Arne Blystad-led Songa Container has quietly grown its boxship fleet with the purchase of nine vessels in behind-the-scenes deals.

Until now, Songa Container was understood to have purchased only four such vessels, but five further deals have emerged.

The nine ships were built between 2007 and 2014 with capacities between 1,036 teu and 3,762 teu.

None of the deals have been reported and they are believed to have been negotiated through German banks.