Cristóbal Colón Launches as the World's Largest Trailing Suction Hopper Dredger

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• Mining09/15/2026@BuildDesk

  Polymetal Installs Its Record 1,100-Tonne Gold Autoclave at Amursk

  Amursk, Khabarovsk Krai, RussiaPolymetal International

  

  Starts 08/17/2020CONFIRMED87% CONFIDENCE6.1 years agoInternational Mining reported on 17 August 2020 that Polymetal's 1,100-tonne autoclave vessel had been installed on schedule at the Amursk POX-2 site.^[1]

  Belgian engineering firm Coek Engineering built the world's largest gold-processing autoclave, a 1,100-tonne titanium-lined pressure vessel, and shipped it 25,000 km from Antwerp to Polymetal's Amursk POX-2 plant in Russia's Far East. The vessel was installed on schedule in August 2020.

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• Marine09/15/2026@BuildDesk

  Damen Delivers Heavy-Lift Vessel Fairplayer to Jumbo Maritime

  Damen Shipyards Galați, Strada Alexandru Moruzzi 132, Galați, RomaniaJumbo Maritime

  

  Starts 01/01/2008ESTIMATED65% CONFIDENCE18.7 years agoVessel registries and marine trade press list Fairplayer's (IMO 9371579) build year as 2008 at Damen Shipyards Galați; no exact delivery day is published, so the date is estimated to the year.^[1]

  Fairplayer's twin 900-tonne cranes combine for an 1,800-tonne tandem lift, among the largest of any heavy-lift ship afloat. Built by Damen Shipyards Galati in Romania, she entered service with Dutch heavy-lift specialist Jumbo Maritime in 2008.

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• Marine09/15/2026@BuildDesk

  MV Solitaire Enters Service as the World's Largest Pipelay Vessel

  Wallsend, Tyne and Wear, United KingdomAllseas

  

  Starts 01/01/1998CONFIRMED87% CONFIDENCE28.7 years agoAllseas^[3]' own fleet page states Solitaire has operated "since her launch in 1998"; only the year is documented, not an exact day.

  MV Solitaire, converted from a 1972 bulk carrier into a 300-metre pipelaying ship, entered service for Allseas in 1998 and became the world's largest and most powerful pipelay vessel.

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• Aerospace09/15/2026@BuildDesk

  The Hawaii Mars Flying Boat Retires to a British Columbia Museum

  British Columbia Aviation Museum, Sidney, British Columbia, CanadaCoulson Aviation

  

  Starts 08/11/2024CONFIRMED83% CONFIDENCE2.1 years agoThe Aviationist^[4] and Skies Mag^[3] reported that Hawaii Mars made its final retirement flight to the British Columbia Aviation Museum on August 11, 2024.

  On August 11, 2024, the Martin JRM Mars flying boat "Hawaii Mars" made its final flight, escorted by Snowbirds jets, ending 78 years of service as the world’s largest water bomber.

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• Marine09/20/2026@BuildDesk

  The Houston Ship Channel's Project 11 Widening Finishes

  Houston Ship Channel, Galveston Bay reach near Morgans Point, TexasPort Houston

  

  Starts 12/31/2029ESTIMATED63% CONFIDENCEin 3.3 yearsPort Houston's project page describes "expediting the process to complete the work in 2029", a year rather than a day, so it sits at the end of that year.^[1]

  Project 11 widens the channel by 170 feet along its Galveston Bay reach, from 530 to 700 feet, and deepens upstream segments to 46.5 feet so the largest container ships can pass one another. Dredging began in 2022; Port Houston finished its own segments in October 2025 and the US Army Corps of Engineers is completing the rest, with the spoil building bird islands, marsh and oyster reef.

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• Marine09/15/2026@BuildDesk

  Wilhelmsen Launches Tønsberg as the World's Largest Ro-Ro Ship

  Mitsubishi Heavy Industries Nagasaki Shipyard, Nagasaki, JapanWilhelmsen Group

  

  Starts 10/02/2010CONFIRMED84% CONFIDENCE16.0 years agoWikipedia's^[4] MV Tønsberg article gives the launch date as 2 October 2010, built by Mitsubishi Heavy Industries for the Wilh. Wilhelmsen Group and noted as the largest RoRo ship in the world when built.

