The DEEP DRILLER is loaded as shown in Sample Load Form #5 (Survival). While the unit is deballasting, starboard valve 5 fails in the closed position. You may deballast from tank 2S by pumping from tank 1S after opening valves 6 and __________.

Correct Answer: Option C — 2

System manifold cross-connections on the DEEP DRILLER permit alternate suction routes; failing starboard valve 5 requires opening valves 6 and 2 to establish a viable suction path from tank 1S to complete deballasting operations.