Question 4648 Deck General

The correct answer is B) watertight. Structural bulkheads on a Mobile Offshore Drilling Unit (MODU) are designed to be watertight in order to maintain the vessel's stability and integrity in the event of damage or flooding. Watertight bulkheads are required by regulations to prevent the spread of water throughout the vessel, which could compromise its safety and survivability. The other answer choices are incorrect because: A) transverse bulkheads are a type of watertight bulkhead, but not the only type; C) continuous bulkheads may not necessarily be watertight; and D) non-watertight bulkheads would not serve the critical purpose of containing water in an emergency.