单项选择题
In a traffic separation scheme, when joining a traffic lane from the side, a vessel shall do so（）.
A.only in case of an emergency or the engage in fishing within the zone B.as nearly as practical at right angles to the general direction of traffic flow C.at as small an angle as possible D.only to anchor within the zone
单项选择题 In a weather report, position good means that the position is（）.
单项选择题 In a weather report,Z stands for（）.
单项选择题 In admiralty sailing directions, bands is the word used to indicate（）marking.
