单项选择题
A.the prevention of collision
B.the promotion of the traffic flow
C.the complying of port regulation
D.the development of navigational technique
单项选择题 Traffic separation schemes may be（）by the Organization for the purpose of these Rules.
单项选择题 Vessel shall normally join or leave a traffic lane（）of the lane.
单项选择题 You are advised to enter the traffic route at about 1730 hours，because a vessel is scheduled to enter at the time when you intended to enter.What can you understand from this seaspeak?（）.