现在乘飞机旅行的人越来越多,相应地飞行安全也越来越受到人们的重视。为了保证飞行安全,飞机上早就用上了近地警告系统,以提醒飞行员,防止飞机触地或与地面的高山相撞。但是,由于飞机坠地事故仍然是危及飞行安全的首要因素,所以,人们又改进发展了增强型近地警告系统。 Now more and more people travel by plane, corresponding flight safety is also more and more people’s attention. In order to ensure flight safety, the aircraft has long been used on the ground warning system to remind pilots to prevent the plane touch or collide with the mountains on the ground. However, since the accident of falling plane was still the primary factor endangering flight safety, people have also improved the development of an enhanced near ground warning system.