Currently, _______ is installed on large and medium-sized transport aircraft for pilots’ own navigation.
A.NDB
B.VOR, LORAN
C.INS
D.Doppler
正确答案是C
Currently, _______ is installed on large and medium-sized transport aircraft for pilots’ own navigation.
A.NDB
B.VOR, LORAN
C.INS
D.Doppler
正确答案是C