单项选择题
Rule 14 describes the action to be taken by vessel meeting head-on. Which of the following conditions must exist in order for this rule to apply?（）.
A.Both vessels must be power-driven B.They must be meeting on reciprocal or nearly reciprocal courses C.The situation must involve risk of collision D.All of the above
单项选择题 Sailing vessels are stand-on over power-driven vessels except（）.
单项选择题 Set of current is（）.
单项选择题 Several shoals（）reported to exist in the area south-west of the Brothers.
