The loran lines drawn on navigation charts represent().
A.Ground waves
B.Skywaves
C.Either ground waves or skywaves interchangeably
D.An average between ground wave and skywave positions
参考答案:A
The loran lines drawn on navigation charts represent().
A.Ground waves
B.Skywaves
C.Either ground waves or skywaves interchangeably
D.An average between ground wave and skywave positions
参考答案:A