There were 2 Duck Boats out, and the other made it to shore. Makes me wonder if it was captain experience, or luck.
Luck IMHO
All it was going to take was 2 waves back to back close enough together and they were swamped...
That water was WAY too rough to be taking out one of those craft loaded down with joy riders out. Now weather can turn on a dime, so they may just have been too far out when it turned to get back.