14.3 Inland Marine and Nationwide Marine Definition
Key Takeaways
- Inland marine insures movable property, property in transit, and instrumentalities of transportation/communication; the test for classification is mobility or transit, not the peril
- The Nationwide Marine Definition (NMD), last revised 1976 and filed via the NAIC, lists the classes that may be written as marine - imports/exports, domestic shipments, instrumentalities, and personal/commercial floaters and bailee coverage
- Inland marine forms are typically open-peril, valued/agreed-amount, with little or no coinsurance and broad territory, and are often non-filed (manuscript)
- Common forms include contractors equipment, builders risk, EDP, bailee, motor truck cargo, accounts receivable, and valuable papers floaters
- A valued floater pays the agreed amount on total loss regardless of disputed ACV, a frequently tested contrast with ACV property settlements
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 fixed boiler bolted to a building is commercial property.
The Nationwide Marine Definition (NMD)
Filed by the National Association of Insurance Commissioners 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 (dry cleaners, repair shops) |
The NMD is the legal boundary of the line. If a class is not listed, it cannot be written as marine.
Why Inland Marine Looks Different from Commercial Property
Inland marine evolved with few regulatory constraints, so forms are flexible and often manuscript (custom-written). The result contrasts sharply with standard property forms.
| Feature | Inland Marine | Standard 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: Some inland marine forms (e.g., personal articles floaters) are filed with the state. Large commercial classes are often non-filed, letting the underwriter craft terms and rates per risk.
Common Forms and a Worked Numeric
Frequently tested inland marine forms include:
- Contractors Equipment Floater - mobile tools and equipment at sites and in transit.
- Builders Risk - structures under construction, often completed value rated.
- Electronic Data Processing (EDP) / Computer coverage.
- Bailee forms - property of customers in the insured's care (dry cleaners, repair shops).
- Motor Truck Cargo and Transit policies.
- Accounts Receivable and Valuable Papers and Records floaters.
Worked numeric (valued vs. ACV): A fine-arts floater is written on a valued (agreed amount) basis at $80,000 for a sculpture. The piece is destroyed; current ACV is argued to be $62,000. Because the floater is valued, the insurer pays the agreed $80,000, not the disputed ACV. Contrast a property policy: ACV settlement would reflect depreciation and could pay only $62,000. The valued basis removes that fight - a classic exam contrast.
Trap: Inland marine is not automatically coinsurance-free for every form, but the heavily tested floaters (jewelry, fine arts, contractors equipment) typically carry no coinsurance, unlike commercial property.
Origins and the Nationwide Marine Definition
Inland marine insurance evolved from ocean marine to cover property in transit over land and movable or instrumentality-of-transportation property. To set the boundary between inland marine and property/fire policies, the industry adopted the Nationwide Marine Definition (NMD), which lists the classes eligible for inland marine: domestic shipments (transit), instrumentalities of transportation and communication (bridges, tunnels, pipelines, radio towers), personal property floaters, and commercial property floaters.
If a risk fits an NMD class, it can be written inland marine; the NMD is the gatekeeping concept the exam tests.
Common Inland Marine Floaters
Inland marine is dominated by floaters - policies covering property that moves or is hard to insure on a fixed-location form. Personal lines floaters include the Personal Articles Floater (scheduled jewelry, furs, fine arts, cameras, silverware - open perils, often no deductible, agreed value or ACV) and the broader Personal Property Floater.
Commercial floaters include the Contractors Equipment Floater (mobile tools and machinery), Motor Truck Cargo (a carrier's liability for others' goods), Bailee forms (a dry cleaner's or repair shop's liability for customers' property), Installation Floater, Builders Risk, and Accounts Receivable / Valuable Papers coverage.
Transit Coverage and Bailee Exposures
Transportation/transit coverage answers who insures goods on the move. A shipper can buy transit coverage on its own goods; a common carrier carries motor truck cargo liability for the goods of others it hauls; and bailees (those holding others' property for service) buy bailee customers coverage to protect property in their care.
The exam often presents a bailment - a furrier storing customers' coats, a jeweler repairing a watch - and asks which inland marine form responds; the answer is a bailee form because the property belongs to customers but is in the insured's care, custody, and control, which the standard property and CGL forms exclude.
A landscaping company's wood chipper is damaged when it overturns while being towed between two private job sites. The unit is not licensed for road use and is scheduled on a contractors equipment floater written open-peril. How does coverage respond?
A gallery's $80,000 sculpture is scheduled on a valued (agreed amount) fine-arts floater. The piece is destroyed and the insurer argues its actual cash value is only $62,000. How is the loss settled?