What is the purpose of patching and plugging in DC?

• A. To allow water into compartments for cooling.
• B. To mark damaged areas.
• C. To replace damaged hull sections.
• D. To stop water ingress and restore watertight integrity.

Answer: (D)

Patching and plugging are rapid damage control actions used after hull damage to control flooding. The main purpose is to stop water from entering compartments and to restore watertight integrity so the ship remains afloat while permanent repairs are arranged. Patching covers the damaged area with a temporary plate or patch material to seal the breach, while plugging seals holes or openings to prevent water from being driven in. Together, they create a temporary watertight barrier that stabilizes the vessel and buys time for further repairs. They are not means to let water in for cooling, nor for marking damage, nor for replacing hull sections.