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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(驾驶专业) > 航海英语 > 航海仪器 > 航海仪器使用说明书

单项选择题

What will NOT induce errors into a doppler sonar log?（）

A.Increased draft
B.Pitch
C.Roll
D.Change in trim

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The microsecond unit of time is used in radar applications. The microsecond represents which of the following?（）.

A.one-millionth part of a second
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