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🚢 '''Hull and machinery insurance''' is a [[Definition:Marine insurance | marine insurance]] coverage that protects the physical hull, machinery, and equipment of a vessel against loss or damage arising from maritime perils such as collision, grounding, fire, explosion, heavy weather, and other navigational hazards. One of the oldest and most foundational forms of insurance — with roots tracing back to the marine insurance practices of medieval Mediterranean traders and the early [[Definition:Lloyd's of London | Lloyd's]] coffee house — hull and machinery (H&M) coverage remains the cornerstone of any shipowner's or operator's insurance program. The coverage applies to the vessel's structure, main propulsion engines, auxiliary machinery, and permanently installed equipment, and it can be written on either a named-perils or all-risks basis depending on the policy form used.

⚙️ Several widely recognized standard policy forms govern H&M insurance across different markets. The Institute Time Clauses — Hulls (ITC-Hulls) developed by the Institute of London Underwriters, along with the newer International Hull Clauses (IHC) and the Nordic Plan maintained by the Nordic Association of Marine Insurers, each establish the scope of covered perils, exclusions, [[Definition:Deductible | deductible]] structures, and claims settlement procedures. H&M policies are typically written on a time basis (usually 12 months) and valued at an agreed amount representing the vessel's insured value, which serves as the limit for [[Definition:Total loss | total]] and [[Definition:Constructive total loss | constructive total loss]] claims. Partial losses — hull damage requiring dry-docking and repair, machinery breakdown, or damage sustained in a collision — are settled on an indemnity basis subject to a deductible. The [[Definition:Collision liability | running-down clause]] (or collision liability clause) is a distinctive feature that extends coverage to the insured's legal liability arising from collisions with other vessels, typically up to three-quarters or the full insured value depending on the policy form, with the balance covered by the shipowner's [[Definition:Protection and indemnity insurance (P&I) | protection and indemnity (P&I)]] club.

⚓ Hull and machinery insurance occupies a central position in the global shipping economy, underpinning vessel finance, trade, and regulatory compliance. Classification societies such as Lloyd's Register, DNV, and Bureau Veritas play a critical role in the H&M [[Definition:Underwriting | underwriting]] process: their surveys and class maintenance records provide underwriters with essential data on a vessel's structural integrity and maintenance standards. [[Definition:Premium | Premiums]] are influenced by vessel type, age, flag state, trading area, claims history, and the owner's overall fleet management quality. The market for H&M insurance is genuinely global, with significant capacity provided by London, the Nordic countries, China, Japan, Singapore, and the Middle East. For [[Definition:Reinsurance | reinsurers]], marine hull portfolios can generate large individual claims — particularly from groundings of large tankers or containership engine failures — making [[Definition:Facultative reinsurance | facultative]] and [[Definition:Treaty reinsurance | treaty]] reinsurance essential tools for managing peak exposures.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Marine insurance]]
* [[Definition:Hull all-risks insurance]]
* [[Definition:Protection and indemnity insurance (P&I)]]
* [[Definition:Total loss]]
* [[Definition:Collision liability]]
* [[Definition:Institute cargo clauses]]
{{Div col end}}

Definition:Hull and machinery insurance - Revision history

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