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The datum from which the predicted heights of tides are reckoned in the tide tables is ______.
A.mean low water
B.the same as that used for the charts of the locality
C.the highest possible level
D.given in table three of the tide tables
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更多 “ The datum from which the predicted heights of tides are reckoned in the tide tables is ______.A.mean low waterB.the same as that used for the charts of the localityC.the highest possible levelD.given in table three of the tide tables ” 相关考题
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The distance between the surface of the water and the tidal datum is the______．A.height of tideB.charted depthC.actual water depthD.range of tide
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From ______ the mariner can know the data of tide．A.the Sea PilotB.the Cargo PlanC.the Tide TableD.the Port List
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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
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Admiralty Easy Tide ______．A.has little use for ocean-going marinersB.permits the mariner to select and simultaneously calculate tidal heights for multiple ports for up to seven daysC.includes periods of daylight and nautical twilight，moon phases and a springs and neaps indicatorD.is supplied in the form of a single CD which contains the calculation program and the seven geographic Area Data Sets（ADS）providing global coverage
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In which of the following situations should correlation names be used?（）A、A table referenced in the FROM clause has no indexed column.B、The table referenced in the FROM clause has more than 200 columns.C、Two or more tables in the FROM clause have identical column names.D、The FROM clause contains two or more tables in the SELECT statement.
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单选题The reference datum used in determining the heights of land features on most charts is（）.A
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Admiralty Maritime CommunicationsB
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单选题（）gives daily predictions of the times and heights of high and low waters for over 230 standard and 6，000 secondary ports in the world.A
Admiralty Tide TablesB
Admiralty Tidal Stream AtlasesC
Admiralty Manual of TidesD
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单选题Rising tides of unemployment claims across the state has led the governor to declare the economy to be in a state of emergency.A
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Because the rising tideC
The tide is risingD
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单选题When there are small differences between the heights of two successive high tides or two successive low tides，the tides are called（）.A
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单选题The difference between the heights of low and high tide is the（）.A
periodB
rangeC
distanceD
depth
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单选题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
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单选题A tide is called diurnal when（）.A
only one high and one low water occur during a lunar dayB
the high tide is higher and the low tide is lower than usualC
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单选题Which statement is TRUE concerning apogean tides（）．A
They occur only at quadratureB
They occur when the Moon is nearest the EarthC
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They have a decreased range from normal
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单选题In which case would you use a FULL OUTER JOIN? （）A
Both tables have NULL values.B
You want all unmatched data from one table.C
You want all matched data from both tables.D
You want all unmatched data from both tables.E
One of the tables has more data than the other.F
You want all matched and unmatched data from only one table.
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单选题In which of the following situations should correlation names be used?（）A
A table referenced in the FROM clause has no indexed column.B
The table referenced in the FROM clause has more than 200 columns.C
Two or more tables in the FROM clause have identical column names.D
The FROM clause contains two or more tables in the SELECT statement.
考题
单选题The datum from which the predicted heights of tides are reckoned in the tide tables is（）.A
mean low waterB
the same as that used for the charts of the localityC
the highest possible levelD
given in table three of the tide tables
考题
单选题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
考题
单选题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
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