Milspec Ops Monkey has been showing a TFR (temporary flight restriction) for this area for some time now and wondered what the rescue was that was taking so long, now we may have an answer. Not good, very sad.
That part of the oil-patch, there is always another working boat within sight out to minimum eight miles. If someone near shore encountered such a blow, be assured there was radio chatter. VHF 13 between boats often gives 40 or more miles direct. Never hurts to keep an ear open to the grapevine.