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

题目

All echo-sounders can measure the ______．

A.Actual depth of water

B.Actual depth of water below keel

C.Average depth from waterline to hard bottom

D.Average depth of water to soft bottom

相似考题

1.25． Which of the following is WRONG?A． One animal finds something to eat， and it may be eaten by othersB． At the depth of 3，000 feet under the sea， many animals can find their way by hearing and feeling．C． The deeper the sea is， the darker and colder it is．D． At the depth of 3，000 feet under the sea， all animals can find their way by see-ing．

2.The distance between the surface of the water and the tidal datum is the ______.A.range of tideB.height of tideC.charted depthD.actual water depth

3.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

4.Can you measure oil level? Which method is right, to measure ullage height or to measure oil depth?

更多“All echo－sounders can measure the ______.A.Actual depth of waterB.Actual depth of water be ”相关问题

  • 第1题：

    To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is ______．

    A.the actual depth

    B.added to or subtracted from the charted depth

    C.multiplied by the charted depth

    D.divided by the charted depth


    正确答案：B

  • 第2题：

    You are anchoring in 16 fathoms of water．On a small to medium size vessel，the ______．

    A.Anchor may be dropped from the hawse pipe

    B.Anchor should be lowered to within 2 fathoms of the bottom before being dropped

    C.Scope should always be at least ten times the depth of the water

    D.Scope should always be less than 5 times the depth of the water


    正确答案：B

  • 第3题：

    In determining the scope of anchor line to pay out when anchoring a small boat, one must consider the ______.

    A.charted depth of water only

    B.depth of water, including tidal differences

    C.time and date of anchoring

    D.type of anchor being used


    正确答案：B
    小船抛锚，在确定送出锚链长度时，必须考虑包括潮汐不同的水深。

  • 第4题：

    单选题
    In moderate wind and current what should be the length of chain with a single anchor?（）
    A

    5 times the depth of the water in good holding ground

    B

    10 times the depth of the water in shallow water

    C

    2 times the depth of the water in poor holding ground

    D

    8 times the depth of the water in deep water


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    There is not（）depth of water around the area centered at the lighthouse.
    A

    ample

    B

    sufficient

    C

    enormous

    D

    incredible


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    What should you apply to a fathometer reading to determine the depth of water?（）
    A

    Subtract the draft of the vessel

    B

    Add the draft of the vessel

    C

    Subtract the sea water correction 

    D

    Add the sea water correction


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    You are anchoring in 16 fathoms of water．On a small to medium size vessel，the（）.
    A

    Anchor may be dropped from the hawse pipe

    B

    Anchor should be lowered to within 2 fathoms of the bottom before being dropped

    C

    Scope should always be at least ten times the depth of the water

    D

    Scope should always be less than 5 times the depth of the water


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    The controlling depth of the river is（）.
    A

    the minimum depth of the river prescribed in the channel maintenance program

    B

    the edge of a dredged channel

    C

    the highest level to which the river may rise without flooding

    D

    the least available water in a channel which limits the draft of boats and tows


    正确答案： B
    解析： 暂无解析

  • 第9题：

    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 depth

    B

    added to or subtracted from the charted depth

    C

    multiplied by the charted depth

    D

    divided by the charted depth


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    In bad weather，what length of chain should be used with a single anchor? （）
    A

    3 times the depth of water

    B

    6 times the depth of water

    C

    10 times the depth of water

    D

    15 times the depth of water


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    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


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    When anchoring a vessel under normal conditions，which scope of chain is recommended? （）
    A

    Four times the depth of water

    B

    Two and one-half times the depth of water

    C

    Five to seven times the depth of water

    D

    Fifteen times the depth of water


    正确答案： A
    解析： 暂无解析

  • 第13题：

    The recording fathometer produces a graphic record of the ______．

    A.bottom contour only up to depths of 100 fathoms

    B.depth underneath the keel against a time base

    C.contour of the bottom against a distance base

    D.depth of water against a distance base


    正确答案：B

  • 第14题：

    Air gap is the vertical distance between the bottom of the hull and the ______．

    A.Still water level

    B.Wave crest

    C.Wave crest plus the charted water depth and tidal corrections

    D.Wave crest plus the charted water depth and tidal correction and storm surge


    正确答案：A

  • 第15题：

    单选题
    When anchoring,it is a common rule of thumb to use a length of chain（）.
    A

    five to seven times the depth of water

    B

    seven to ten times the depth of water

    C

    twice the depth of water

    D

    twice the depth of water plus the range of tide


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    Air gap is the vertical distance between the bottom of the hull and the（）.
    A

    still water level

    B

    wave crest

    C

    wave crest plus the charted water depth and tidal corrections

    D

    wave crest plus the charted water depth and tidal correction and storm surge


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    The height of tide is the （）.
    A

    depth of water at a specific time due to tidal effect

    B

    difference between the depth of the water and the area's tidal datum

    C

    difference between the depth of the water and the high water tidal level

    D

    difference between the depth of the water at high tide and the depth of the water at low tide


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    The distance between the surface of the water and the tidal datum is the （）.
    A

    range of tide

    B

    height of tide

    C

    charted depth

    D

    actual water depth


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    Stand of the tide is that time when（）.
    A

    the vertical rise or fall of the tide has stopped

    B

    slack water occurs

    C

    tidal current is at a maximum

    D

    the actual depth of the water equals the charted depth


    正确答案： D
    解析： 暂无解析

  • 第20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


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    To safely anchor a vessel there must be sufficient scope in the anchor cable. Scope is the ratio of（）.
    A

    weight of cable to weight of vessel

    B

    weight of cable to weight of anchor

    C

    length of anchor to depth of water

    D

    length of cable to depth of water


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    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


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    All echo-sounders can measure the（）.
    A

    actual depth of water

    B

    actual depth of water below keel

    C

    average depth from waterline to hard bottom

    D

    average depth of water to soft bottom


    正确答案： B
    解析： 暂无解析

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