单项选择题
A.generally steady bearing and decreasing range B.generally steady range and increasing bearing C.increasing range and bearing D.decreasing bearing only
On a gnomonic chart，a great circle track between Los An...
单项选择题On a gnomonic chart，a great circle track between Los Angeles and Brisbane will appear as a （）.
A.loxodromic curve B.curved line concave to the equator C.straight line D.spiral approaching the poles as a limit
Mariners proceeding across the main routes are recommen...
单项选择题Mariners proceeding across the main routes are recommended to do so at（）.
A.as wide an angle as practicable B.as wide an angle so practicable C.like wide an angle as practicable D.like wide as angle so practicable
Mariners proceeding across the main routes are（）to do s...
单项选择题Mariners proceeding across the main routes are（）to do so at as wide an angle as practicable.
A.recommended B.reported C.applied D.complied
