It is proposed to moor the DEEP DRILLER in 600 feet of water in a region in which the effective wind velocity could reach 80 knots, significant wave height could reach 30 feet, and the current could be 1.5 knots. If these conditions occurred at the same time from the beam, the total environmental force would be __________.

Correct Answer: Option A — 620 kips

Beam environmental loading maximizes transverse projected area exposure. Combined forces from an 80-knot wind, 30-foot significant wave height, and 1.5-knot current striking the beam yield a higher aggregate load profile, reaching a total environmental force of 620 kips as determined from rig-specific stability manuals.