单项选择题 I hereby（）that my vessel is fitted with a rudder angle indicator and an engine revolution indicator on the bridge in such a position that the pilot may read both without having to move away from his station; and that the rudder angle indicator and engine revolution indicator are in good working condition.

单项选择题 I have been（）that we are to shift from the wharf to buoys No.12 and No.13.

单项选择题 Defense plans may cause the operation of electronic aids to navigation to be suspended with （）.