14.3 Inland Marine and Nationwide Marine Definition
Key Takeaways
- Inland marine covers movable property, property in transit, and instrumentalities of transportation/communication; the controlling test is mobility or transit, not the peril.
- The Nationwide Marine Definition (NAIC, last major revision 1976) sets the six classes a company may write as marine; writing fixed property as inland marine to dodge coinsurance violates it.
- Inland marine is usually open-peril, written on valued/agreed-amount terms, with little or no coinsurance and a broad floating territory.
- Common forms include contractors equipment and builders risk, installation, EDP/computer, bailee, motor truck cargo, and valuable-papers floaters; filed vs. non-filed forms set rating freedom.
- The over-water boundary separates inland from ocean marine; the mobility/transit boundary separates inland marine from commercial property.
What Inland Marine Actually Insures
Inland marine insurance covers property that moves, property in transit, and the instrumentalities of transportation and communication - bridges, tunnels, piers, pipelines, 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 their destination.
Quick Answer: If property is mobile, in transit, or hard to fix to one address, it is usually an inland marine risk - not a commercial property risk.
The defining exam test is mobility or transit, not the type of peril. A $400,000 crane sitting on a job site is inland marine (a contractors equipment floater); the same value in a boiler bolted to a building is commercial property.
The Nationwide Marine Definition (NMD)
Filed through the NAIC and last substantially revised in 1976, the Nationwide Marine Definition lists the classes a company may write as inland (or ocean) marine. Underwriters must keep risks inside these classes; writing fixed-location, non-transit property as "inland marine" to dodge coinsurance is a regulatory violation.
| NMD Class | Typical 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 |
The NMD recognizes six broad classes. On the exam, knowing that bridges and towers (instrumentalities) qualify - even though they never move - is a classic catch.
A contractor wants to insure a $400,000 mobile crane that travels among job sites, and a competitor proposes writing the company's fixed-location warehouse stock as inland marine to avoid coinsurance. Which statement is correct?
Filed vs. Non-Filed and Common Forms
Inland marine evolved with few regulatory constraints, so forms are flexible. Filed (controlled) forms have rates/forms filed with the state and follow rating bureaus; non-filed (uncontrolled, manuscript) forms give underwriters freedom to custom-write coverage, terms, and price.
| Form | What it covers |
|---|---|
| Contractors equipment floater | Mobile tools/machinery on or between job sites |
| Builders risk | Structures under construction (transit/installation included) |
| Installation floater | Equipment/materials until installed and accepted |
| EDP / computer floater | Hardware, software, media; open-peril, broad |
| Bailee form | Customers' property in the insured's care (dry cleaners, repair shops) |
| Motor truck cargo | Goods a carrier hauls for others |
| Accounts receivable / valuable papers | Records hard to reconstruct |
Inland marine is usually open-peril (all-risk), written on valued or agreed-amount terms, with little or no coinsurance and a broad territory. That open-peril, low-coinsurance, agreed-value profile is exactly what separates it from commercial property in exam stems.
Transit Coverages and Boundaries
Goods on the move are insured by transit forms. A transportation/transit policy or motor truck cargo form covers the shipper's or carrier's interest while goods travel by land. A trip transit policy covers a single named shipment.
Key boundaries the exam tests:
- Inland marine vs. ocean marine - the over-water boundary. Cargo on the high seas is ocean marine; once it lands and moves overland, inland marine takes over (warehouse-to-warehouse cargo terms blur this, but the rule remains the water line).
- Inland marine vs. commercial property - the mobility/transit boundary, as above.
- Floaters "float" with the property wherever it goes within the policy territory, unlike commercial property tied to a described location.
A worked agreed-value example: a fine-arts floater scheduling a painting at an agreed value of $250,000 pays the full $250,000 on a total loss with no coinsurance test and no ACV depreciation - the agreed-value clause waives the usual proof-of-value fight.
Two distinctions deserve memorization. Scheduled versus blanket writing: a scheduled floater lists each item with its own limit (ideal for high-value, identifiable property like jewelry or fine art), while a blanket floater covers a class of property under a single limit (ideal for fluctuating inventories of tools). Filed versus non-filed again drives flexibility: non-filed commercial inland marine lets the underwriter manuscript terms, set agreed values, and price freely, which is why floaters can carry broader perils and lower coinsurance than a comparable commercial property form.
Expect a stem that rewards the candidate who recognizes that a jeweler's stock in transit, a surveyor's instruments, and a sign company's billboards all belong in inland marine, not commercial property.
Which feature most clearly distinguishes a typical inland marine floater from a commercial property policy on the licensing exam?