Quote Originally Posted by Frank S View Post
All too often riggers either miscalculate or don't have the proper sling lengths or capacities for the lift they are tasked with doing.
Yup. Sounds plausible. Lets make the assumption that the lifting lugs are placed roughly square on the deck of that boat. Looking from the side those slings look roughly 45 degrees. But if you work out the angles in 3D, what looks like 45 degrees from the side is actually about 35 degrees with respect to the plane of the rope. Then there's a whole ton of dynamic loads that they almost certainly didn't take into account with that thing sloshing all over the place. And they probably overloaded one of those slings like crazy when they impacted the deck of the crane vessel. It's hard to tell from the video, but I don't see any softeners on that hook either. And what are they in the middle of a hurricane? Ever lift I've ever been on has been shut down if there's more than a stiff breeze.

So a comedy of errors and incompetence.