The deal is understood to be initially for 12 months at $28,700 per day, with options for 12 months, plus another 18 months and a further 24 months, and then an option for another two years.

Brokers consider it unlikely that the oil major will pick one of the oldest units in the NAT fleet, which includes 10 pre-2000-built suezmaxes.

The rate is considered fairly low.