The operation of which aids to navigation may be suspended during war or national emergency ________．A.Navigational satellitesB.LoranC.OmegaD.Any of the above
The operation of which aids to navigation may be suspended during war or national emergency ________．
A.Navigational satellites
B.Loran
C.Omega
D.Any of the above
相关考题：
In the following statements about graph operations，which one is NOT correct?A．Finding critical path is an operation on directed graphB．Finding critical path is an operation on undirected graphC．Spanning tree of a graph may not be uniqueD．Minimum spanning tree of a graph may not be unique
Navigation lights must be displayed in all weathers from sunset to sunrise. They also _____.A.must be displayed when day signals are being usedB.must be displayed when moored to a pierC.may be extingushed at night on open waters when no other vessels are in the areaD.may be displayed during daylight
During the PSC inspection, under the provision of SOLAS74, which one may not be regarded as clear grounds for ships' detainment?A.excess amount of oily-water mixtures in bilgesB.insulation of piping including exhaust pipes in engine room contaminated by oilC.improper operation of bilge pumping arrangementsD.paint peeling off the uptake
材料：Navigation in the canalIt is not recommended that any person shall be allowed on the bridge or in the pilot house except the pilot and other representative of the Canal，and Master and such officers and other members of the crew of the vessel as may be necessary for its navigation and control，management，operation and safety．Navigational aids are difficult to maintain and are reported to be unreliable in this waters．A considerable amount of shipping uses the canal and，in addition，many local fishing craft with nets may be encountered in the area.Since passage through the canal entails a run of more than 250 miles，long periods of considerable vigilance are necessary in order to maintain safe standards of navigation．问题：PILOT HOUSE is referred to ______ in this passage．A.the cabin in which the pilot staysB.the space in which the rudder is locatedC.the bridge of vesselsD.the cabin which is prepared for the pilotSHIPPING is referred to ______ in this passage．A.he operations of transportation of goods by seaB.the procedures of marine transportation businessC.the management of marine transportation businessD.the vessels and shipsThe author implies that ______ ．A.even by making use of modern instrument it is difficult to maintain safety in this areaB.mariners should take it easy when navigating in this areaC.modern instrument should be used to control the safety of navigation in this areaD.it is dangerous when navigating in this areaThe person on the bridge or in the pilot house shall be those ______ ．A.who are recommendedB.who are familiar with the navigation，management，operation and safety controlC.who are directly involved in the navigation，management，operation and safety controlD.who have nothing to do with the navigation，management，operation and safety control请帮忙给出每个问题的正确答案和分析，谢谢！
Defense plans may cause the operation of electronic aids to navigation to be suspended with ______.A.no noticeB.one day's noticeC.a week's noticeD.thirty (30) days notice
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 noticeB.It's useful in navigation and may be removed without noticeC.It's helpless in navigation and may be removed without noticeD.It's helpful in navigation and may be removed without notice
Under defense plans，operation of electronic aids may be temporarily suspended with ______．A.one day's noticeB.no noticeC.thirty（30）day's noticeD.a week's notice
By regulation，cargo tank atmosphere must be inert before and during which operation ________．A.StrippingB.LoadingC.CleaningD.All of the above
材料：It is not recommended that any person shall be allowed on the bridge or in the pilot house except the pilot and other representative of the canal，and master and such officers and other members of the crew of the vessel as may be necessary for its navigation and control，management，operation and safety．Navigational aids are difficult to maintain and are reported to be unreliable in this waters．A considerable amount of shipping uses the canal and，in addition，many local fishing craft with nets may be encountered in the area. Since passage through the canal entails a run of more than 250 miles，long periods of considerable vigilance are necessary in order to maintain safe standards of navigation．问题：PILOT HOUSE is referred to ________ in this passage．A.the cabin in which the pilot staysB.the space which the rudder is locatedC.the bridge of vesselsD.the cabin which is prepared for the pilotSHIPPING is referred ________ in this passage．A.the operations of transportation of GOODs by seaB.the procedures of marine transportation businessC.the management of marine transportation businessD.the vessels and shipsThe person on the bridge or in the pilot house shall be those ________．A.who are recommendedB.who are familiar with the navigation．management．Operation and safety controlC.who are directly involved in the navigation，management，operation and safety controlD.who have nothing to do with the navigation，management，operation and safety controlThe author implies that ________．A.even by making use of modern instrument it is difficult to maintain safety in this areaB.mariners should take it easy when navigating in this areaC.modern instrument should be used to control the safety of navigation in this areaD.it is dangerous when navigating in this area请帮忙给出每个问题的正确答案和分析，谢谢！
