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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
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更多 “ 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 ” 相关考题
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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！
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A. GPS B. DGPS
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单选题Loran-C is which type of system（）.A
Reflected electronB
Electrical radiationC
Quarterpoint electrical navigationD
Hyperbolic radio navigation
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单选题In particular,which is not included in the Navigation System?（）A
ECDISB
RADARC
GPSD
GMDSS
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单选题Safety of navigation is dealt with in chapter V of the SOLAS Convention which identifiescertain navigation safety services which should be provided by Contracting Governments and sets forth provisions of an operational nature applicable in general to all ships on all voyages. This is（）the Convention as a whole.A
in contrast toB
in compliance withC
the essence ofD
representing
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单选题No damage of any kind（）aids to navigation or navigation facilities.A
should be done toB
should not be done toC
must be done withD
must not be done with
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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
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单选题Public address system: loudspeakers in the vessel’s cabins, mess rooms, ETC., and on deck via which important information can bebroadcast from a central point, mostly from the navigation bridge defines（）.A
PP-systemB
PA-systemC
AP-systemD
AA-system
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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
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单选题Class I and II private aids to navigation in or along navigable waters of the United States are listed in the（）.A
Sailing DirectionsB
Light ListC
List of Private AidsD
Aids to Navigation Manual
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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
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单选题You need to display a very large single-record data block. Since it will be so large, a convenient means of navigation is needed between items. Which type of canvas would you use to display the data block? （）A
Tab canvas. B
Pop up canvas. C
Spread table canvas. D
Vertical toolbar canvas.
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单选题The Consol navigation system，used in Russian and Northern European waters，can be used（）.A
for precise navigation in coastal watersB
by measuring the phase difference of the dots and dashesC
as an aid to ocean navigationD
if the vessel is fitted with a special Consol receiver
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单选题Who will be the first users of Galileo, the new satellite navigation system? A
Rescue workersB
GPS usersC
European drivers
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单选题Most Navigation System equipment is（）from the bridge, a unique location that allows for a centralized,safe and efficient management of ship navigation.A
accessibleB
restrictedC
deterredD
far away
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单选题Which statement about satellite navigation is TRUE? （）A
While a fix can be generated by signals received from two satellites，three satellites are necessary for reliable accuracyB
The satellites are in equatorial orbits around the earth about 60°of longitude apartC
The satellite navigation system determines a fix by measuring the doppler shift of the radio signals from the satelliteD
The ship's receiver cannot begin processing data until the antenna locks onto the satellite and starts continuous tracking
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单选题IBS必须包含（）A
航行管理系统（Navigation management system）B
控制显示系统（Conning Display）C
报警系统（Alarm System）D
A+B+C
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单选题The International Association of Lighthouse authorities (IALA) buoyage system “A” uses some types of marks to distinguish safe navigation? Which type(s) does(do) not belong to the system?（）A
lateral marks and cardinal marksB
safe water marksC
isolated danger marks and special marksD
dangerous water marks
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单选题The 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 usedB
in the Radio Aids to Navigation，PUB 117C
in the Loran-C Correction TablesD
Sky waves cannot be matched to ground waves in LORAN-C to produce a usable reading
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