Solve ship stability problems: calculate metacentric height (GM) from a list, apply the free surface correction for slack tanks, determine the effect of an off-centre weight on list, and evaluate the GZ righting-lever curve for minimum stability criteria. Covers the USCG Deck General stability examination module — consistently the second-hardest section of the officer exam after celestial navigation.
Stability failures are responsible for a significant fraction of maritime casualties worldwide. This game builds the numerical intuition to recognize a stability problem before it becomes dangerous and to calculate the correct corrective action.