Q3. A. With reference to the underwater surface of a ship’s hull; i. Describe a hull plate roughness analyser system;
ii. State the significance of the roughness profile and compare the typical roughness values for a new ship and a ship eight years old;
B. Which reference to the application of self-polishing paint in dry dock - i. Describe the plate preparation necessary;
ii. State the defects that may occur in the paint coating if it is not correctly applied.
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