The Norwegian AAIB has commissioned the salvage ship Polar Prince and has commenced search of the ocean floor using an ROV.
According to aftenposten.no, good radar plots of the accident is suspected to help in locating the wreckage. (There is a SSR at an hilltop of approx 1000ft on Sotra island just to the east of the suspected crash site. It should have clear view down to sfc) MOD coastal radars are in the vicinity as well.
The names of the crew was released today:
Knut Brunborg (45), captain
Jan Einarsen (60), captain.
Inge Marius Vågsberg (29), first officer