Oman’s Asyad Shipping has agreed to sell three of the oldest tankers in its fleet for a combined OMR68.44m ($178m) as the Muscat-listed owner accelerates the replacement of ageing tonnage with a large slate of newbuildings. The company is selling the 2011-built VLCCs Seeb and Samail for a combined OMR61.7m ($160.5m). A separate transaction covers …