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Surveys, Casualty Reporting & Health and Safety

MAIB reporting · Official Log Book · Statutory surveys · Classification · Improvement notices · Risk assessment · SOLAS training manual

7 lessonsabout 9 min reading1 visuals and tools10 scenario questions3 oral questions

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Lesson 1 of 7 · 2 min

MAIB — Marine Accident Investigation Branch

The MAIB investigates marine accidents involving UK-flagged vessels or accidents in UK waters involving any vessel. The Merchant Shipping (Accident Reporting and Investigation) Regulations 2026 set out the reporting requirements. They came into force on 15 May 2026 and replaced the 2012 Regulations; the MAIB's guidance is MGN 564 (Amendment 2).

Accident CategoryExamplesNotification Timeline
Very Serious Marine CasualtyTotal loss of the ship, a death, severe damage to the environmentAs soon as possible, by the quickest means available — phone the MAIB 24-hour line
Marine CasualtySerious injury, person lost overboard, material damage, collision or grounding with damage, ship unfit to proceed, breakdown needing a towAs soon as possible, by the quickest means available
Marine IncidentNear-miss collision, loss of steering in a fairwayAs soon as possible, by the quickest means available

See it

MAIB: classify, then notify

Classify the accident, then notify: every category goes to the MAIB as soon as possible, by the quickest means available.

Accident— then notify the MAIB:

  1. As soon as possible

    by the quickest means available

    • Very Serious Marine Casualty
    • Marine Casualty
    • Marine Incident

Very Serious Marine Casualty

Definition
A marine casualty involving the total loss of the ship, a death, or severe damage to the environment
Examples
Total loss of the ship, a death, severe damage to the environment
Notification timeline
As soon as possible, by the quickest means available — phone the MAIB 24-hour line

How to notify

The master (or, if the master has not survived, the senior surviving officer) and the owner — as soon as possible, by the quickest means available.

After a casualty

Preserve the evidence: charts, log books, recorded data and VDR data saved at once.

Do not disturb the scene until the MAIB investigator has attended, unless doing so is necessary:

  • to prevent a further casualty
  • to assist the injured
  • to prevent serious pollution

Failing to preserve evidence is an offence.

Very Serious Marine Casualty: As soon as possible, by the quickest means available — phone the MAIB 24-hour line.

Show

Schematic · Merchant Shipping (Accident Reporting and Investigation) Regulations 2026 and MGN 564 (Amendment 2) as given on the module sheet · check the current MAIB guidance

Say it out loud. Talk “Accident investigation aboard — preserving evidence” through with the live Tutor.

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Study aid built from primary sources. Verify regulations against the current editions before your oral. An official result needs an MCA assessment.