BOKA Vanguard is a semisubmersible heavy-lift ship owned and operated by Dockwise B.V. Dockwise Vanguard is the largest vessel of her type ever built, and is able to carry cargoes up to 110,000 tonnes. Dockwise Vanguard was designed to move offshore oil and gas facilities, but can also carry other ships and act as an offshore dry-dock facility.
Dockwise Vanguard without cargo in Maasmond, Rotterdam in 2014
Mighty Servant 1 is a 29,000-ton heavy-lift ship capable of carrying very large vessels and offshore platforms. Built for Dutch shipping firm Wijsmuller Transport, which merged in 1993 with Dock Express Shipping to become Breda-based offshore heavy lifting group, Dockwise Shipping B.V. Mighty Servant 1 carried structures such as oil rigs and floating drydocks. Originally 40 m (130 ft) wide, she was increased to 50 m (160 ft) in 1999 to lift the production rig Petrobras 36 or P36.
After being positioned over the submerged deck of Mighty Servant I at Algeciras, Spain, 1 April 1992, Tonkawa (YTB-786) and Eufaula (YTB-800), and the mine countermeasures ship USS Guardian (MCM-5) wait to be raised out of the water.