单选

A channel is started as having a controlling depth of 38 feet. Which statement is TRUE?_____

  • A.At least 80% of the channel is cleared to the charted depth.
  • B.At least 50% of the channel is cleared to the charted depth.
  • C.100% of the channel depth is clear to 38 feet.
  • D.The sides of the channel conform to at least 50% of the controlling depth.
参考答案
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