Obstacle Clearance Heights
Obstacle Clearance Heights (OCH) refer to the minimum height above the highest obstacle in the vicinity of an airport or on a flight path that an aircraft must maintain in order to ensure a safe clearance. OCH is a critical factor in aviation safety as it helps to prevent collisions between aircraft and obstacles such as buildings, towers, mountains, and trees. OCH is determined by taking into account various factors such as the type of aircraft, its weight, speed, and climb rate, as well as the terrain and obstacles in the surrounding area. Pilots must be aware of the OCH for their aircraft and flight path and ensure that they maintain the required clearance at all times.
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