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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
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更多 “ The operation of which aids to navigation may be suspended during war or national emergency ________．A.Navigational satellitesB.LoranC.OmegaD.Any of the above ” 相关考题
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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
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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
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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
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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！
考题
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
考题
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 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
考题
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
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By regulation，cargo tank atmosphere must be inert before and during which operation ________．A.StrippingB.LoadingC.CleaningD.All of the above
考题
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！
考题
We may draw a conclusion that_______during a war.A.the Red Cross only protects the wounded
B.the Red Cross only helps prisoners of war
C.the Red Cross only helps citizens
D.the Red Cross helps all the people in need no matter which side they are fighting for
考题
单选题During the PSC inspection under the provision of SOLAS 74, which one may be regarded as clear grounds for ships’ detainment?（）A
failure of proper operation of propulsionB
paint peeling off the uptakeC
no operation procedures for the oil separatorsD
damaged sanitary pump
考题
单选题The prohibition against displaying lights which may be confused with required navigation lights applies（）.A
from sunset to sunrise and during restricted visibilityB
only when other vessels are in the areaC
only when operating in a traffic separation schemeD
only when under tow
考题
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.A
identificationB
distinctionC
discriminationD
clearly seeing
考题
单选题Preferred channel marks are aids to navigation which all following marks other than（）．A
channel junctionsB
bifurcationsC
fishing trapsD
wrecks or obstructions
考题
单选题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
考题
单选题All of the following information concerning lighted aids to navigation may be read directly from the Light List EXCEPT the（）.A
locationB
height of light above waterC
luminous rangeD
light characteristics
考题
单选题The operation of which aids to navigation may be suspended during war or national emergency（）.A
Navigational satellitesB
LoranC
OmegaD
Any of the above
考题
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?（）A
failure of the proper operation of emergency generatorB
insulation of piping including exhaust pipes in engine room contaminated by oilC
improper operation of bilge of bilge of bilge pumping arrangementsD
damaged sanitary pump
考题
单选题What is TRUE about hoisting operations?（）A
Personnel may work beneath suspended loads，as long as they are alert and wear hard hatsB
If a suspended load with no tag begins to spin，personnel should attempt to stop the spinning if the load is within reachC
If tag lines are used to control a suspended load，they should be secured to the deckD
Personnel not involved in the hoisting operation should be kept clear of the transfer area
考题
单选题The temperature of the fuel oil received during bunkering operation is critical in determining the （）A
expansion space to leave in a tankB
flash point at which the fuel will burnC
temperature to which the fuel must be heatedD
rate at which the fuel can be pumped during transfer operations
考题
单选题By regulation，cargo tank atmosphere must be inert before and during which operation?（）A
StrippingB
LoadingC
CleaningD
All of the above
考题
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?（）A
Because row IDs may change during the flashback operationB
Because the object number changes after the flashback operationC
Because the rows are retrieved from the recycle bin during the flashback operationD
Because the table is moved forward and back to a temporary during the flashback operation
考题
单选题Which of the following parameters would you use to record the errors that might be generated during the import operation？（）A
LOGB
HELPC
BUFFERD
PARFILEE
INCTYPE
考题
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?（）A
failure of the proper operation of the main steering gearB
failure of the proper operation of electrical installationsC
leakage of domestic water pumpD
insulation of exhaust pipes in engine room contaminated by oil
考题
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?（）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
there were an actual emergency
考题
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.A
the chief engineerB
the masterC
the bridgeD
the company superintendent
考题
单选题Which of the following is NOT cited as an example of the resurgence of Welsh national identity?A
Welsh has witnessed a revival as a national language.B
Poverty-relief funds have come from the European Union.C
A Welsh national airline is currently in operation.D
The national symbol has become a familiar sight.
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