Hi, here is the video of the salvage of the diver CL whose umbilical was severed due to a DP failure on the Bibby Topaz in 2012

http://www.youtube.com/watch?v=x4dcxL-b-l0

And this will help you to understand what happened on the Bibby Topaz

http://marqua.se/wp-content/uploads/2012/10/Bibby-Topaz-incident.pdf