One of them was the capsizing of the U.S. warship Firebrand, drowning 39 sailors.
On Tiller and Florida's small trip while rafting down a river, their boat capsizes and Tiller suffers a heart attack. Luckily, Dallas, Sairy, and Z find them and Tiller is taken to a hospital where he recovers.
However, the capsizing of the torpedo boat Tomozuru called into question the stability of all Japanese warship designs.