单项选择题
In determining a safe speed（）shall not be among those taken into account.
A.the presence of the background light at night B.the state of wind，sea and current C.the number of crew on board D.the draught in relation to the available depth of water
单项选择题 In determining a safe speed（）shall not be among those taken into account.
单项选择题 In determining if risk of collision exists，if there is any doubt，such risk shall be deemed to（）.
单项选择题 In determining safe speed，all of the following must be taken into account EXCEPT the（）.
