单项选择题
A.take action to cross ahead of the other vessel
B.take action to pass astern of the other vessel
C.maintain course and speed
D.change course and increase speed
单项选择题 In complying with the Rules，of what must the mariner take due regard?（）.
单项选择题 In dense fog a vessel without operational radar may not be justified（）at all but should anchor if it is safe and practicable for her to do so.
单项选择题 In determining a safe speed（）shall not be among those taken into account.