The loran lines drawn on navigation charts represent ______．A.Ground wavesB.SkywavesC.Either ground waves or skywaves interchangeablyD.An average between ground wave and skywave positions
The loran lines drawn on navigation charts represent ______．
A.Ground waves
B.Skywaves
C.Either ground waves or skywaves interchangeably
D.An average between ground wave and skywave positions
相关考题：
We are given the orders that the project()before the end of next month. A、has to be drawn upB、be drawn upC、shall be drawn up will be drawn up
No navigational aids are shown and chart is not kept corrected for alterations in depths inside the pecked lines．For more detailed information，the larger scale charts must be______．A.boughtB.analyzedC.consultedD.Published
The correction to be applied to a LoranC 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 LoranC Correction TablesD.Sky waves cannot be matched to ground waves in LoranC to produce a usable reading
THE SPEED OF A VESSEL ADJUSTED TO THAT OF A PILOT BOAT AT WHICH THE PILOT CAN SAFELY EMBARK is ______.A.Ground speedB.Boarding speedC.Relative speedD.Speed of the vessel
All straight lines represent great circle tracks on a chart based on a(n) ______.A.Mercator projectionB.polyconic projectionC.orthographic projectionD.gnomonic projection
Generally，______ are used as the track charts on the high sea，______ are used for harbors，inland waters and coastal areas．A.Mercator charts／Loran chartsB.Admiralty charts／Routeing chartsC.large scale charts／small scale chartsD.small scale charts／large scale charts
The charts show two dashed lines crossing the river justsouth of St. Catherine Bar Light. What does this indicate?A.Overhead power linesB.Louisiana-Mississippi ferry crossingsC.Two railroad trestlesD.Two submerged oil pipelines
No navigational aids are shown and the chart is not kept corrected for alterations in depths inside the pecked lines． For more detailed information，the larger scale charts must be ______.A.referred toB.appreciatedC.met withD.concerned
Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals ________．A.Approach chartsB.General chartsC.Sailing chartsD.Coast charts
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 system ________．A.Reflected electronB.Electrical radiationC.Quarterpoint electrical navigationD.Hyperbolic radio navigation
Lines drawn through points on the Earth having the same atmospheric pressure are known as ___________.A.isothermalB.millibarsC.isobarsD.Seismics
单选题Loran-C is which type of system（）.AReflected electronBElectrical radiationCQuarterpoint electrical navigationDHyperbolic radio navigation
单选题No navigational aids are shown and the chart is not kept corrected for alterations in depths inside the pecked lines. For more detailed information, the larger scale charts must be（）.Areferred toBappreciatedCmet withDconcerned
单选题The loran lines drawn on navigation charts represent（）.AGround wavesBSkywavesCEither ground waves or skywaves interchangeablyDAn average between ground wave and skywave positions
单选题Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals（）.AApproach chartsBGeneral chartsCSailing chartsDCoast charts
单选题The parenthetical remark in lines'110-113 (Never mind that,.the bench) is intended to represent the opinion of ______.Aa superstitious fanBa skeptical analystCa typical coachDa top athleteEa popular sportscaster
单选题Lines drawn through points on the Earth having the same atmospheric pressure are known as （）.AIsothermalBMillibarsCIsobarsDSeismics
单选题All straight lines represent great circle tracks on a chart based on a(n) （）.AMercator projectionBpolyconic projectionCorthographic projectionDgnomonic projection
单选题（）is a comprehensive reference in graphical and textual form of all Admiralty Charts and Publications worldwide（link to Admiralty Charts）listed by region.AOcean Passages for the WorldBSymbols and Abbreviations used on Admiralty Charts，Chart 5011CIALA Maritime Buoyage SystemDCatalogue of Admiralty Charts and Publications
单选题The charts show two dashed lines crossing the river justsouth of St. Catherine Bar Light. What does this indicate? （）AOverhead power linesBLouisiana-Mississippi ferry crossingsCTwo railroad trestlesDTwo submerged oil pipelines
单选题No navigational aids are shown and chart is not kept corrected for alterations in depths inside the pecked lines. For more detailed information, the larger scale charts must be（）.AboughtBanalyzedCconsultedDpublished
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（）.Aon loran charts covering areas where sky waves are usedBin the Radio Aids to Navigation，PUB 117Cin the Loran-C Correction TablesDSky waves cannot be matched to ground waves in LORAN-C to produce a usable reading
单选题Generally，（）are used as the track charts on the high sea，（）are used for harbors，inland waters and coastal areas．AMercator charts／Loran chartsBAdmiralty charts／Routeing chartsClarge scale charts／small scale chartsDsmall scale charts／large scale charts