Question 5086 Deck General

The correct answer is D) determine the cause before taking countermeasures. When a MODU (Mobile Offshore Drilling Unit) experiences a sudden, severe list or trim from an unknown cause, it is critical to first determine the root cause before taking any corrective actions. Assuming the cause and immediately responding could potentially make the situation worse. The appropriate first step is to assess the situation, gather information, and diagnose the problem before implementing any countermeasures. This is in line with standard maritime safety practices, which emphasize the importance of identifying and addressing the underlying issue rather than reacting hastily. The other options, while potentially relevant in some scenarios, do not represent the prudent initial response to an unknown severe list or trim.