What is the basic concept of GMDSS、

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• 1The most common type of davit found on merchant vessels today is the ______．

  A.radial

  B.sheath-screw

  C.gravity

  D.quadrantal

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• 2The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found ______．

  A.on loran charts covering areas where sky waves are used

  B.in the Radio Aids to Navigation PUB 117

  C.in the Loran-C Correction Tables

  D.Sky waves cannot be matched to ground waves in Loran-C to produce a usable reading

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• 3Most LOG use the doppler shift of the carrier phase to compute ______．

  A.Latitude

  B.Longitude

  C.Speed

  D.Time

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• 4Indications of the master gyrocompass are sent to remote repeaters by the ______．

  A.follow-up system

  B.transmitter

  C.phantom element

  D.azimuth motor

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• 5There is a possibility that small vessel, ice and other floating objects may not be ______ by radar at an adequate range．

  A.reflect

  B.shown

  C.detected

  D.defected

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• 6Which would be the subject of a NAVAREA warning、

  A.A drifting buoy sighted in mid-ocean

  B.Extinguishment of Wolf Trap Light located inside Chesapeake Bay

  C.All military exercises on the high seas involving four or more vessels

  D.Off-air times of radio beacons when scheduled for routine maintenance

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• 7The present voyage of my ship began at the port of Shanghai after loading 8 000 tons of Cargo on board and ended after discharging the Cargo at the port of Hong Kong which was ______．

  A.the port of destination

  B.the port for bunkering

  C.the port of arrival

  D.the last port of call

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• 8If you receive the signal over radiotelephone of "Romeo Papa Tango" while using theInternational Code of Signals, you should ______．

  A.report to the caller

  B.repeat your last transmission

  C.continue since he received your last transmission

  D.end the transmission

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• 9You are using an automatic tension winch by yourself．If you get caught in the turns of the line as they lead into the gypsyhead ______．

  A.the safety cutout will stop the winch before you're injured

  B.the line will part and snap back

  C.you may be pulled into the winch and injured or killed

  D.None of the above are correct

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• 10The circular steel structure installed around the propeller of a towboat is the ______．

  A.nozzle

  B.shroud

  C.strut

  D.hood

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