So does ABS. The rules for yachts follow the "standard" IACS wording that the stabilizer be fitted in a watertight compartment or if damaged cannot lead to flooding of auxiliaries or other necessary equipment or create progressive flooding. If they tore a hole in the side because a stabilizer failed to shear off then it was their boat to lose ... they should have been able to contain the flooding to the single compartment. That might have gained them time to receive salvage assistance. But ain't nobody talking ... as is usual in these affairs.