He takes over the chairmanship on 1 October from Lord Mountevans, who has held the post since February 2014.
Dingle was appointed Chairman of Carnival UK in October 2014, having previously been CEO from June 2007 with responsibility for P&O Cruises and Cunard.
He is also director and former president of the UK Chamber of Shipping, and sits on the board of the European Community Shipowners Association (ECSA).