717. While drilling loaded as shown in Sample Load Form Number 4 (Drilling), the DEEP DRILLER suffers a sudden unexpected starboard and aft inclination. The wind and waves are light. What might have caused the inclination?

Sudden starboard and aft inclination, with light wind and waves, is most likely caused by the drilling crew dumping mud, which rapidly shifts the center of gravity aft and starboard due to the significant weight loss from forward and port mud pits.