Q3 (16 Marks) Hull Construction
SC&S • Written Exam

During a voyage, sea water is found leaking into the engine room through a small hole in the ship side plating. What type of repairs will you carry out as an immediate action as a second engineer? What are the other actions and reporting procedures undertaken by the vessel to comply with class and flag requirements and procedures? How will you ensure that prompt and thorough repairs are undertaken as a permanent measure? (16)

Appeared In: Aug 2025

Verified Model Answer (Text Solution)

Structured for DG Shipping MEO Class II examination scoring criteria.

Exam Ready

Immediate, reporting and permanent repair actions for a small hole in the engine-room side plating.

Part (a)

Immediate action (as second engineer):

  • Raise the alarm and inform the bridge/chief engineer; stop or reduce the flooding by closing the sea inlet/outlet valves in the vicinity if the hole is near a sea chest, and isolate the affected area.
  • Attempt to stop or reduce the inflow: apply a temporary patch - a softwood plug, a wooden wedge, a collision mat, a steel plate patch with a rubber gasket held by a strongback and wedges, or a cement box (a wooden box filled with quick-setting cement) over the hole. Use a shore/strongback and wedges to hold the patch against the pressure.
  • Pump out the water using the bilge and ballast pumps, and use the emergency bilge suction; keep the water level down and monitor the bilge.
  • Reduce the pressure on the hole by trimming the ship (e.g. ballast to raise the damaged side or reduce the head) and by reducing speed to lower the dynamic pressure.
  • Isolate the compartment, close watertight doors, and keep the engine-room watch; monitor the level and the patch continuously.
  • If the hole is small and accessible, a temporary welded patch or a bolted patch with a gasket can be fitted once the area is dried and gas-free.
Part (b)

Other actions and reporting to comply with class and flag requirements:

  • Report the incident to the master, who reports to the company (DPA/technical superintendent) and, as required, to the flag state and the coastal state (if in territorial waters) and to the port state on arrival.
  • Make a full entry in the deck and engine log books, and record the damage, the temporary repair, and the water ingress.
  • Notify the classification society (class) of the damage; class will require a survey of the damage and the temporary repair, and will issue conditions of class or a recommendation for a permanent repair before the ship proceeds or within a specified time.
  • The ship should proceed to a port of refuge/repair as directed, and the temporary repair must be maintained and monitored during the voyage.
  • Comply with the ISM code (reporting, non-conformity, corrective action), and with the flag state's requirements for reporting marine casualties/incidents.
Part (c)

Ensuring prompt and thorough permanent repair:

  • Arrange for the permanent repair at a suitable repair yard or by an approved repairer, with the damaged plate renewed (renewal of the shell plate or a welded insert plate of the correct grade and thickness), the surrounding structure inspected for corrosion/fatigue, and the weld carried out to class-approved procedures by certified welders.
  • The repair must be surveyed and approved by the classification society surveyor, with NDT (ultrasonic, dye-penetrant) of the welds as required, and the plate thickness and material certified.
  • After repair, carry out a watertightness test (hose test or air test) and restore the protective coating (paint/antifouling) and any insulation.
  • Update the class records and the ship's drawings, and close out the condition of class; the permanent repair should be completed before the ship returns to unrestricted service, and the temporary patch removed.
← Back to SC&S Question Bank Upload Recent Question Paper →