Definition of “HAA”
HAA, also known as Height Above Airport, is a term used in aviation to indicate the altitude of an aircraft above the highest point within a specific airport’s immediate vicinity. This information is crucial for pilots, as it helps them maintain a safe altitude during takeoff, landing, and flight within the airport’s airspace constraints.
The HAA value is usually expressed in feet above mean sea level (MSL) and is determined by subtracting the airport elevation from the aircraft’s altitude. This value accounts for the obstacle clearance necessary for departure, approach, and transition within the airport’s protected airspace.
The HAA is not constant throughout the airport but varies depending on the position and the route flown by the aircraft. Pilots must be aware of HAA values to avoid hitting obstacles and maintain a safe altitude during every flight phase.
In summary, HAA is an essential concept for safe aviation operations within airports. Understanding and utilizing the HAA values ensure the pilot’s situational awareness and safety during every flight operation.
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