I guess it was primarily (or entirely?) crew-change cabs?
according to one quality newspaper there were 4 coastguard aircraft involved, 3 from Aberdeen and one from Norway.
coastguard statement said three rescue helicopters and 4 civilian. this one is more correct!!
i dont know the actual details but i know there were CHC and Bristow aircraft involved and CHC at least have been heavily involved in shuttling and moving over last couple of days. was a blue white and red helicopter lifted the last crew off the elgin early morning monday.