What is the normal length of anchor cable used to anchor a vessel?（）<br>A:An amount equal to the depth of the water<br>B:Two times the depth of water<br>C:Three to four times the depth of water<br>D:Five to seven times the depth of water

What is the normal length of anchor cable used to anchor a vessel?（）
A:An amount equal to the depth of the water
B:Two times the depth of water
C:Three to four times the depth of water
D:Five to seven times the depth of water

出自：海船船员证

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