South Africa's National Sea Rescue Institute (NSRI) has prevented a tanker grounding after it broke a tow rope en route to breakers.

The 47,000-dwt Order (built 2994) was being taken to Maputo for scrapping on Friday when its line separated, fouling the 443-gt, 2011-built Pacific Ocean Engineering tug AHT Carrier's motor and tethering it to the huge ship.

Both began to drift towards the coast, but were still at least 15 miles off at that point, the NSRI said.