单选题开航前对测深仪进行检查,要求零点显示准确,浅水区域的深度误差不超过±1米,深水区域不超过±5米,或指示深度的(),取其大者。A3%B4%C5%D6%
单选题
开航前对测深仪进行检查,要求零点显示准确,浅水区域的深度误差不超过±1米,深水区域不超过±5米,或指示深度的(),取其大者。
A
3%
B
4%
C
5%
D
6%
参考解析
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