TCH stands for?

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Study for the Pilot's Handbook of Aeronautical Knowledge Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

TCH stands for?

Explanation:
Threshold Crossing Height is the vertical distance above the runway threshold where the instrument approach path crosses the threshold plane. This fixed design value, published for each precision approach, tells you how high you will be as you pass over the threshold on the final approach. It helps define the published minima and confirms that the approach provides the required obstacle clearance at the threshold. It isn’t an elevation above mean sea level, so “Elevation” isn’t right, and it isn’t related to takeoff clearance or to the height at touchdown. In practice, TCH is commonly around 50 feet but varies with runway and approach design.

Threshold Crossing Height is the vertical distance above the runway threshold where the instrument approach path crosses the threshold plane. This fixed design value, published for each precision approach, tells you how high you will be as you pass over the threshold on the final approach. It helps define the published minima and confirms that the approach provides the required obstacle clearance at the threshold. It isn’t an elevation above mean sea level, so “Elevation” isn’t right, and it isn’t related to takeoff clearance or to the height at touchdown. In practice, TCH is commonly around 50 feet but varies with runway and approach design.

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