Question 58 RVR04 - Master or Mate of LT 200 GRT

The Correct Answer is A **Explanation for A (Plugging holes or openings):** Progressive flooding refers to the uncontrolled entry and spread of water through a ship's compartments, often following initial damage. Effective control of progressive flooding requires two immediate actions: first, securing the existing watertight boundaries (closing doors, hatches, and valves) to limit the spread of water; and second, stopping the source of the ingress. "Plugging holes or openings" (damage control patching or shoring) directly addresses the source of the flooding, thereby preventing further water entry and allowing for dewatering efforts. This is a fundamental principle of damage control stability. **Why other options are incorrect:** * **B) Abandoning ship:** This is a drastic final measure taken only when all damage control efforts have failed and the ship's survival is deemed impossible. It does not constitute a method for *controlling* the flooding. * **C) Transferring water ballast:** While ballast management (especially deballasting from the side opposite the damage) is sometimes used to correct list or trim, it is a secondary stability measure. It is not the primary action required to *control* or stop the progressive entry of floodwater itself. If the progressive flooding is not controlled, ballast transfer can be ineffective or even destabilizing. * **D) Jettisoning cargo:** Jettisoning cargo can be used to lighten the ship and improve freeboard, which helps reduce the rate of ingress and increases stability margins. However, similar to ballast transfer, it is a stability management action, not a direct action to physically *control* the spread and ingress of water into the hull. Plugging the breach (Option A) must be prioritized to stop the flooding source.