mean high water
mean low water
half-tide level
mean sea level
第1题：
The distance between the surface of the water and the tidal datum is the______．
A.height of tide
B.charted depth
C.actual water depth
D.range of tide
第2题：
Charted depth is the ______.
A.vertical distance from the chart sounding datum to the ocean bottom，plus the height of tide
B.vertical distance from the chart sounding datum to the ocean bottom
C.average height of water over a specified period of time
D.average height of all low waters at a place
第3题：
On which of the following statements would the author most probably agree?
[A] Non-Americans add to the average height of the nation.
[B] Human height is conditioned by the upright posture.
[C] Americans are the tallest on average in the world.
[D] Larger babies tend to become taller in adulthood.
题干中提到“most probably..”，通过排出法，可以确定B为最佳选项。
第4题：
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 water
B.mean low water
C.half-tide level
D.mean sea level
第5题：
All of the following can be found on a Pilot Chart EXCEPT information concerning the ______.
A.percentage of frequency of wave heights
B.percentage of poor visibility conditions
C.sea surface temperatures
D.amounts of precipitation
第6题：
The height of a light is measured from which reference plane?
A.Mean low water
B.Mean high water
C.Average water level
D.Geographical sea level
第7题：
Charted depth is the ______.
A.vertical distance from the tidal datum to the ocean bottom plus the height of the tide
B.vertical distance from the tidal datum to the ocean bottom
C.average height of water over a specified period of time
D.average height of all low waters at a place
第8题：
A: is
B: have been
C: are
D: was
第9题：
Mean low water is the average height of ______.
A.the surface of the sea
B.high waters and low waters
C.all low waters
D.the lower of the two daily low tides
第10题：
Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from ______.
A.low steel on the Huey P. Long Bridge
B.mean sea level
C.the local water table
D.the minimum dam control level