Most of the cargo transported by Mighty Servant 3 are oil platforms and drilling industry related gear.

When loading its mammoth burdens, it takes on thousands of gallons of water into ballast tanks, which causes the cargo deck to submerge.

[3][4] On 6 December 2006, Mighty Servant 3 sank in 62 m (203 ft) of water near the port of Luanda, Angola, while offloading the drilling platform Aleutian Key.

[6] After five months of resting on the seabed, it was salvaged by Dutch salvage-company Smit International and handed back to its owners on 26 May 2007.

To pull the vessel from the seabed, the 1,200 tonne sheerleg Taklift 7 was used in combination with pumping pressurized air into the closed compartments of Mighty Servant 3.