In this drone video by DudezUAV, you'll get an aerial view of one of the world's most unusual ships. It's called the BOKA Vanguard, and it's the largest semi-submersible heavy lift ship in the world. Built in South Korea's Hyundai shipyards, the vessel was launched in 2012. It's used for transporting extremely heavy cargo such as floating oil rigs to their drilling locations around the world. It's also capable of carrying other ships. Using massive ballast tanks, the BOKA is capable of carrying up to 110k tons.