Question 4718 Deck General

The correct answer is B) gross tonnage. The intact volume above the waterline of a floating MODU (Mobile Offshore Drilling Unit) is the vessel's gross tonnage. Gross tonnage is a measure of the enclosed volume of a ship, calculated based on the vessel's overall dimensions, and it represents the total enclosed volume of the vessel above the waterline. This volume is important for various regulatory and operational purposes, including stability calculations and vessel registration. The other options are incorrect because: A) displacement volume refers to the volume of water displaced by the vessel, C) reserve buoyancy is the additional buoyancy available above the waterline, and D) net tonnage is a measure of the useful, cargo-carrying capacity of the vessel, which is not the same as the intact volume above the waterline.