While in 150 feet water depth when the single amplitude roll angle of the COASTAL DRILLER is 1 degree, the safe platform roll period for going on location should be longer than __________.

Correct Answer: Option C — 7.0 seconds

Site-specific arrival and pre-loading procedures outlined in the unit operating manual correlate single amplitude roll angles with minimum safe platform natural roll periods. In 150 feet of water with a 1-degree roll, dynamic amplification control mandates a natural roll period exceeding 7.0 seconds.