The COASTAL DRILLER, while in an ocean transit, experiences a single amplitude roll of 8 degrees. What is the minimum period of motion which does not exceed the design limits of the legs?

Correct Answer: Option A — 10 seconds

A 10-second minimum roll period provides adequate structural dynamic damping during ocean transits, preventing excessive bending moments and fatigue stresses on the mobile offshore drilling unit's elevated or transit leg structures as mandated by class and operational manuals.