Clearance gauges at bridges indicate （）.<br>A:the height of the tide<br>B:depth of water under the bridge<br>C:charted vertical clearance at mean low water<br>D:distance from the water to low steel of the bridge

Clearance gauges at bridges indicate （）.
A:the height of the tide
B:depth of water under the bridge
C:charted vertical clearance at mean low water
D:distance from the water to low steel of the bridge

出自：海船船员证

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