Question 4741 Deck General

The correct answer is C) intact stability curves are valid. The downflooding angle for a MODU (Mobile Offshore Drilling Unit) is the maximum angle at which the intact stability curves remain valid. This is because at angles beyond the downflooding angle, water can enter the vessel through openings, hatches, or other areas, compromising the vessel's stability and rendering the intact stability curves inaccurate. The other options are incorrect because they do not accurately describe the definition of the downflooding angle for a MODU. Neutral equilibrium (A), the load line not being submerged (B), and positive stability (D) are not the defining characteristics of the downflooding angle.