Spirit of Discovery - Loss of Propulsion in Heavy Weather, Bay of Biscay, Over 100 Injuries, Fatality
Summary
The UK Marine Accident Investigation Branch published report 6/2026 regarding the passenger vessel Spirit of Discovery, which lost propulsion on 4 November 2023 while crossing the Bay of Biscay in heavy weather. Over 100 passengers were injured and one passenger later died from injuries. MAIB identified safety issues including propeller exposure and automatic shutdown, propulsion pods positioning at 90 degrees, and inadequate implementation of mass casualty incident plans. Recommendations were made to the Maritime and Coastguard Agency, classification societies, the propulsion manufacturer, and Cruise Lines International Association regarding electronic inclinometers, instruction manuals, and medical personnel qualifications.
What changed
MAIB published its investigation report into the 4 November 2023 loss of propulsion incident aboard Spirit of Discovery, where over 100 passengers were injured and one died after the vessel encountered heavy weather in the Bay of Biscay. The report identifies key safety issues: violent motion caused propeller exposure and automatic shutdown; both propulsion pods unexpectedly parked at 90 degrees; the decision to cross the Bay of Biscay was not effectively challenged; mass casualty incident plans were inadequately implemented; and delayed identification of a spinal injury led to suboptimal treatment.\n\nAffected parties include the Maritime and Coastguard Agency, classification societies, propulsion manufacturers, and cruise line operators. MAIB recommendations include proposing international carriage requirements for electronic inclinometers, improving instruction manual quality, issuing customer advice notes for similar pod-equipped vessels, increasing Advanced Trauma Life Support-qualified medical personnel on passenger vessels, and updating policies on securing vessel furniture in heavy weather. Industry stakeholders should review these recommendations and assess their current practices against the identified safety gaps.
What to do next
- Review MAIB safety recommendations regarding propulsion system vulnerabilities in heavy weather
- Assess mass casualty incident response procedures aboard passenger vessels
- Evaluate medical personnel qualifications and furniture securing policies on cruise vessels
Archived snapshot
Apr 16, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
Loss of propulsion in heavy weather experienced by the passenger vessel Spirit of Discovery, leading to over 100 injuries and one fatality
Location: Bay of Biscay.
From: Marine Accident Investigation Branch Published 11 March 2026 Vessel type: Merchant vessel 100 gross tons or over Report type: Investigation report Date of occurrence: 4 November 2023
Accident Investigation Report 6/2026
Read our marine accident investigation report, which includes what happened, subsequent actions taken and recommendations:
MAIB investigation report 6-2026: Spirit of Discovery
Summary
Shortly after 1230 on 4 November 2023, the passenger vessel Spirit of Discovery lost propulsion in heavy weather while crossing the Bay of Biscay. Over 100 passengers were injured during this period. Eight of the seriously injured passengers were taken directly to hospital on arrival into port and one of these passengers later died from his injuries.
Safety issues
- the vessel lost propulsion due to violent motion causing propeller exposure, overspeed and automatic shutdown
- the initial loss of control was exacerbated by unexpected parking of both propulsion pods at 90 degrees to the vessel’s heading
- the decision to cross the Bay of Biscay was not effectively challenged by the crew and operational teams ashore
- the lack of implementation of the mass casualty incident plan contributed to the medical team becoming overstretched
- the delay in identifying that a passenger had suffered a spinal injury led to him receiving suboptimal treatment. Statement from the Chief Inspector of Marine Accidents
Recommendations
Recommendations have been made to the Maritime and Coastguard Agency to propose that international carriage requirements include electronic inclinometers, and to the vessel’s classification societies to improve the quality of instruction manuals.
The propulsion manufacturer has been recommended to issue a customer advice note to owners of vessels fitted with similar pods.
The Cruise Lines International Association has been recommended to increase the number of medical personnel with an Advanced Trauma Life Support qualification carried on passenger vessels and to update its policies on the securing of vessel furniture in heavy weather.
Related publications
NTSB/MAR-08/01: Crown Princess
MAIB report 14/2009: Pacific Sun
Photograph credit
Image courtesy of Lambros Kakes (MarineTraffic).
Published 11 March 2026 Contents
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