As there is a very limited bottom time at 50 mtrs doing any work not really possible.
50 mtrs is the limit for diving using compressed air. Any deeper and it’s a mixed gas dive.
At those depths the air or gas you breath is far more dense which limits what you could do.
The access into the wreck is going to be very very tricky indeed
You could get lost just getting around the Yacht on the surface but at that depth with all the dive gear that you need horrendous.
I would suspect that she will have to be lifted to the surface before any access can be made. Otherwise top notch professional divers and support team required.
I’m way out of date with Technical or even sport diving these days.
Just looked at BSAC Dive tables from 1988, they are far more extensive now as various gas mixtures included and the guidelines very technical.
As you cannot access them online ( purchase only)
Allan C.
