [Logical
View::AIXM::AIXM
Features::Shared::Surfac
e Assessment]
Definition
[FAA 8260.3] The highest airspace, obstacle or terrain relative to a prescribed plane
within a specified area. NOTE: In precision approach procedures where obstacles
penetrate the approach surface, the controlling obstacle is the one which results in
the requirement for the highest decision height (DH).
Properties
requiredClearance ValDistanceType Required altitude
adjustment above any
obstacle or terrain within
a defined safety buffer
region. The safety buffer
allows for errors in the air
and in the accuracy of
data such as obstacle
accuracy. This together
with other adjustments
(human factor
adjustments, lighting
adjustments, altimeter
adjustments, etc). give
the minimum altitude.
minimumAltitude ValDistanceVerticalType The value of the minimum
obstacle clearance
altitude.
surfacePenetration CodeYesNoType A code indicating whether
the controlling obstacle
penetrates the
assessment surfaces.
Rule: if
surfacePenetration is
"NO", then
slopePenetration will not
Obstruction ^
have a value.
slopePenetration ValAngleType A value calculated by
dividing 102.0 (a
constant) with the angle
of the glidepath
controlling CodeYesNoType Indication whether it is a
"controlling obstruction"
for the associated
ObstacleAssessmentArea
.
closeIn CodeYesNoType "Close-In Obstacles" are
those that would
penetrate the 40:1 OCS
and would require a climb
gradient to 200 feet or
less above the departure
end of runway. So if an
aircraft climbs at the
minimum standard 200
feet per NM, "Close-In
Obstacles" are those
within 1 NM from the end
of the runway.
verticalStructureObstruction VerticalStructure(0..1) Vertical assessment
controlling obstacle.
adjustment AltitudeAdjustment(0..*) Operational factors
applied to obstacle
clearance altitudes to
produce the safest usable
altitude.
obstaclePlacement ObstaclePlacement(0..*) location of obstacle in
relation to a given point.
annotation Note(0..*)
Used by
ObstacleAssessmentArea
TerminalArrivalAreaSector
NavigationAreaSector
SafeAltitudeAreaSector
Obstruction ^
See diagrams: 2 - NavigationArea
1 - Terminal Arrival Area
1 - Minimum and Emergency Safe Altitude
1 - Obstacle Assessment Feature
Oil ^
<<object>> [Logical
View::AIXM::AIXM
Features::Service]
Definition
Oil types used for aircraft/helicopters.
Properties
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