The survey will in no way（）cargo operation，but the main engine will require four-hour notice to be ready if necessary after completion of the survey.

单项选择题The Master of a vessel may tender a Notice of Readiness to the charterer when the vessel （）.

A.has completed the terms of the charter party
B.is in all respects ready to load
C.is in all respects ready to sail
D.is safely moored or at a suitable anchorage

单项选择题The Local Notice to Mariners is usually published（）.

A.daily
B.weekly
C.monthly
D.semiannually

单项选择题The issue of Notices to Mariners of charts and these aids(Radar beacons)may be delayed until such time as they are assessed to be（）.

A.temporary
B.permanent
C.occasional
D.steady

单项选择题The external flotation bladder on an immersion suit should be inflated（）.

A.before you enter the water
B.after you enter the water
C.after one hour in the water
D.after you notice that your suit is losing buoyancy

单项选择题The Experimental Lighthouse-buoy has no navigational significance and may be removed at will.The above sentence means（）.

A.It's of no use for navigation and would be removed with notice
B.It's useful in navigation and may be removed without notice
C.It's helpless in navigation and may be removed without notice
D.It's helpful in navigation and may be removed without notice