The soundings on the chart are based on the depth of water available at ______.A.mean low waterB.mean lower low waterC.mean high waterD.mean high water springs
The soundings on the chart are based on the depth of water available at ______.
A.mean low water
B.mean lower low water
C.mean high water
D.mean high water springs
相关考题：
Clearance gauges at bridges indicate ______.A.the height of the tideB.depth of water under the bridgeC.charted vertical clearance at mean low waterD.distance from the water to low steel of the bridge
The height of a light is measured from which reference plane?A.Mean low waterB.Mean high waterC.Average water levelD.Geographical sea level
The height of tide is the ______.A.depth of water at a specific time due to tidal effectB.difference between the depth of the water and the area's tidal datumC.difference between the depth of the water and the high water tidal levelD.difference between the depth of the water at high tide and the depth of the water at low tide
Charted depth is the ______.A.vertical distance from the chart sounding datum to the ocean bottom，plus the height of tideB.vertical distance from the chart sounding datum to the ocean bottomC.average height of water over a specified period of timeD.average height of all low waters at a place
The heights and soundings of Admiralty chart are expressed ______ in Fathoms ______ in Meters．A.either，orB.neither，norC.another，norD.other，or
Charted depth is the ______.A.vertical distance from the tidal datum to the ocean bottom plus the height of the tideB.vertical distance from the tidal datum to the ocean bottomC.average height of water over a specified period of timeD.average height of all low waters at a place
The recording fathometer produces a graphic record of the ______．A.bottom contour only up to depths of 100 fathomsB.depth underneath the keel against a time baseC.contour of the bottom against a distance baseD.depth of water against a distance base
Air gap is the vertical distance between the bottom of the hull and the ______．A.Still water levelB.Wave crestC.Wave crest plus the charted water depth and tidal correctionsD.Wave crest plus the charted water depth and tidal correction and storm surge
When taking soundings on a ship，coating the tape with chalk helps to ______．A.Better identify the correct readingB.Show the depth of any water in an oil tankC.Make the tape roll easierD.Reduce possibility of sparks
All echo-sounders can measure the ______．A.Actual depth of waterB.Actual depth of water below keelC.Average depth from waterline to hard bottomD.Average depth of water to soft bottom
Chart depth is the ______.A.vertical distance from the tidal datum to the ocean bottom, plus the height of tideB.vertical distance from the tidal datum to the ocean bottomC.average height of water over a specified period of timeD.average height of all low waters at a place
Chart depth is the ______.A.vertical distance from the chart sounding datum to the ocean bottom, plus the height of tideB.vertical distance from the chart sounding datum to the ocean bottomC.average height of water over a specified period of timeD.average height of all low waters at a place
In what units are heights and soundings in the chart? They are in ______.A.meters and fathomsB.fathoms and metersC.meter and fathomD.fathom and meter
单选题The heights and soundings of Admiralty chart are expressed（）in Fathoms（）in Meters．Aeither，orBneither，norCanother，norDother，or
单选题When anchoring,it is a common rule of thumb to use a length of chain（）.Afive to seven times the depth of waterBseven to ten times the depth of waterCtwice the depth of waterDtwice the depth of water plus the range of tide
单选题In moderate wind and current what should be the length of chain with a single anchor?（）A5 times the depth of the water in good holding groundB10 times the depth of the water in shallow waterC2 times the depth of the water in poor holding groundD8 times the depth of the water in deep water
单选题Air gap is the vertical distance between the bottom of the hull and the（）.Astill water levelBwave crestCwave crest plus the charted water depth and tidal correctionsDwave crest plus the charted water depth and tidal correction and storm surge
单选题You want to create a pie-style chart using the Chart Wizard. What must be you do to determine the fields available for use in this chart? （）ASelect the block that contains the data to appear in the pie chart. BSelect the table that contains the data to appear in the pie chart. CSelect the view that contains the data to appear in the pie chart. DNothing. The wizard will automatically create the pie chart based on the highlighted data.
单选题The height of tide is the （）.Adepth of water at a specific time due to tidal effectBdifference between the depth of the water and the area's tidal datumCdifference between the depth of the water and the high water tidal levelDdifference between the depth of the water at high tide and the depth of the water at low tide
单选题Stand of the tide is that time when（）.Athe vertical rise or fall of the tide has stoppedBslack water occursCtidal current is at a maximumDthe actual depth of the water equals the charted depth
单选题The controlling depth of the river is（）.Athe minimum depth of the river prescribed in the channel maintenance programBthe edge of a dredged channelCthe highest level to which the river may rise without floodingDthe least available water in a channel which limits the draft of boats and tows
单选题The soundings on the chart are based on the depth of water available at （）.Amean low waterBmean lower low waterCmean high waterDmean high water springs
单选题In determining a safe speed（）shall not be among those taken into account.Athe presence of the background light at nightBthe state of wind，sea and currentCthe number of crew on boardDthe draught in relation to the available depth of water
单选题Charted depth is the（）.Avertical distance from the tidal datum to the ocean bottom plus the height of the tideBvertical distance from the tidal datum to the ocean bottomCaverage height of water over a specified period of timeDaverage height of all low waters at a place
单选题Charted depth is the （）.Avertical distance from the chart sounding datum to the ocean bottom，plus the height of tideBvertical distance from the chart sounding datum to the ocean bottomCaverage height of water over a specified period of timeDaverage height of all low waters at a place
单选题All echo-sounders can measure the（）.Aactual depth of waterBactual depth of water below keelCaverage depth from waterline to hard bottomDaverage depth of water to soft bottom
单选题The soundings on the imperial chart are measured in（）.AFeetBYardsCFathomsDMeters