Question 3472 Deck General

The correct answer is C) surge. Surge is the forward and backward motion of a vessel, which can significantly affect the tension on mooring lines of a Mobile Offshore Drilling Unit (MODU). This is because the surge motion causes the MODU to move towards and away from the mooring lines, directly impacting the loads they experience. The other options, such as yaw, roll, and pitch, are less likely to have a significant impact on mooring line tensions compared to surge. Yaw is the rotation around the vertical axis, roll is the rotation around the longitudinal axis, and pitch is the rotation around the transverse axis, all of which have a lower impact on the mooring line tensions.