14.3 Inland Marine and Nationwide Marine Definition
Key Takeaways
- Inland marine insures movable property, property in transit, and the instrumentalities of transportation and communication; the defining test is mobility or transit, not the type of peril.
- The Nationwide Marine Definition (last substantially revised 1976) lists the classes insurers may write as inland or ocean marine, keeping fixed-location property out of the line.
- Inland marine is typically open-peril, written on valued or agreed-amount terms, with little or no coinsurance and broad territory.
- Key forms include contractors equipment floaters, builders risk, EDP/computer coverage, bailee forms, and transit/motor truck cargo policies.
- Builders risk ends at the earliest of occupancy, policy expiration, or about 90 days after construction is complete - not at the next renewal.
What Inland Marine Insures
Inland marine insurance covers property that moves, property in transit, and the instrumentalities of transportation and communication - bridges, tunnels, piers, pipelines, and radio/TV towers. Despite the word "marine," most inland marine risks never touch water. The line grew out of ocean marine cargo coverage: early cargo policies ended when goods left the vessel, so an "inland" extension was built to follow shipments overland to the final destination.
The defining test is mobility or transit, not the type of peril. A $400,000 crane on a job site is inland marine (a contractors equipment floater); the same $400,000 in a boiler bolted to a building is commercial property.
The Nationwide Marine Definition (NMD)
Developed through the National Association of Insurance Commissioners (NAIC) and last substantially revised in 1976, the Nationwide Marine Definition (NMD) lists the classes a company may write as inland or ocean marine. Writing fixed-location, non-transit property as "inland marine" to dodge coinsurance is a regulatory violation.
| NMD Class | Examples |
|---|---|
| Imports / Exports | Goods entering or leaving the country |
| Domestic shipments | Goods in transit between U.S. points |
| Instrumentalities of transportation/communication | Bridges, tunnels, piers, pipelines, towers |
| Personal property floaters | Jewelry, fur, fine arts, camera floaters |
| Commercial property floaters | Contractors equipment, mobile medical gear |
| Bailee coverage | Property of others in your care (dry cleaners, repair shops) |
Inland Marine vs. Standard Commercial Property
| Feature | Inland Marine | Commercial Property |
|---|---|---|
| Coverage basis | Usually open-peril (all-risk) | Often basic/broad named perils |
| Valuation | Frequently valued / agreed amount | ACV or replacement cost |
| Coinsurance | Typically none | Commonly 80% or 90% |
| Territory | Broad, sometimes worldwide | Described premises only |
| Forms | Filed or non-filed (manuscript) | Standardized ISO forms |
Filed vs. non-filed: Personal articles floaters are typically filed with the state; large commercial classes are often non-filed (manuscript), letting the underwriter craft terms and rates per risk.
Bailee Liability and the Care, Custody, or Control Problem
A bailee is anyone who temporarily holds another's property for a purpose - a jeweler resetting a stone, a parking garage, a furniture refinisher. The bailee is legally responsible for the goods while in its care but does not own them, so a standard property policy (which insures the named insured's own property) leaves a gap. Bailee customer floaters fill it by insuring customers' property in the insured's possession, on premises and in transit, usually open-peril. The exam tests the recognition that the bailee insures property it does not own because of the legal duty it owes the owner.
Major Inland Marine Forms
Contractors Equipment Floater
Covers mobile equipment - bulldozers, cranes, compressors, hand tools - at job sites and in transit, written open-peril. It excludes ordinary wear, mechanical breakdown, and usually equipment licensed for public-road use, which belongs on a business auto policy.
Builders Risk
Covers structures under construction, with the amount of insurance tracking the project's rising completed value (often via a reporting approach). Coverage ends at the earliest of occupancy, policy expiration, or about 90 days after construction is complete - not at the next renewal.
Electronic Data Processing (EDP) / Computer Coverage
Insures hardware, media, and data/software restoration plus extra expense. Pure cyber-breach liability sits on a separate cyber policy, not the EDP property form.
Bailee Forms
Cover property of others in the insured's care, custody, or control - a furrier's storage floater, a dry cleaner, a repair shop. The bailee does not own the goods but is legally responsible for them, so the standard property policy (which insures the insured's own property) leaves a gap the bailee form fills.
Transit / Motor Truck Cargo
Insures goods in shipment. A motor truck cargo policy covers a carrier's liability for others' freight; a shipper's policy covers the owner's own goods.
Reporting Forms and Fluctuating Values
Many inland marine values change daily. Reporting forms let the insured periodically report values (monthly is common) so premium tracks actual exposure. The trade-off is the honesty penalty: under-reporting at the last report before a loss limits recovery to the proportion the reported value bears to the actual value - the inland marine analog to coinsurance.
Worked Example
A paving contractor schedules a $250,000 asphalt roller on an open-peril contractors equipment floater with no coinsurance. The roller tips into a ditch while driven on a private haul road between two job sites. Because the floater is open-peril and the loss is neither wear nor mechanical breakdown, the $250,000 upset loss is covered in full (less any deductible). Had it been damaged while licensed and traveling a public highway under its own power, the business auto policy - not the floater - would respond.
Common Exam Traps
- Coinsurance reflex - candidates wrongly apply an 80% penalty; most inland marine carries no coinsurance.
- "Marine means water" - it does not; the transit/mobility connection is the test.
- Builders risk end date - stops at occupancy/completion, not at renewal.
- Auto vs. floater - road-licensed vehicles travel on auto policies; off-road mobile equipment on the floater.
Which document defines the classes of property that insurers may write as inland marine?
A landscaping firm's wood chipper, not licensed for road use, overturns while being towed between two private job sites; it is scheduled on an open-peril contractors equipment floater. How does coverage respond?