MyYachtsInsurance - Yacht Insurance Community

Reviewed by Alex Short, Independent Yacht Insurance Risk Analyst

TL;DR

A marine casualty is an incident causing vessel damage, loss, or injury, typically covered under hull and machinery policies if accidental and not excluded by clauses like the faulty workmanship clause or care, custody, and control provisions. Coverage triggers when the casualty results from navigational errors or external forces, excluding losses from improper maintenance or non-compliance with SOLAS Chapter II-1 Regulation 19 [SOLAS-CH2-REG19] or IACS Unified Requirement A2 [IACS-UR-A2].

Trigger Conditions

Trigger	Policy Impact	Consequence
Hot work without approval	Violation of fire prevention clauses	Coverage excluded if loss results from fire during unauthorized hot work [NFPA-51B-2024]
Refit/lay-up not notified within 14 days	Breach of care, custody, and control provisions	Coverage void if refit or lay-up commenced without insurer notification [ICOMIA-REFIT-STD-2021]
Navigation limits breached	Exclusion under hull and machinery policy for non-compliant operations	Losses excluded if casualty occurs in unauthorized waters [LR-RULES-2024-PT1-CH2]
Contractor assumes custody	Breach of custody clause	Coverage void if vessel is transferred to third-party custody without underwriter consent [ISM-CODE-SEC9]
Survey overdue	Non-compliance with class and statutory requirements	Coverage void if casualty occurs while vessel is out of compliance [SOLAS-CH2-REG19]

Underwriter's Checklist

Survey reports: Underwriters verify the vessel’s structural integrity, condition, and valuation to assess risk exposure and determine insurability, particularly for past or potential marine casualties [LR-RULES-2024-PT1-CH2] [BV-NR500-2024-PT2-CH6].
Class certificates and status: Underwriters confirm the vessel is in good standing with its classification society and complies with relevant standards, including structural and safety requirements [IACS-UR-A2] [DNV-RU-SHIP-PT1-CH3].
Maintenance logs: Underwriters review logs for evidence of regular and proper maintenance of fire-fighting systems and other safety equipment, ensuring compliance with SOLAS and FSS Code [IMO-FSS-CODE-CH7] [SOLAS-CH2-REG19].
Refit/modification records: Underwriters assess whether any refits or modifications were carried out in accordance with ICOMIA standards and class rules to ensure no compromise in safety or seaworthiness [ICOMIA-REFIT-STD-2021] [LR-RULES-2024-PT1-CH2].
Crew qualifications: Underwriters verify that the crew is properly trained and certified in emergency procedures, including fire-fighting and casualty response, in line with ISM Code requirements [ISM-CODE-SEC9] [IMO-MSC-CIRC-1321].
Navigation area endorsements: Underwriters confirm the vessel is operating within its certified navigation area to ensure compliance with environmental and safety regulations [SOLAS-CH2-REG19] [DNV-RU-SHIP-PT1-CH3].
Loss history declarations: Underwriters analyze past casualty claims to evaluate the vessel’s risk profile and potential for future incidents [MCA-MGN-280] [LR-RULES-2024-PT1-CH2].
Hot work permits and records: Underwriters review hot work documentation to ensure compliance with fire prevention standards during welding and cutting operations [NFPA-51B-2024] [AWS-D36M-2017] [OSHA-1915-SUBPART-D].
Fire protection system certifications: Underwriters check that fire protection systems are certified and maintained in accordance with ABS and NFPA guidelines [ABS-GUIDE-HOTWORK-2023] [NFPA-303].
Emergency response plans: Underwriters evaluate the vessel’s emergency response and casualty management plans to ensure alignment with international and flag state requirements [ISM-CODE-SEC9] [IMO-MSC-CIRC-1321].

Policy Wording Traps

Clause Type	Trap Mechanism	Scenario	Coverage Result
Care, Custody, and Control	Failure to maintain control during hot work operations	A vessel owner allows a contractor to perform welding without proper fire watches in place, violating NFPA 51B [NFPA-51B-2024] and OSHA 1915 [OSHA-1915-SUBPART-D]	Claim denied due to breach of duty under care, custody, and control
Contractors' Exclusion	Subcontractor negligence during refit	A refit contractor causes a fire due to improper ECDIS installation, violating ICOMIA Refit Standard [ICOMIA-REFIT-STD-2021]	Policy excludes coverage for contractor-caused damage
Consequential Damage	Water ingress from firefighting systems	A fire in the engine room triggers water-spraying systems under IMO FSS Code [IMO-FSS-CODE-CH7], causing electrical short circuits	Consequential damage excluded under policy terms
Latent Defect Carve-Out	Underwater weld failure due to poor technique	A hull breach occurs from a latent defect in an underwater weld not compliant with AWS D3.6M [AWS-D36M-2017]	Claim denied as damage stems from a latent defect
Material Change Warranty	Unauthorized structural modification	A vessel owner modifies the hull without approval, violating IACS UR A2 [IACS-UR-A2] and DNV Rules [DNV-RU-SHIP-PT1-CH3]	Policy void due to breach of material change warranty

Operational Reality

Yard operators frequently conduct hot work without ensuring full compliance with fire prevention protocols, particularly during refit operations, which is a common source of marine casualties [ICOMIA-REFIT-STD-2021]. This behavior often results in inadequate fire watch coverage and failure to secure adjacent flammable materials, increasing the risk of onboard fires. Documentation requirements include a completed hot work permit, fire watch log, and a risk assessment, all of which must be submitted to the class society and underwriter prior to commencing work [NFPA-51B-2024]. Surveyors are typically involved during the pre-hot work inspection and may require a post-work review if there is any deviation from the approved plan. Failure to secure proper documentation can lead to claims being denied or delayed, particularly if the casualty is traced back to non-compliance with fire safety standards [IMO-FSS-CODE-CH7]. Common mistakes include incomplete fire watch logs and failure to notify the underwriter within the policy notification period, which can result in coverage disputes. Class societies such as Lloyd's Register or Bureau Veritas may also impose additional survey requirements if a casualty occurs, prolonging the claims process and increasing liability for the owner.

