I think that is pretty much how I have always understood it. I have also heard an argument that because she was moving and touched the starboard side first the momentum of the ship pushed her over, which then allowed the free surface effect to push her a lot further. What doesn't seem to be taken into consideration with the argument regarding cross flooding and hence lifeboat numbers is the fact that the free surface effect will be considerable in a completely cross flooded compartment. Ships are now designed to remain afloat with any two compartments flooded, she had three and they were adjacent.
Basically if she had not touched the rocks on the starboard side she may have sunk in an upright attitude however she may well have then gone down completely with a lot more loss of life. The same saving grace as The Herald Of Free Enterprise.
I think that allowing full ships capacity in the lifeboats on both sides is a significant worry and has not really been made public nor openly discussed. The Concordia was a huge warning that we have so far ignored.
I suspect the Wahine suffered similarly to the Herald with a very large open car deck allowing a free surface effect capable of capsizing her.
It is an interesting experiment when you get your hands on a new fibreglass hull before you start a build. Place the required amount of solid ballast in it to bring it down to its marks in a bath full of water. Push the hull around and get a feel for its stability. Then replace the solid ballast with a similar weight of water and pour it into the hull. Push it around again. The difference is really surprising.
Added to your comments above with regards to the 5000+ passenger ships, the crew in charge of lifeboat stations are invariably non seafaring, very young and completely incapable of directing a large number of very agitated passengers. Also take into consideration that they are in the process of developing a 370 man lifeboat. Can you imagine a team of very young restaurant staff controlling that number of passengers as they board a single lifeboat?
Edited By Richard Simpson on 19/06/2021 19:46:30