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Gabon Oil Rig Sinking (Prospector 5): What We Know

By the Undercurrent desk · Published

Video · 3:31 · Watch on YouTube

On Saturday, Oct. 24, 2026, at about 8:37 p.m. local time, Borr Drilling's jackup rig Prospector 5 sank off Mayumba, Gabon, while preparing to drill for BW Energy. 110 of the 115 people aboard were brought to shore. Borr's Nov. 2 notice confirms four deaths and says one worker is still missing; Gabon's state news agency reports the fifth worker was also found (Nov. 1), which Borr has not confirmed. Borr says preliminary information indicates a "punch through event during preload activities." Gabon's petroleum ministry has ordered a technical investigation, and Borr has engaged an independent classification society. Neither has reported a final cause.

What's confirmed

  1. Oct. 24, 2026, about 20:37 localthe Prospector 5, owned and operated by Borr Drilling and contracted to BW Energy, was conducting jacking operations offshore Gabon ahead of a planned drilling campaign when it lost stability and sank. It had not started drilling. (Borr Drilling notice, Oct. 25; Reuters; Offshore Technology)
  2. 115 personnel were on board; 110 were safely accounted for and returned ashore; five were unaccounted for. (Borr Drilling notices, Oct. 25 and Oct. 29; Reuters; Africanews)
  3. Borr's preliminary account: "the rig experienced a punch through event during preload activities, resulting in loss of stability and the subsequent sinking of the rig." This is the company's early information, not an investigation finding. (Borr Drilling notice, Oct. 25)
  4. Gabon's petroleum ministry set up a crisis unit and Minister Clotaire Kondja ordered "the opening of a technical investigation to establish the exact circumstances of the accident and determine responsibility." (Africanews, Oct. 29; Offshore Technology; SAFETY4SEA)
  5. Oct. 28the chief of staff of Gabon's navy said on national television that underwater robots had found three bodies inside the submerged rig. (Africanews; Reuters; Borr Drilling notice, Oct. 29)
  6. Nov. 2Borr said the body of a fourth person had been located; all four have been recovered. Borr's notice says one person is still unaccounted for and the search continues. (Borr Drilling notice, Nov. 2; MarineLink; AFP)
  7. Disputed: Gabon's state news agency reports the body of the fifth and last missing worker was found on Nov. 1. Borr's Nov. 2 notice does not confirm it. (Splash247, citing Gabon's state news agency; also Afrique7, Infos Gabon)
  8. About 280 cubic meters of marine diesel were aboard. No spill has been reported as of Nov. 2; Borr says pollution-response measures are in place with BW Energy and local authorities. (Borr Drilling notice, Oct. 29; Reuters; Offshore Technology)
  9. Borr has engaged a classification society to run an independent investigation. CEO Bruno Morand said it will "assess every potential cause before reaching a final determination." (Borr Drilling notice, Nov. 2)

What we don't know

  • The final cause. The punch-through is Borr's preliminary account; neither the ministry's inquiry nor Borr's outside review has reported findings, and neither has given a date.
  • Whether Borr confirms the fifth worker was found. Gabon's state news agency says so; Borr's latest notice (Nov. 2) says one is missing.
  • Who, if anyone, is responsible. The minister says the technical inquiry will determine that.
  • The workers' names have not been made public. Reports of their nationalities conflict, so we don't repeat them.

What happens next

Borr has not confirmed the fifth worker; Gabon's state news agency says that worker has been found. Gabon's technical investigation and Borr's classification-society review are under way. We'll update this video when either reports, or when Borr confirms the fifth worker.

Chapters

  1. 0:00Gabon oil rig sinking: what we know
  2. 0:19Prospector 5: Borr Drilling's jackup rig
  3. 0:45Prospector 5 punch-through: Borr's account
  4. 1:24Gabon rig search: 110 rescued
  5. 2:08Prospector 5 investigations: what's next

Sources

  1. Borr Drilling notice, Oct. 25, 2026 (Oslo Børs NewsWeb) Primary recordnewsweb.oslobors.no/message/684750
  2. Borr Drilling notice, Oct. 29, 2026 Primary recordnewsweb.oslobors.no/message/685137
  3. Borr Drilling notice, Nov. 2, 2026 Primary recordnewsweb.oslobors.no/message/685283
  4. Reuters via The Star Reportingthestar.com.my/news/world/2026/10/29/three-bodies-recovered-in-gabon-following-sinking-of-borr-drilling-rig
  5. Africanews Reportingafricanews.com/2026/10/29/gabon-oil-rig-disaster-three-bodies-found-two-still-missing/
  6. AFP via The Peninsula Reportingthepeninsulaqatar.com/article/02/11/2026/four-bodies-recovered-from-gabon-oil-rig-underwater-wreckage
  7. Offshore Technology Reportingoffshore-technology.com/news/borr-drilling-prospector-5-sinks-gabon/
  8. Baird Maritime Reportingbairdmaritime.com/security/incidents/accidents/prospector-5-sinks-offshore-gabon
  9. The Maritime Executive Reportingmaritime-executive.com/article/borr-drilling-jackup-loses-stability-and-sinks-off-gabon
  10. MarineLink Reportingmarinelink.com/news/borr-drilling-confirms-fourth-death-gabon-544044
  11. Splash247, "Independent probe follows recovery of final Borr rig victim" (citing Gabon's state news agency) Reportingsplash247.com

The record · as of Nov. 10, 2026

How we know

Primary records are court and agency documents; reporting is news coverage we checked against them. How we report.

