sentences:  After the acquisition of Kværner, Aker took ownership of the yard.In 2006, Aker Philadelphia Shipyard delivered the final vessel in a four-ship series of containerships to Matson Navigation Company.With that, the yard transitioned to building a series of Veteran Class MT46 double-hulled product tankers for bareboat charter to Overseas Shipholding Group, a build program that extends into 2012.