  Wilh. Wilhelmsen launched the 265-meter Tønsberg at Mitsubishi Heavy Industries' Nagasaki shipyard, the largest roll-on/roll-off vessel ever built at the time. The ship carries luxury cars, SUVs, and outsized construction equipment across the world's oceans.

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• Marine09/15/2026@BuildDesk

  MV Faust Launches as One of the World's Largest Car Carriers

  1 Aju-dong, Geoje-si, Gyeongsangnam-do, South KoreaWallenius Wilhelmsen

  

  Starts 02/24/2007CONFIRMED75% CONFIDENCE19.6 years agoWikipedia's^[3] MV Faust article states she was launched on 24 February 2007 by Daewoo Shipbuilding & Marine Engineering.

  MV Faust can carry up to 8,000 cars across her multiple decks, making her one of the largest roll-on/roll-off vehicle carriers ever built. Launched by Daewoo Shipbuilding & Marine Engineering in 2007, she has weathered rogue waves and icy seas while ferrying vehicles for Wallenius Wilhelmsen.

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• Marine09/15/2026@BuildDesk

  Paul R. Tregurtha Enters Service as the Great Lakes’ Largest Ship

  Lorain, Ohio, USAInterlake Steamship Company

  

  Starts 05/10/1981CONFIRMED85% CONFIDENCE45.4 years agoWikipedia's^[3] MV Paul R. Tregurtha article gives 10 May 1981 as the ship's maiden voyage, following its 4 February 1981 launch as the William J. DeLancey.

  Launched as the William J. DeLancey and later renamed Paul R. Tregurtha, the Great Lakes' longest ship began hauling cargo with its maiden voyage on 10 May 1981.

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• Aerospace09/15/2026@BuildDesk

  Felbermayr Hauls Two Giant Autoclaves to FACC's Innviertel Plants

  Aschach an der Donau, AustriaFACC

  

  Starts 11/27/2017CONFIRMED85% CONFIDENCE8.8 years agoFelbermayr's^[3] own account of the job states the barge carrying the two autoclaves reached the Aschach an der Donau port on 27 November 2017, ahead of the final road transport to FACC.

  Austrian heavy-haul specialist Felbermayr moved two industrial autoclaves weighing over 300 tons combined from Germany, via the Danube, to aerospace composites maker FACC's plants in Austria's Innviertel region.

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• Marine09/15/2026@BuildDesk

  MSC Meraviglia Megaship Delivered at Saint-Nazaire Shipyard

  Saint-Nazaire, FranceChantiers de l'Atlantique

  

  Starts 05/31/2017CONFIRMED88% CONFIDENCE9.3 years agoMSC Cruises' own press release states the Meraviglia was delivered and came into service on 31 May 2017 ("MSC CRUISES CELEBRATES THE COMING INTO SERVICE OF MSC MERAVIGLIA").^[1]

  MSC Cruises took delivery of the 315-metre, 171,598-tonne MSC Meraviglia from the STX France shipyard in Saint-Nazaire, one of the largest cruise ships ever built, carrying more than 5,700 guests.

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• Transport09/15/2026@BuildDesk

  Expanded Panama Canal Opens to Neopanamax Ships

  Cocoli Locks, Panama Canal, PanamaPanama Canal Authority

  

  Starts 06/26/2016CONFIRMED90% CONFIDENCE10.2 years agoHappened as dated, per the source^[1]: "Later this afternoon, the vessel will reach the Pacific-facing Cocoli Locks where the official Inauguration ceremony will take place."

  A nine-year, $5.25 billion expansion of the Panama Canal was inaugurated, adding a wider Third Set of Locks for larger Neopanamax vessels.

  $5.3B

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• Transport09/14/2026@ThePinGang

  Mont Cenis Base Tunnel Opens

  Val-Cenis, Savoie, FranceTELT

  

  Starts 12/31/2033SCHEDULED84% CONFIDENCEin 7.3 yearsGiven as scheduled, per the source^[1]: the base tunnel "is expected to be commissioned by the end of 2033"; telt.eu^[2] confirms "La date d'achèvement est prévue en 2033", a year later than the earlier 2032 target.

  At 57.5 km, the Mont Cenis Base Tunnel will be the world's longest rail tunnel, carrying the new Lyon–Turin railway under the Alps between Saint-Jean-de-Maurienne, France, and Susa, Italy.

  €11.1B

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