284. 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 holds 1 and 2 flood, the vessel will sink if the permeability exceeds what percent?

The vessel will sink if the permeability exceeds 32%. This is determined by referencing the floodable length curve for 45% permeability in the Stability Data Reference Book, where the combined length of holds 1 and 2 reaches the sinking limit at 32% permeability.