Storm Force, No Propulsion, 115 Injured: What Spirit of Discovery Teaches Every Senior Officer About Heavy Weather Decisions

Bay of Biscay, 4 November 2023 — 12:30

Spirit of Discovery, a 58,119 gross tonne cruise vessel carrying 943 passengers and 503 crew, was crossing the Bay of Biscay in a Force 10 westerly with a long, heavy swell when its port propulsion pod shut down automatically and rotated 90° across the vessel’s heading.

The bridge team had not expected the rotation. Six minutes later, the starboard pod did the same. The vessel was now beam to the sea in hurricane-force conditions, pitching heavily and rolling violently. An announcement went out asking passengers to sit down and minimise movement.

In The Grand Dining Room, tables and chairs were already moving.

Within 20 minutes of losing propulsion, 115 passengers had been injured. The ship’s medical team of four were treating casualties across multiple public spaces without a triage system in place. The Mass Casualty Incident Plan existed. No one activated it.

One passenger, 85-year-old Trevor Gilks, fell from a high-backed chair when the vessel rolled to 10–13°. He reported severe neck and shoulder pain. A nurse arrived, examined him, and helped him stand. He was walked back to his chair. He was not placed on a spinal board.

He died on 8 November 2023, four days after the vessel docked in Portsmouth. His cause of death was recorded as complete cervical spine injury.

MAIB Report 6/2026 was published in March 2026. It found four failures that stacked to produce one death and 115 injuries, and it names each one precisely.

What the Investigation Found: Four Failures

1. A Passage Plan That Was Not Effectively Challenged

The story of how Spirit of Discovery came to be crossing the Bay of Biscay in those conditions is one of good intentions reversed under pressure.

The captain had shown early good judgement. In late October, he had discussed the weather forecast with Saga’s team ashore and agreed to cancel the Las Palmas port call, bringing the vessel into A Coruña early so that it could wait out the storm before sailing to Portsmouth. On 1 November, that plan was in place.

On 3 November, A Coruña announced its port would be closed — the forecast 6–9m wave height exceeded the pilot transfer limit. The captain discussed the change with Saga and the DPA, and agreed a direct passage to Portsmouth, crossing the Bay of Biscay. The weather routing service advised against the crossing. Table 3 in the MAIB report shows the alternative: a 12–24 hour delay would have allowed the storm to pass and the crossing to be made in significantly better conditions.

No officer on board formally challenged the revised plan. The DPA agreed it. The weather routing advice was logged but not acted upon. The MAIB’s finding is direct: the decision was not effectively challenged despite information available to the senior team that should have prompted a harder look.

2. A Propulsion Cascade the Crew Had Seen Before

Spirit of Discovery’s propulsion system — two Siemens SISHIP eSiPOD azimuth drives — had rated transient operating limits of +/- 22.5° of roll and +/- 7.5° of pitch. At 12:30, in conditions that were exceeding those limits, the port pod’s Water Leakage Stop (WLS) sequence alarm activated.

The Engineering Officer of the Watch advised the OOW that the WLS alarm was not a concern and could be acknowledged. Very shortly afterwards, the port pod’s propeller overspeed alarm activated. The pod automatically shut down, applied its shaft brake — and then rotated so that the propeller was oriented 90° inboard to the vessel’s heading. This last part was not expected by the bridge team. It had not been briefed as part of heavy weather preparations. It was not in the operating instructions the OOW had access to.

It had, however, happened before. In February 2023, Spirit of Discovery had experienced an identical propulsion overspeed sequence, including the 90° rotation. A non-conformance report had been raised. The technical issue had been reviewed. The cascade — specifically, that acknowledging the WLS alarm in the observed operating condition would lead to overspeed and pod rotation — had not been incorporated into the bridge team’s procedures, briefings, or operating instructions.

Nine months later, the same thing happened again. This time in Force 12 conditions with 943 passengers aboard.

3. A Mass Casualty Plan That Was Never Activated

115 passengers were injured in the first 20 minutes. The medical team of four — a doctor, a senior nurse, and two nurses — were treating casualties across multiple public spaces. Code Alpha medical emergency announcements were going out every few minutes. 23% of injured passengers later said the medical treatment they received was inadequate; they attributed this to the medical team being overwhelmed.

The Mass Casualty Incident Plan existed. Saga’s head of safety and policy assurance had emailed the senior leadership team the evening before, specifically suggesting they refresh themselves on the MCIP. It was not activated during the emergency.

The MAIB’s finding is precise: the MCIP was not implemented, and this contributed to the medical team becoming overstretched. A Mass Casualty Incident Plan is not bureaucracy — it is the structure that prevents a small, capable medical team from being paralysed by unstructured demand. Without it, triage does not happen, roles are not assigned, and the most critically injured patients are not necessarily seen first. That is what happened on Spirit of Discovery.

4. A Spinal Injury Managed Incorrectly for Four Hours

At 17:10, Trevor Gilks fell backwards from a high-backed chair when the vessel rolled to approximately 10–13°. The main impact was to his neck. A nurse arrived three minutes later, examined him, and — with crew assistance — helped him stand and return to the chair.

At 21:19, having been unable to move to the bathroom unassisted, he was taken to the medical centre in a wheelchair. His head had slumped forward, chin almost on his chest, and he was having difficulty breathing. The doctor fitted a neck collar.