Collision hazards.

Bottom line

Each movement should not exceed 10°, and each should be observed for at least 1 second to enable detection. Even if entitled to the right-ofway, a pilot should yield if another aircraft seems too close. Before takeoff—prior to taxiing onto a runway or landing area in preparation for takeoff, pilots should scan the approach area for possible landing traffic, executing appropriate maneuvers to provide a clear view of the approach areas.