Most often the offset threshold is in place to give arriving aircraft clearance over an obstruction while still allowing departing aircraft the maximum amount of runway available. A displaced threshold may also be introduced if a beginning section of the runway is no longer able to sustain the continuous impact from landing aircraft. In such a case, aircraft are expected to land beyond the displaced threshold. Departing aircraft are permitted to use the displaced section of the runway for takeoffs or landing rollouts because those aircraft are not impacting the runway with the force of a landing aircraft.
Displaced thresholds have arrows as the center line of the runway. A thick white line with usually four arrows pointing in the direction of the runway denotes the end of the threshold and the beginning of the runway.
Thresholds are counted as part of the runway, and are included in the runway size. When viewing a runway's size with displaced thresholds, one must find out how long the displaced thresholds are in order to calculate the maximum take-off and landing distance.
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Last updated on Wednesday July 02, 2008 at 10:22:40 PDT (GMT -0700)
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Most often the offset threshold is in place to give arriving aircraft clearance over an obstruction while still allowing departing aircraft the maximum amount of runway available. A displaced threshold may also be introduced if a beginning section of the runway is no longer able to sustain the continuous impact from landing aircraft. In such a case, aircraft are expected to land beyond the displaced threshold. Departing aircraft are permitted to use the displaced section of the runway for takeoffs or landing rollouts because those aircraft are not impacting the runway with the force of a landing aircraft.
Displaced thresholds have arrows as the center line of the runway. A thick white line with usually four arrows pointing in the direction of the runway denotes the end of the threshold and the beginning of the runway.
Thresholds are counted as part of the runway, and are included in the runway size. When viewing a runway's size with displaced thresholds, one must find out how long the displaced thresholds are in order to calculate the maximum take-off and landing distance.
This article is licensed under the GNU Free Documentation License.
Last updated on Wednesday July 02, 2008 at 10:22:40 PDT (GMT -0700)
View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation
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