Related Risks

Marine casualty involving fire in marina facilities → May trigger exclusions under fire protection standards such as NFPA 303 [NFPA-303], impacting coverage for third-party liability and property damage
Casualty arising from improper hot work operations → Could invoke exclusions related to OSHA 29 CFR 1915 Subpart D [OSHA-1915-SUBPART-D] and NFPA 51B [NFPA-51B-2024], affecting coverage for fire-related incidents and crew negligence
Casualty due to ECDIS failure during navigation → May implicate warranties under IMO MSC.1/Circ.1321 [IMO-MSC-CIRC-1321], potentially excluding claims if non-compliance with navigational equipment standards is established
Casualty involving underwater welding defects → Could trigger coverage limitations under AWS D3.6M:2017 [AWS-D36M-2017] and ABS Guidance Notes on Fire-Fighting Systems [ABS-GUIDE-HOTWORK-2023], impacting hull and machinery coverage for structural failure claims

Questions for Your Broker

Does the policy specify coverage limits for marine casualties involving fire hazards in marinas or boatyards, and does it align with the fire protection requirements outlined in [NFPA-303] and [IMO-FSS-CODE-CH7]?
Are underwater welding operations excluded from coverage under the policy, and does the wording reference compliance with [AWS-D36M-2017] and [NFPA-51B-2024] standards for hot work?
Does the policy require immediate notification of a casualty involving ECDIS system failure, and does it reference the operational guidance provided in [IMO-MSC-CIRC-1321] and [DNV-RU-SHIP-PT1-CH3]?
What documentation is required to substantiate a claim for damage to shipboard fittings, and does the policy reference compliance with [IACS-UR-A2] and [LR-RULES-2024-PT1-CH2] standards?
Does the policy trigger a deductible for casualties arising from refit operations, and does it reference the ICOMIA Superyacht Refit Standard [ICOMIA-REFIT-STD-2021] and [ABS-GUIDE-HOTWORK-2023] for operational compliance?
Does the policy require compliance with the ISM Code’s reporting obligations [ISM-CODE-SEC9] for marine casualties, and does it explicitly address warranty breaches under [SOLAS-CH2-REG19] and [MCA-MGN-280]?

References

SOLAS Chapter II-1 Regulation 19 (framework) — https://imorules.com/SOLAS_REGII-1.html
IACS Unified Requirement A2 (Shipboard Fittings) (framework) — https://ww2.eagle.org/content/dam/eagle/regulatory-news/2022/IACS-UR-A2.pdf
NFPA 51B: Fire Prevention During Welding, Cutting, and Hot Work (safety) — https://www.nfpa.org/codes-and-standards/nfpa-51b-standard-development/51b
ICOMIA Superyacht Refit Standard 2021 (other) — https://www.icomia.org/icomia-superyacht-refit-group-2025/
Lloyd's Register Rules the corresponding regulatory requirements Chapter 2 (class) — https://www.lr.org/en/knowledge/lloyds-register-rules/rules-and-regulations-for-the-classification-of-ships/
ISM Code the relevant section (Reports and Analysis) (framework) — https://www.classnk.or.jp/hp/pdf/activities/statutory/ism/ism_cd/ism-code-e.pdf
Bureau Veritas NR 500 the corresponding regulatory requirements Chapter 6 (class) — https://erules.veristar.com/dy/data/bv/pdf/500-NR_2024-10.pdf
DNV Rules for Ships the corresponding regulatory requirements Chapter 3 (class) — https://www.dnv.com/rules-standards/index.html
IMO FSS Code Chapter 7 (Water-Spraying Systems) (framework) — https://wwwcdn.imo.org/localresources/en/KnowledgeCentre/IndexofIMOResolutions/MSCResolutions/MSC.98(73).pdf
IMO MSC.1/Circ.1321 (ECDIS Guidance) (framework) — https://wwwcdn.imo.org/localresources/en/OurWork/Safety/Documents/ECDIS/MSC.1-Circ.1503-Rev.1.pdf
MCA Marine Guidance Note 280 (framework) — https://assets.publishing.service.gov.uk/media/5f23e4bbd3bf7f1b0a3a7f1e/MGN_280.pdf
AWS D3.6M:2017 Underwater Welding Code (manufacturer) — https://pubs.aws.org/Download_PDFS/D3.6M-2017PV.pdf
OSHA 29 CFR 1915 Subpart D (Welding, Cutting, Heating) (framework) — https://www.osha.gov/laws-regs/regulations/standardnumber/1915/1915SubpartD
ABS Guidance Notes on Fire-Fighting Systems (class) — https://ww2.eagle.org/en/rules-and-resources/rules-and-guides.html
NFPA 303: Fire Protection for Marinas and Boatyards (framework) — https://www.nfpa.org/codes-and-standards/nfpa-303-standard-development/303

Disclosure

This content is provided for informational purposes only and does not constitute insurance advice. Coverage terms vary by policy, jurisdiction, and underwriter. Consult a licensed marine insurance broker for guidance specific to your vessel and operations.

Marine Casualty Definition and Implications in Maritime Claims