单项选择题
As look-out，you spot an object 45°off your port bow. You should report the object as（）.
A.broad on the port bow B.3 points on the port bow C.3 points forward of the port beam D.on the port beam
单项选择题 A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights（）.
单项选择题 A vessel engaged in trawling will show identification lights of（）.
单项选择题 A vessel engaged in mine clearance operations is called（）.
