Q: When I lower the position of my cargo on the vessel I find that the roll angle is now increased. Why is this happening?
REV 6.01
A: Changing KG influences not just stability but also the period of peak roll response for the system. If decreasing KG moved the period of peak roll response closer to the peak period of the wave spectrum used in the analysis, than that would increase the roll response. Check the roll RAO curve or table for beam seas.