There’s quite a good ‘animation’ from a company called Nsea on the internet, for their TUP system which used to work in the southern sector of the North Sea.
Here is the link if anyone else is interested.
Thanks. That looks a lot like the small portable sat systems of the 1970s and 80s.
Considering that they are decompressing divers out after each lockout, I wonder how they justify a hyperbaric lifeboat requirement? Is it really any different than using Sur-D-O2? Divers can't get out of the deck chamber too early without getting seriously bent, regardless if they are using Sur-D-O2 or a closed bell.
Handling bells over the side is nasty business in the North Sea. Wasn't the last one the Wildrake? For other readers, see A Fantastic Adventure Book About Commercial Diving - Into the Lion's Mouth
On the other hand, it is probably not much worse than launching an open bottom bell over the side. Do you see many work/supply boats with moonpools?