MarineBuzz brings us this amazing photo of the M/V Beluga Gravitation. They also note:

Some of the interesting features of transportation are:

• In the month of August 2008, she sailed from Nantong, China to Rotterdam with three vessel hulls in multi layers.
• A 110 metres vessel hull was placed on top of 135 metres vessel hull. A third hull of 86 metres was placed alongside the other two hulls.
• Safe navigation was provided by an additional radar on the bow as the cargo units were 14 metres high.