单项选择题 A vessel using a traffic separation scheme shall so far as practicable（）a traffic separation line or separation zone.

单项选择题 A vessel when joining or leaving from the side of a traffic separation scheme shall do so at as（）to the general direction of traffic flow as practicable.

单项选择题 If obliged to cross traffic lanes，a vessel shall do so on a heading as nearly as practicable （）to the general direction of traffic flow.