I'm not sure what the purpose of this ship is, but it appears that it can lower the large columns hundreds of feet beneath it. Perhaps it is to help anchor the many oil platforms in the area.
Telescoping Ship
Anonymous
@ 2008-04-17 14:10:50
I believe they are used for installing offshore wind turbines in relatively shallow water. When the ship has jacked itself out of the water it provides a stable workspace for cranes etc.
SpiderX22
@ 2012-12-16 16:14:17
I don't think it's there anymore