While the COASTAL DRILLER is in a normal transit, the roll period is 9 seconds. What is the limiting angle of roll which does not exceed the design limits of the legs?

Correct Answer: Option C — 7°

Standard operating guidelines restrict dynamic hull motions during transit to safeguard structural leg components from fatigue and extreme bending stresses. When maintaining a normal transit roll period of 9 seconds, the designated limiting angle of roll preventing leg design overstress is 7 degrees.