The cargo ship MV Priscilla was successfully re-floated, said Her Majesty's Coastguard (HM Coastguard), a section of the Maritime and Coastguard Agency in UK.
Following an initial assessment it was agreed she was in safe condition to be towed to Scapa Flow, Orkney Isles.
The vessel will arrive tomorrow morning and will go to safe anchorage where a further assessment, including an underwater dive inspection, will be carried out.
The ship with six crew on board ran aground on the Pentland Skerries last Wednesday.
The Priscilla remained hard aground with the crew safely on board while the owner and the authorities made plans for a larger-scale salvage effort.
The salvor companies - Multraship/Ardent/Wagenborg - removed 28 tonnes of Marine Gas Oil (MGO) from the vessel.