British E&P major, EnQuest Plc concluded first ship-to-ship transfer at the Shetland’s Sullom Voe terminal. EnQuest transferred 500,000 barrels of crude oil with the help of the Canadian-registered shuttle tanker, The Heather Knutsen. Environmental groups in other parts of Scotland have been against the practice of ship-to-ship transfers over crude oil over potential oil spill in the sea.