New York-listed Overseas Shipholding Group (OSG) has declared its options to extend charterers on six US-flagged tankers bareboated from American Shipping for another three years.

The three-year terms will commence in December 2023, and comes a month after OSG handed back a trio of 46,810-dwt product tankers to Oslo-listed American Shipping in a move it claimed would free it from $27m in annual fixed payment obligations.