The loran lines drawn on navigation charts
题型:单项选择题
问题:
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
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