搜题

【单选题】

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

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更多“Mean low water is the average height of（）.”相关的问题

第1题

[单选题] 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

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第2题

[单选题] 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

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第3题

[] The reference datum used in determining the heights of land features on most charts is（）.

A、A.mean sea level B、B.mean high water C、C.mean low water D、D.half-tide level

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第4题

[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（）.

A、mean high water B、mean low water C、half-tide level D、mean sea level

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第5题

[单选题] The shoreline on charts generally represents the mean（）.

A、High water line B、Low water line C、Low water spring line D、Tide level

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第6题

[单选题] Contour elevations on this chart refer to heights in feet above mean （）.

A、lower low water B、high water C、low water D、sea level

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第7题

[] Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.

A、A.lower low water B、B.high water C、C.low water D、D.sea level

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第8题

[单选题] Clearance gauges at bridges indicate （）.

A、the height of the tide B、depth of water under the bridge C、charted vertical clearance at mean low water D、distance from the water to low steel of the bridge

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第9题

[单选题] 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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