Question 4751 Deck General

The correct answer is D) It lowers the center of gravity. Jettisoning topside weight from a mobile offshore drilling unit (MODU) serves to lower the center of gravity. Reducing the weight high up on the structure lowers the overall center of gravity, which improves the MODU's stability and makes it less prone to capsizing or rolling over in rough seas or other adverse conditions. This is an important safety consideration for MODUs, which need to maintain stability and avoid potential stability-related incidents. The other answer choices are incorrect because: A) Returning the MODU to an even keel is not the primary purpose of jettisoning topside weight; B) Raising the center of gravity would actually decrease stability; and C) Reducing free surface effect is a separate stability consideration not directly related to jettisoning topside weight.