The UK P&I Club has urged crew to check ship to ship transfer (STS) hoses after a spill involving a tanker.
Senior loss prevention executive David Nichol said an unnamed vessel had been fixed for a transfer operation offshore.
A flexible cargo hose supplied by the STS company was connected between the respective vessels' manifolds.
During the operation, the hose ruptured near the receiving ship's manifold, causing oil to spray on deck and overboard.