If the charted water depth is 200 feet, the limits of service for the COASTAL DRILLER require an air gap of __________.

Correct Answer: Option C — 30 feet

Operating manuals for jack-up units like the COASTAL DRILLER specify mandatory air gaps based on water depth and wave crest height criteria to prevent extreme wave action from striking the hull platform, requiring a 30-foot air gap at a 200-foot charted depth.