This Ship Sinks Itself to Lift a 67,000-Ton Cruise Ship

In July 2019, a cruise ship more than a thousand feet long was lifted completely out of the sea off Grand Bahama. No crane did it. The ship underneath, the BOKA Vanguard, had flooded its own ballast tanks, sunk its deck under the surface, and then pumped itself back up with the cruise ship on top. Using Boskalis footage, drone footage of the Carnival Vista operation, U.S. Navy imagery and original diagrams, we explain how a semi-submersible heavy-lift ship sinks on purpose, why it stays upright with its deck under water, how a damaged destroyer, the USS Cole, was carried home the same way, and what happened when one of these ships did not come back up. CHAPTERS 00:00 A cruise ship comes out of the sea 00:40 A dry dock that wasn't there 01:27 How a ship sinks on purpose 02:07 The moment it could tip 03:18 Parking a cruise ship on a sunken deck 04:05 Longer than the deck 04:58 What it was built to carry 05:33 Carrying a warship home 06:41 When the deck doesn't come back up 07:30 Back on the surface SOURCES Boskalis, "Boskalis to dry dock Carnival cruise ship on the BOKA Vanguard" (2 July 2019): https://gardline.com/media/anchbevh/boka_v... Boskalis, "Unique sighting with Carnival cruise ship on top of the BOKA Vanguard" (15 July 2019): https://gardline.com/media/yz2non52/vangua... Boskalis Horizons no. 7, "Hasta la Vista" (July 2020): https://magazine.boskalis.com/issue07/vista Boskalis semi-submersible heavy transport vessel specifications: https://boskalis.com/media/er5hhygw/semi-s... Offshore, "Dockwise targets giant platforms, offshore maintenance for latest vessel" (2012): https://www.offshore-mag.com/vessels/artic... The Maritime Executive, Vista floating dry dock (2019): https://maritime-executive.com/article/bos... Seatrade Cruise News, Grand Bahama Shipyard crane collapse (2019): https://www.seatrade-cruise.com/shipbuildi... Malin Group, float-on/float-off stability: https://malingroup.com/2025/05/23/intricac... Offshore, Jack/St. Malo hull leaves shipyard (2013): https://www.offshore-mag.com/rigs-vessels/... Dockwise Vanguard and the Goliat FPSO: https://gardline.com/about-us/news/dockwis... Stars and Stripes, Blue Marlin and USS Cole (28 Oct 2000): https://man.fas.org/dod-101/sys/ship/docs/... U.S. Department of Defense briefing (31 Oct 2000): https://man.fas.org/dod-101/sys/ship/docs/... Bradley Peniston, USS Samuel B. Roberts aboard Mighty Servant 2: https://www.navybook.com/?p=622 Professional Mariner, Mighty Servant 3 sinking (2007): https://professionalmariner.com/heavy-lift... gCaptain, Mighty Servant 3 cause and salvage: https://gcaptain.com/mighty-servant-3-sinks FOOTAGE Boskalis (official channel), short excerpts credited for commentary and education: "BOKA Vanguard loading Carnival Vista", "Animation BOKA Vanguard dry docking Carnival Vista", "Dockwise Vanguard transport gigantic Goliat FPSO", "Dockwise Vanguard loading Hermod", "Transport FPSO Armada Intrepid onboard the Dockwise Vanguard", "Float-on operation Aasta Hansteen" and "Heavy Marine Transport P70 FPSO". CCL Drone, short excerpts credited for commentary and education: "Carnival Vista lifting out of water", "BOKA Vanguard sailing with Carnival Vista onboard", "Carnival Vista approach BOKA Vanguard". dBTV (Wayne Harris), short excerpts credited for commentary and education: "Boka Vanguard Heavy Lift Vessel Transports Oil Rig". U.S. Department of Defense video (DVIDS 365984 and 365987), public domain. Photographs, public domain U.S. Government work: Sgt. Don L. Maes, USMC (USS Cole at Aden, Defense.gov 001030-M-0557M); PO2 Leland Comer, USN; PA2 Patrick Montgomery, USCG (DVIDS 1081571, 1081578); PH2 D. Kevin Elliott, USN, and DoD/DVIC (USS Samuel B. Roberts on Mighty Servant 2), via Wikimedia Commons and DVIDS. Mighty Servant 3 off Angola, December 2006: photograph by a crew member, released to the public domain (Wikimedia Commons). Independent educational production; the companies shown do not endorse this channel. Original script, editing and explanatory graphics. Graphics are labelled simplifications. Narration generated with AI.