Hi Thomas,
I hope the seatime is mounting up and all is going well!
Thanks for posting the 'Petrel' video.
All very interesting, and still no true explanation of what occurred.
The commentator kept referring to the 'braces', but to pass your Naval Arch exams, I would suggest the correct terminology is used.
They are called 'Breast Shores', and even when I used to dock on flat-bottomed bulk ships we still had plenty of them in place, mainly due to the sudden high winds we get around NZ, and the velocities experienced when the wind passed down the ship's sides when in a floating dry dock.
Cheers,
TonyS.