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What is the purpose of a Runway Threshold Bar?

A) Indicates the maximum length of runway that may be used for taxi after landing.
B) Indicates the beginning of a runway with a displaced threshold.
C) Indicates a runway that is approved for instrument approaches.

Answer :

Final answer:

The Runway Threshold Bar serves to indicate the beginning of a runway, particularly when there is a displaced threshold, and plays a key role in pilots' navigation during landings. It ensures that pilots are aware of the usable length of the runway while assisting in instrument approaches as well. This marking enhances safety and efficient runway usage.


Explanation:

Purpose of the Runway Threshold Bar

The Runway Threshold Bar is a critical component of airport runway markings that fulfills several important functions primarily related to safety during landings and takeoffs.

Functions of the Runway Threshold Bar

  • Visual Indicator: The threshold bar indicates the beginning of the runway, especially in cases of a displaced threshold. This means that while the bar signifies the start of the runway, the actual usable length may extend from that point.
  • Taxing Guidance: It helps pilots realize where they can safely land and taxi after landing, although it does not specifically indicate taxi limits.
  • Instrument Approaches: It marks runways suitable for instrument approaches, playing a crucial role during low-visibility conditions.

In summary, the threshold bar's primary role is to indicate the start of a runway segment and assist pilots in understanding the runway's available length and safety information.


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