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Class 2 (2nd Engineer) SC&S 📅 Sep 2025

Exam Question

With reference to Underwater Inspection in lieu of Dry docking (UWILD): 

(a) Explain in detail, how an underwater survey is carried out. 

(b) State the requirements to be fulfilled before an underwater survey is acceptable to the surveying authority. 

(c) Construct a list of the items in order of importance that the underwater survey authority should include.

Reference Answer

(a) An underwater survey, also known as Underwater Inspection in Lieu of Dry Docking (UWILD), involves a systematic and detailed examination of a vessel’s hull and underwater components while the ship remains afloat. The procedure includes the following steps:
The shipowner sends a request to the classification society surveyor, indicating the intention to perform an underwater survey.
A detailed plan of the ship's external hull features is submitted, showing the location of frames, bulkheads, welding lines, openings, etc.
The hull surface is cleaned before the survey to remove any marine growth or fouling that could obscure the inspection.

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