Dense fog played havoc with air traffic overnight and this morning. Although two early morning flights managed to leave Sumburgh, all incoming flights have been delayed until around noon.
The flight from Aberdeen due to arrive at 7.45am was unable to get in and had to return to Aberdeen.
At Scatsta a spokesman said once the weather conditions offshore became suitable it was hoped to complete at least some of their fixed wing and helicopter flying programme. It was possible that at least six helicopter flights would take place, primarily to the east Shetland basin.
Last night some oil workers had to travel south on the NorthLink ferry as planes could not leave Scatsta due to heavy fog in Aberdeen.