New Horizons is the official expansion pack for Ship Simulator 2008. Try your hand at sailing a luxury cruise liner & a classic yacht or feel the impact of the waves as you guide your fishing vessel home through a storm! New Horizons offers new highly realistic environments and adds eight exciting new vessels for your sailing pleasure. Includes all new missions and free roaming multiplayer mode too!
Source: The Game Website.
This add-on expands the waters with Cornwall and Padstow. It further features 8 new ships and 20 new missions. Also other options in walkthroughs and, for instance, the option to connect and disconnect a barge from a pushboat.