Use the floodable length curve in Section 1, the blue pages, of the Stability Data Reference Book. If the curve represents 45 percent permeability and number 1 hold floods, the vessel will sink if the permeability exceeds what percent?

Correct Answer: Option C — 71

Floodable length curves derived per SOLAS subdivision standards correlate compartment permeability with margin line submergence. Using stability reference documentation, floodable length decreases as permeability increases. Exceeding the standard 45 percent baseline to 71 percent eliminates remaining buoyancy reserves, causing vessel sinking during No. 1 hold flooding.