单项选择题 At an unsheltered anchorage the chief engineer officer shall consult with （） whether or not to maintain an underway watch.

单项选择题 The Oil Record Book, as a part of the ships official logbook, shall be kept on board and preserved for a period of （）.

单项选择题 Enhanced procedures concerning the exercise of （） have been developed to allow intervention in the ease of deficiencies deemed to pose a danger to persons, property or the environment.