The meaning of ebb tide is that ______.A.tide is falling from high water to low waterB.tide is rising from low water to high waterC.tide is reaching to a highest levelD.tide is reaching to a lowest level
The meaning of ebb tide is that ______.
A.tide is falling from high water to low water
B.tide is rising from low water to high water
C.tide is reaching to a highest level
D.tide is reaching to a lowest level
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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
The period at high or low tide during which there is no change in the height of the water is called the ______.A.range of the tideB.plane of the tideC.stand of the tideD.reversing of the tide
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The average height of the surface of the sea for all stages of the tide over a 19 year period is called ______.A.mean high waterB.mean low waterC.half-tide levelD.mean sea level
To predict the actual depth of water using the Tide Tables,the number obtained from the Tide Tables is ______.A.the actual depthB.added to or subtracted from the charted depthC.multiplied by the charted depthD.divided by the charted depth
What alarm is NOT found on an inert gas system ________.A.Low oxygen alarmB.Low pressure alarmC.Scrubber high water level alarmD.Deck seal low water alarm
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单选题In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream,and is called a().AseicheBboreCboundary waveDsurge
单选题Variations in the color of sea water from blue to green seem to be caused by high or low concentrations of salt.AChanges BDescriptions CMeasures DClarity
单选题The daily predictions of the times and heights of high and low water for a selection of Standard Ports are given in().AAdmiralty Maritime CommunicationsBAdmiralty Tide TablesCa comprehensive guide for the yachtsmanDALRS
单选题In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n)().Aapogean tideBdouble high waterCperigean tideDbore
单选题What describes a flood current().AHorizontal movement of the water toward the land after high tideBHorizontal movement of the water toward the land after low tideCHorizontal movement of the water away from the land following high tideDHorizontal movement of the water away from the land following low tide
单选题The height of a light is measured from which reference plane?()AMean low waterBMean high waterCAverage water levelDGeographical sea level
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The difference between the heights of low and high tide is the().AperiodBrangeCdistanceDdepth
单选题The direction of the surface wind is().Adirectly from high pressure toward low pressureBdirectly from low pressure toward high pressureCfrom high pressure toward low pressure deflected by the earth's rotationDfrom low pressure toward high pressure deflected by the earth's rotation
单选题The average height of the surface of the sea for all stages of the tide over a 19 year period is called().Amean high waterBmean low waterChalf-tide levelDmean sea level
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To predict the actual depth of water using the Tide Tables,the number obtained from the Tide Tables is().Athe actual depthBadded to or subtracted from the charted depthCmultiplied by the charted depthDdivided by the charted depth
单选题A tide is called diurnal when().Aonly one high and one low water occur during a lunar dayBthe high tide is higher and the low tide is lower than usualCthe high tide and low tide are exactly six hours apartDtwo high tides occur during a lunar day
单选题The tide().It’s 2 hours before low water,and()your present position you will be aground at low water.Afalls/inBhas been falling/onChas fallen/atDis falling/in
单选题The meaning of ebb tide is that ().Atide is falling from high water to low waterBtide is rising from low water to high waterCtide is reaching to a highest levelDtide is reaching to a lowest level
单选题One of the causes of ocean currents is density differences in the water. This is true because ().Ain an area of high density the water's surface is lower than in an area of low densityBsurface water flows from an area of high density to one of low densityCthe lesser the density gradient the freer the water is to moveDit is the density differences that cause the currents to stay in the troughs
单选题The period at high or low tide during which there is no change in the height of the water is called the ().Arange of the tideBplane of the tideCstand of the tideDreversing of the tide