To assess the potential for progressive flooding aboard a damaged MODU, you must know the __________.

Correct Answer: Option C — integrity of the watertight boundaries

Progressive flooding occurs when water moves from a damaged compartment to adjacent spaces through failed boundaries. Maintaining the integrity of watertight doors, hatches, and bulkheads is the primary defense against the spread of flooding, which is critical for preserving the MODU’s reserve buoyancy and overall transverse stability.