What happens next

We check these records for changes: Prospector 5: last missing worker / ministry technical inquiry findings / classification-society cause.

Verified timeline

  1. 2026-10-24At about 20:37 local time, Borr Drilling's jackup rig Prospector 5 (owned and operated by Borr, contracted to BW Energy) lost stability and sank off Mayumba, southern Gabon, during jacking/preload operations ahead of a drilling campaign on the Dussafu licence. It had not started drilling.Borr notice Oct 25; BW Energy release Oct 25; Offshore Technology; Reuters (US News); Splash247
  2. 2026-10-24115 people were aboard; 110 were accounted for and brought ashore (to Port-Gentil per BW Energy and Splash247); five were unaccounted for.Borr notices Oct 25 + Oct 29; BW Energy Q3 slide 3; Reuters; Africanews; Splash247
  3. 2026-10-25Borr Drilling says PRELIMINARY information indicates 'a punch through event during preload activities, resulting in loss of stability and the subsequent sinking of the rig.' Company's early account only; not an investigation finding.Borr notice Oct 25; Offshore Technology; Splash247; SAFETY4SEA
  4. 2026-10-25Gabon's Petroleum and Gas Ministry set up a crisis unit (ministry, navy, Gabon Oil, BW Energy, Borr) and Minister Clotaire Kondja announced 'the opening of a technical investigation to establish the exact circumstances of the accident and determine responsibility.'Africanews; Offshore Technology; Gabonmediatime; Gabonreview
  5. 2026-10-25A judicial investigation was opened by the Tchibanga prosecutor's office into the causes and responsibilities (body recoveries Oct 29-31 were done under the prosecutor's supervision, per the navy). Nobody has been charged, arrested or named as a suspect. Upgrade from earlier single-source status; attribute ('Gabon's prosecutors have opened an investigation').Gabonreview Nov 1 (govt statement); MarineLink; Splash247; Afrique7 (navy)
  6. 2026-10-28BW Energy: MaBoMo production had been shut in before the rig entered the safety perimeter; no damage found; production resumed Oct 28.BW Energy Q3 report p.8; World Oil
  7. 2026-10-28Gabon navy chief of staff (Vice-Adm. Charles Hubert Bekale-Meyong) said on public TV Gabon24 that underwater robots had found three bodies inside the submerged rig; the images did not allow identification. Two people remained missing.Africanews; Reuters via The Star; Borr notice Oct 29; Gabonreview
  8. 2026-10-29BW Energy: of the 115 aboard, 110 were rescued and safely landed in Port Gentil; neighbouring operators Vaalco and Perenco helped the search.BW Energy Q3 presentation slide 3; Gabonmediatime (100 received at Port-Gentil Oct 26)
  9. 2026-10-29Borr notice: an ROV located the bodies of three individuals, recovery under way, two still missing; ~280 cubic meters of marine diesel aboard; pollution-response measures in place with BW Energy and authorities; no spill reported.Borr notice Oct 29 (energy-pedia copy); Reuters via The Star; BW Energy Q3 slide 3
  10. 2026-10-31Bodies recovered from the wreck between Oct. 29 and Oct. 31 (Gabonreview: two on Oct 29, one Oct 30, one Oct 31 -- the per-day split is Gabonreview only).Gabonreview Nov 1; Afrique7 (navy) Nov 2
  11. 2026-10-31Government spokesman Olivier Mouckocko (statement Sat. Oct 31, aired by Gabon24): a coroner identified four bodies; one person still missing, search continuing; the ministry's inquiry conclusions will be made public.AFP via The Peninsula + News Central; Gabonreview Nov 1; tportal.hr Nov 2
  12. 2026-11-02Borr notice: the body of a fourth person was located; four bodies recovered and taken to Port Gentil; one person unaccounted for, search continues. Borr engaged an internationally recognised classification society for an independent investigation; CEO Bruno Morand says it will assess every potential cause before a final determination.Borr notice Nov 2; MarineLink; grafa; Splash247; Direct Infos Gabon
  13. Prospector 5: Friede & Goldman JU-2000E jackup, built 2014 (Shanghai Waigaoqiao).MarineLink; Splash247; Baird Maritime

Also in our research file

Updates and corrections

No corrections to this page. Spot an error? corrections@undercurrentdaily.com

Photos: Borr Drilling (file); Seckoumar / Wikimedia Commons, CC BY-SA 4.0

The punch-through diagram in this video is a general example of how the hazard works, not a reconstruction of this rig.

Spot an error? Email corrections@undercurrentdaily.com. See our corrections policy. Have information about this case? Contact the investigating agency first.

Part of What We Know: open cases, confirmed facts only · YouTube playlist

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