Borr Lost a Drilling Rig to the Seabed

On Saturday night, October 24, 2026, Borr Drilling's jack-up rig Prospector 5 sank off Mayumba, Gabon, while setting up next to BW Energy's MaBoMo platform on the Dussafu Marin licence. Borr says preliminary information points to a punch-through during preload, followed by a loss of stability; Gabon's oil ministry says the seabed gave way under one of the rig's supports. Of 115 people on board, 110 are safe. Borr and Gabon's government say five are unaccounted for; Reuters, citing a union official, reported one of them was found dead, which the government has not confirmed. The search continues. In order: what officials have said; how a jack-up stands on the seabed and why it preloads; how a punch-through happens (our own diagram, not to scale); the 2021 Naga 7 sinking off Sarawak; and what happens next (search, investigation, MaBoMo, diesel on board). Sources: Borr Drilling statements (Oct 25 and 26) and Prospector 5 spec sheet; Reuters via gCaptain; World Oil; The Maritime Executive; Offshore Magazine; Offshore Energy; Baird Maritime; Gabonreview; Gabonmediatime (Gabon government communique, Oct 25); Gabonactu (President Oligui Nguema); Drilling Manual and Pisys (how preload and punch-through work); Offshore Magazine and The Maritime Executive (Naga 7, May 2021). Footage (short clips, muted): Gabon 1ere; phone video of the night via Gabon 1ere and Generation Afrique Libre; Notre Gabon; Mark Bedder (Prospector 1, Borr's sister rig of the same design, labelled); Carlsen Bulk Handling and Dorsea International animations (labelled); Ace Rig Move training film (labelled); Offshore Spotter (Naga 7, 2021). Diagrams: Port Report illustration, not to scale. Maps: Natural Earth; positions approximate, not for navigation. No victims are named or shown. Causes are as stated by the company and the ministry; investigators have not published a finding. Sources: https://gcaptain.com/borr-drilling-ri... https://www.worldoil.com/news/2026/10... https://www.prnewswire.com/news-relea... https://maritime-executive.com/articl... https://www.offshore-mag.com/vessels/... https://www.globalbankingandfinance.c... https://www.bairdmaritime.com/securit... https://www.offshore-energy.biz/2026/... https://www.offshore-mag.com/special-... https://www.gabonreview.com/prospecto... https://gabonmediatime.com/naufrage-d... https://gabonactu.com/blog/2026/10/25... https://api.borrdrilling.com/wp-conte... https://www.drillingmanual.com/jack-u... https://pisys.co.uk/2026/04/10/punch-... https://maritime-executive.com/articl...