Obstruction


             Obstruction

[FAA 8260.3] The highest airspace, obstacle or terrain relative to a prescribed plane within a specified area.</para><para> 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	Definition	Type
adjustment	Operational factors applied to obstacle clearance altitudes to produce the safest usable altitude.	-
annotation		-
closeIn	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.	(string) CodeYesNoType
controlling	Indication whether it is a "controlling obstruction" for the associated ObstacleAssessmentArea.	(string) CodeYesNoType
minimumAltitude	The value of the minimum obstacle clearance altitude.	(string) ValDistanceVerticalType
obstaclePlacement	location of obstacle in relation to a given point.	-
requiredClearance	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.	(decimal) ValDistanceType
slopePenetration	A value calculated by dividing 102.0 (a constant) with the angle of the glidepath	(decimal) ValAngleType
surfacePenetration	A code indicating whether the controlling obstacle penetrates the assessment surfaces. Rule: if surfacePenetration is "NO", then slopePenetration will not have a value.	(string) CodeYesNoType
theVerticalStructure	Vertical assessment controlling obstacle.	-

Details

Obstruction


              Obstruction

Semantic Correspondence

AIRM Concept	Definition
Obstruction	The highest airspace, obstacle or terrain relative to a prescribed plane within a specified area.

adjustment


              Obstruction.adjustment

Operational factors applied to obstacle clearance altitudes to produce the safest usable altitude.

Semantic Correspondence

AIRM Concept	Definition
Obstruction.adjustment	Operational factors applied to obstacle clearance altitudes to produce the safest usable altitude.

annotation


              Obstruction.annotation

Semantic Correspondence

AIRM Concept	Definition
Entity.annotation	A general text note for the entity or for one of its properties.

closeIn


              Obstruction.closeIn

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.

Semantic Correspondence

AIRM Concept	Definition
Obstruction.isCloseIn	Indication whether the obstruction penetrates the 40:1 OCS, therefore requiring a climb gradient to 200 feet or less above the departure end of runway.

controlling


              Obstruction.controlling

Indication whether it is a "controlling obstruction" for the associated ObstacleAssessmentArea.

Semantic Correspondence

AIRM Concept	Definition
Obstruction.isControlling	Indication whether it is a controlling obstruction for the associated obstacle assessment area.

minimumAltitude


              Obstruction.minimumAltitude

The value of the minimum obstacle clearance altitude.

Semantic Correspondence

AIRM Concept	Definition
Obstruction.minimumAltitude	The value of the minimum obstacle clearance altitude.

obstaclePlacement


              Obstruction.obstaclePlacement

location of obstacle in relation to a given point.

Semantic Correspondence

AIRM Concept	Definition
Obstruction.obstaclePlacement	Location of obstacle in relation to a given point.

requiredClearance


              Obstruction.requiredClearance

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.

Semantic Correspondence

AIRM Concept	Definition
Obstruction.requiredClearance	Required altitude adjustment above any obstacle or terrain within a defined safety buffer region.

slopePenetration


              Obstruction.slopePenetration

A value calculated by dividing 102.0 (a constant) with the angle of the glidepath

Semantic Correspondence

AIRM Concept	Definition
Obstruction.slopePenetration	A value calculated by dividing 102.0 (a constant) with the angle of the glidepath.

surfacePenetration


              Obstruction.surfacePenetration

A code indicating whether the controlling obstacle penetrates the assessment surfaces. Rule: if surfacePenetration is "NO", then slopePenetration will not have a value.

Semantic Correspondence

AIRM Concept	Definition
Obstruction.isAssessmentSurfacePenetrated	A code indicating whether the controlling obstacle penetrates the assessment surfaces.

theVerticalStructure


              Obstruction.theVerticalStructure

Vertical assessment controlling obstacle.

Semantic Correspondence

AIRM Concept	Definition
Obstruction.verticalStructureObstruction	Vertical assessment controlling obstacle.