Question 4925 Deck General

The correct answer is A) righting moment equals the wind-heeling moment. When a wind force causes a floating MODU (Mobile Offshore Drilling Unit) to heel to a static angle, the righting moment, which is the force that counteracts the wind-heeling moment, will be equal to the wind-heeling moment. This is a fundamental principle of stability for floating structures. The righting moment, generated by the underwater shape of the MODU, balances the wind-heeling moment, resulting in a static heel angle. The other options are incorrect because: B) deck-edge immersion may occur but is not the defining characteristic, C) the downflooding point being below water is not relevant to the static heel condition, and D) the centers of buoyancy and gravity being in the same vertical line is not necessary for the static equilibrium described in the question.