Fjord Line's Stavangerfjord and Bergensfjord serve on the Hirthals-Stavanger-Bergen route. Stavangerfjord was the first large passenger ship solely operating on liquefied natural gas. A brief description of the technical aspects of Stavangerfjord is found at ship-technolgoy.com; Stavangerfjord is also featured in the 2014 shippax GUIDE Magazine.
There are several interesting videos available online:
Fjord Line Video Channel @ YouTube
Launch of Bergensfjord @ YouTube
Rolls-Royce Marine 'Fjord Line Customer Case Study' @ YouTube
Exterior Views of Stavangerfjord @ YouTube
WATCH VIDEO CLIP
arrives @ Bergen