单项选择题
A.Commandant of the Coast Guard B.Owner of the unit C.Nearest Coast Guard Marine Safety Office D.Captain of the nearest port
A.the centerline of a navigable channel B.the starboard side of a channel C.a prominent object of navigational interest that has no lateral significance D.an area of a channel where passing another vessel is permitted
A.heavy rain within six hours B.a decrease in wind velocity C.a change in the present weather conditions D.that fog will soon set in