We may draw a conclusion that_______during a war.A.the Red Cross only protects the woundedB.the Red Cross only helps prisoners of warC.the Red Cross only helps citizensD.the Red Cross helps all the people in need no matter which side they are fighting for
单选题During the PSC inspection under the provision of SOLAS 74, which one may be regarded as clear grounds for ships’ detainment?（）Afailure of proper operation of propulsionBpaint peeling off the uptakeCno operation procedures for the oil separatorsDdamaged sanitary pump
单选题The prohibition against displaying lights which may be confused with required navigation lights applies（）.Afrom sunset to sunrise and during restricted visibilityBonly when other vessels are in the areaConly when operating in a traffic separation schemeDonly when under tow
单选题Mariners should ensure correct（）of aids to navigation during twilight periods when some lighted aids to navigation are lit while others are not.AidentificationBdistinctionCdiscriminationDclearly seeing
单选题Preferred channel marks are aids to navigation which all following marks other than（）．Achannel junctionsBbifurcationsCfishing trapsDwrecks or obstructions
单选题Defense plans may cause the operation of electronic aids to navigation to be suspended with （）.Ano noticeBone day's noticeCa week's noticeDthirty (30) days notice
单选题All of the following information concerning lighted aids to navigation may be read directly from the Light List EXCEPT the（）.AlocationBheight of light above waterCluminous rangeDlight characteristics
单选题The operation of which aids to navigation may be suspended during war or national emergency（）.ANavigational satellitesBLoranCOmegaDAny of the above
单选题During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）Afailure of the proper operation of emergency generatorBinsulation of piping including exhaust pipes in engine room contaminated by oilCimproper operation of bilge of bilge of bilge pumping arrangementsDdamaged sanitary pump
单选题What is TRUE about hoisting operations?（）APersonnel may work beneath suspended loads，as long as they are alert and wear hard hatsBIf a suspended load with no tag begins to spin，personnel should attempt to stop the spinning if the load is within reachCIf tag lines are used to control a suspended load，they should be secured to the deckDPersonnel not involved in the hoisting operation should be kept clear of the transfer area
单选题The temperature of the fuel oil received during bunkering operation is critical in determining the （）Aexpansion space to leave in a tankBflash point at which the fuel will burnCtemperature to which the fuel must be heatedDrate at which the fuel can be pumped during transfer operations
单选题By regulation，cargo tank atmosphere must be inert before and during which operation?（）AStrippingBLoadingCCleaningDAll of the above
单选题Before a Flashback Table operation, you execute the following command: ALTER TABLE employees ENABLE ROW MOVEMENT; Why would you need this to be executed?（）ABecause row IDs may change during the flashback operationBBecause the object number changes after the flashback operationCBecause the rows are retrieved from the recycle bin during the flashback operationDBecause the table is moved forward and back to a temporary during the flashback operation
单选题Which of the following parameters would you use to record the errors that might be generated during the import operation？（）ALOGBHELPCBUFFERDPARFILEEINCTYPE
单选题During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）Afailure of the proper operation of the main steering gearBfailure of the proper operation of electrical installationsCleakage of domestic water pumpDinsulation of exhaust pipes in engine room contaminated by oil
单选题During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）Aexcess amount of oily-water mixtures in bilgesBinsulation of piping including exhaust pipes in engine room contaminated by oilCimproper operation of bilge pumping arrangementsDthere were an actual emergency
单选题During the watch at sea, where situations occur in the machine apace which may affect the speed maneuverability, power supply or other essentials for the safe operation of the ship（）should be informed as soon as possible.Athe chief engineerBthe masterCthe bridgeDthe company superintendent
单选题Which of the following is NOT cited as an example of the resurgence of Welsh national identity?AWelsh has witnessed a revival as a national language.BPoverty-relief funds have come from the European Union.CA Welsh national airline is currently in operation.DThe national symbol has become a familiar sight.