The numeral in the center of a wind rose circle on a pilot chart indicates the ______.A.total number of observationsB.average wind force on the Beaufort scaleC.average wind force in knotsD.percentage of calms
The numeral in the center of a wind rose circle on a pilot chart indicates the ______.
A.total number of observations
B.average wind force on the Beaufort scale
C.average wind force in knots
D.percentage of calms
相关考题：
A pilot chart does NOT contain information about ______.A.average wind conditionsB.tidal currentsC.magnetic variationD.average limits of field ice
Magnetic information on a chart may be ______.A.found in the center(s) of the compass rose(s)B.indicated by isogonic linesC.found in a note on the chartD.All of the above
Solid green arrows on the main body of a pilot chart indicate ______.A.prevailing wind directionsB.prevailing ocean current directionsC.probable surface current flowD.shortest great circle routes
The compass rose on a nautical chart indicates both variation and ______.A.deviationB.annual rate of variation changeC.precessionD.compass error
What is the major advantage of a rhumb line track?A.The vessel can steam on a constant heading (disregarding wind，current，etc)B.The rhumb line is the shortest distance between the arrival and departure pointsC.It is easily plotted on a gnomonic chart for comparison with a great circle courseD.It approximates a great circle on east-west courses in high latitudes
Positions read from this chart should be moved 0．08 minutes Southward and 0．13 minutes Eastward so as ______ adjoining chart 344，．A.to agree uponB.in accordance withC.to be same asD.to agree with
In the Northern Hemisphere, when the wind at your location is northerly, the low pressure center causing the wind is located to your ______.A.NNWB.WSWC.ESED.SSW
引水员的房间在驾驶台隔壁。（）A、The pilot room is next to the chart room.B、The pilot room is next to the wheelhouse .C、The pilot room is next to the captain’s cabin.
引航员的房间在驾驶台隔壁。（）A、The pilot room is next to the chart room.B、The pilot room is next to the wheelhouse .C、The pilot room next to the captain’s cabin.D、The pilot room next to the wheelhouse .
单选题引航员的房间在驾驶台隔壁。（）AThe pilot room is next to the chart room.BThe pilot room is next to the wheelhouse .CThe pilot room next to the captain’s cabin.DThe pilot room next to the wheelhouse .
单选题On a nautical chart，the inner ring of a compass rose indicates（）.Atrue directionsBcompass errorCdeviationDmagnetic directions
单选题Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours.You should（）.AExpect to see cirrus clouds followed by altostratus and nimbostratus cloudsBAlter course to remain in the navigable semicircleCPrepare for gusty winds，thunderstorms，and a sudden wind shiftDExpect clear weather，with steady winds and pressure，until the front passes
单选题Solid green arrows on the main body of a pilot chart indicate （）.Aprevailing wind directionsBprevailing ocean current directionsCprobable surface current flowDshortest great circle routes
单选题A chart position enclosed by a semi-circle is a(n) （）.AfixBestimated positionCdead reckoning positionDrunning fix
单选题引水员的房间在驾驶台隔壁。（）AThe pilot room is next to the chart room.BThe pilot room is next to the wheelhouse .CThe pilot room is next to the captain’s cabin.
单选题A circle with center A has its center at (6, -2) and a radius of 4. Which of the following is the equation of a line tangent to the circle with center A ?Ay＝3x+2By＝2x+1Cy＝-x+5Dy＝-2Ey＝-6
单选题An instrument that indicates wind direction is known as a(n)（）.Aweather vane，wind vane or wind sockBhydrometerChygrometerDsling psychrometer
单选题The compass rose on a nautical chart indicates both variation and （）.AdeviationBannual rate of variation changeCprecessionDcompass error
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Two circles, P and Q, lie in the same plane. If the center of circle Q lies on circle P, then in how many points could circle P and circle Q intersect?Ⅰ. 0Ⅱ. 1Ⅲ. 2AⅠ onlyBⅡ onlyCⅢ onlyDⅠ, Ⅱ and ⅢEⅡ and Ⅲ only
单选题The numeral in the center of a wind rose circle on a pilot chart indicates the （）.Atotal number of observationsBaverage wind force on the Beaufort scaleCaverage wind force in knotsDpercentage of calms
单选题In the Northern Hemisphere，when the wind at your location is northerly，the low pressure center causing the wind is located to your（）.ANNWBWSWCESEDSSW
单选题Magnetic information on a chart may be （）.Afound in the center(s) of the compass rose(s)Bindicated by isogonic linesCfound in a note on the chartDAll of the above
单选题A pilot chart does NOT contain information about （）.Aaverage wind conditionsBtidal currentsCmagnetic variationDaverage limits of field ice
单选题Which aid is NOT marked on a chart with a magenta circle? （）AAero lightBRadar stationCRadar transponder beaconDRadiobeacon