The dive support vessel CSO Wellservicer is currently standing by to possibly salvage the "ditched" aircraft
The Wellservicer is indeed being used to salvage the aircraft, as it was carrying out work for BP in the area. Apparently the gear is down and there were plans to lift the aircraft onto deck by putting slings and shackles around the gear. I think that plan may have changed and it is preferable for the helicopter to sink in order for divers to properly secure the aircraft with slings in order to prevent further damage when lifting.