Loran-C is which type of navigation system ________．A.Hyperbolic，long-range navigation systemB.Short-range electronicC.Long-range，high frequency navigation systemD.Long-range，with a frequency of 1950 kHz
Loran-C is which type of navigation system ________．
A.Hyperbolic，long-range navigation system
B.Short-range electronic
C.Long-range，high frequency navigation system
D.Long-range，with a frequency of 1950 kHz
相关考题：
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！
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
Which type of ice is a hazard to navigation ________．A.Ice rindB.Pancake iceC.Frazil iceD.Growlers
Which spaces are required to be segregated from cargo tanks carrying grades A，B，C，or D cargoes ________．A.Pump roomsB.Enclosed deck spacesC.CofferdamsD.Navigation spaces
Loran-C is which type of system ________．A.Reflected electronB.Electrical radiationC.Quarterpoint electrical navigationD.Hyperbolic radio navigation
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！
全球卫星定位系统英文为：Navigation?Satellite?Time?And?Ranging／Global?Positioning?System，简称()。A.GPSB.DGPSC.NSTD.NSTAR
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