What should be used to steer an open lifeboat if the rudder becomes lost or damaged?
〇A.Daggerboard
〇B.Sea anchor
〇C.Steering oar
〇D.Spare rudder
【单选】Beam width distortion can be reduced by ______.
〇A.adjustingcentre position
〇B.adjusting heading marker
〇C.adjusting brilliance
〇D.reducing gain
【单选】When lowering a personnel net to pick up personnel from a boat,the personnel basket should be ______.
〇A.dropped in the water
〇B.lowered over open water
〇C.tied to the rig with a tag line
〇D.tied to the vessel with a tag line
【单选】A look-out should report objects sighted using ______.
〇A.true bearings
〇B.magnetic bearings
〇C.relative bearings
〇D.gyro bearings
【单选】The Experimental Lighthouse-buoy has no navigational significance and may be removed at will．The above sentence means ______.
〇A.It's of no use for navigation and would be removed with notice
〇B.It's helpless in navigation and may be removed without notice
〇C.It's helpful in navigation and may be removed without notice
〇D.It's useful in navigation and may be removed without notice
【单选】In determining a safe speed ______ shall not be among those taken into account．
〇A.the maneuverability of the vessel
〇B.the traffic density
〇C.the power of the vessel
〇D.the state of visibility
【单选】According to SOLAS the breathing apparatus onboard shall have sufficient capacity for how many minutes of operation?
〇A.60
〇B.30
〇C.20
〇D.45
【单选】My gyro-compass ______ is two degrees east．
〇A.trouble
〇B.mistake
〇C.error
〇D.wrong
【单选】If you have to abandon ship，and enter a liferaft，your main course of action should be to ______.
〇A.head for the closest land
〇B.remain in the vicinity of the sinking vessel
〇C.head for the closest sea lanes
〇D.consult everyone's opinion
【单选】A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as ______.
〇A.sleet
〇B.hail
〇C.freezing rain
〇D.rime
【单选】What does the term TO NA VIGATE WITH CAUTION mean？
〇A.To navigate carefully
〇B.To navigate intensely
〇C.To navigate intentionally
〇D.To navigate completely
【单选】Damage to cargo caused by dust is known as ______.
〇A.vaporization
〇B.tainting
〇C.contamination
〇D.oxidation
【单选】Which of the following information is not contained in the Inmarsat-C MES distress alerting?
〇A.Distress nature
〇B.MES ID
〇C.LES ID
〇D.The subsequent distress traffic frequency
【单选】The lights prescribed by the Rules shall be exhibited ______.
〇A.whenever a look-out is posted
〇B.at all times
〇C.from sunrise to sunset in restricted visibility
