______ is the range over which the pilot of an aircraft on the centre line of a runway can expect to see the runway surface markings, or the lights delineating the runway or identifying its centre line .
A.RVR
B.AIS
C.VIS
D.DA
正确答案是A
______ is the range over which the pilot of an aircraft on the centre line of a runway can expect to see the runway surface markings, or the lights delineating the runway or identifying its centre line .
A.RVR
B.AIS
C.VIS
D.DA
正确答案是A