In particular , if an aircraft flies from a low - speed air stream to a high - speed air stream , it may experience a large headwind gain leading to a lift of the aircraft 特别要注意的是，当飞机由低速气流进入高速气流时，逆风会大为增强，增加对飞机的浮力。
A change of 15 knots or more in headwind or tailwind is considered significant windshear which may require timely and appropriate corrective action by the pilot 引致逆风或顺风出现１ ５海里或以上的转变为显著的风切变，机师或须作出及时和适当的修正行动。
In particular , if an aircraft flies from a low - speed air stream to a high - speed air stream , it may experience a large headwind gain leading to a lift of the aircraft 特别要注意的是，当飞机由低速气流进入高速气流时，逆风会大为增强，增加对飞机的浮力。
However , if within the sea breeze the tailwind is increasing ( from point a to point b ) instead of decreasing then it translates into a headwind loss for the aircraft 然而，若果在海风当中是顺风增加由a点至b点而非减少时，则飞机亦等同遇到逆风减少。
Aircraft traversing through alternating high - speed and low - speed air streams may encounter headwind losses and gains at different locations along the approach and departure corridors 当飞机沿著进场或离场走廊穿越这些高低速交替的气流时，可能会在不同位置遇到逆风减少和增加的情况。
