(a) Describe, with the aid of a sketch, how a hydraulically operated folding hatch cover opens and closes. (7) (b) Explain how the water tightness and security of the hatch cover sketched in part (a) can be ascertained before proceeding to sea. (3)
(a) Describe, with the aid of a sketch, how a hydraulically operated folding hatch cover opens and closes. (7) (b) Explain how the water tightness and security of the hatch cover sketched in part (a) can be ascertained before proceeding to sea. (3)
UKM Tuticorin 
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