 Complete the following phrase:  Of the six ships, MV Longstone and Beachy Head were on charter to the civilian company Transfennica operating a RoRo cargo ferry service in the Baltic Sea, connecting Hanko in Finland and Lübeck in Germany. Most recently they have been operating on the Immingham to Cuxhaven route for DFDS. Other ships have also been involved in commercial activity with other companies and other militaries. All ships are available to the MoD at very short notice if required. The first four ships have been kept almost constantly busy on MoD duties since the build-up to the 