Blue Marlin is a semi-submersible heavy lift ship from Dockwise Shipping of the Netherlands. Designed to transport very large semi-submersible drilling rigs above the transport ship’s deck, it is equipped with 38 cabins to accommodate 60 people, a workout room, sauna and swimming facilities. Blue Marlin and her sister ship MV Black Marlin comprise the Marlin class of heavy lift ship. Basically this is a ship shipping ships! She has also been seen carrying very large military vessel, piles of container ships, oil rig etc. The Blue Marlin look like a ship inception!
Via Humans at Sea
The blue Marlin carrying an Oil Rig