单项选择题

The bridge should inform the engine room before passing through congested or shallow waterway（）

A.24 hours
B.2 hours
C.1 hours
D.15 minutes

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During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）

A.excess amount of oily-water mixtures in bilges
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C.improper operation of bilge pumping arrangements
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