14.3 Inland Marine and Nationwide Marine Definition

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, power lines, and radio/TV towers. Despite the word marine, most inland marine risks never touch water.

The line is historical. Seventeenth- and eighteenth-century ocean marine cargo policies ended when goods left the ship at the dock. As trade pushed inland by rail and wagon, marine underwriters extended cargo coverage to follow the goods overland - hence inland marine. Today the line covers everything from a contractor's backhoe to a museum's traveling exhibit to a jeweler's stock.

What unites inland marine risks is that they are mobile, in transit, or hard to value at a fixed location - exactly the property that standard fire/property forms handle poorly.

The line is sometimes called transportation insurance for this reason. A standard commercial property policy covers contents only at the described premises; the moment that property leaves the building - on a truck, at a job site, in a customer's hands - it needs inland marine. This off-premises and in-transit character is the recurring theme behind every inland marine form.

The Nationwide Marine Definition (NMD)

To stop marine underwriters from writing ordinary fixed-location fire business under the looser marine rules, the industry adopted the Nationwide Marine Definition (NMD), last revised in 1976. The NMD lists the classes of property that may be insured under marine (ocean or inland) forms. The six inland marine classes are:

1. Imports - goods in foreign trade, still in import status
2. Exports - goods being prepared for or in export
3. Domestic shipments - property in transit within the country
4. Instrumentalities of transportation and communication - bridges, tunnels, piers, pipelines, towers, etc.
5. Personal property floaters - personal articles that move with the owner
6. Commercial property floaters - business property of a mobile or specialized nature

The NMD is essentially a fence: if property fits one of these classes, it can be insured as inland marine; if it is just contents sitting at a fixed business location, it belongs in fire/property. Exam questions love to ask what the NMD does (defines eligible classes) and when it was last revised (1976).

Filed vs. Non-Filed and the Floater Concept

Much inland marine is non-filed (also called non-controlled), meaning the forms and rates are not filed with the state and are left to the insurer's judgment. This is why inland marine is flexible: an underwriter can tailor a manuscript form for an unusual risk. Some classes are filed/controlled (such as the personal articles floater and certain commercial forms) and use standardized rates.

A floater is a policy that follows the covered property wherever it goes, rather than covering it only at a stated location. Floaters are usually written on an open-perils (all-risk) basis and value scheduled items at agreed or actual cash value.

Coverage Triggers and Common Traps

Inland marine floaters are usually open-perils: covered unless excluded, so the burden falls on the insurer to prove an exclusion applies. Typical exclusions are wear and tear, inherent vice, insects/vermin, and (often) flood and earthquake unless added.

Worked valuation example - a Personal Articles Floater scheduling a $12,000 diamond ring on an agreed-value basis pays the full $12,000 if it is lost or stolen, with no deductible and no coinsurance, because scheduled floater items are valued at the agreed amount. Contrast this with unscheduled contents under a homeowners policy, which would be subject to a sublimit on jewelry (commonly $1,500 for theft) - a frequent trap on the exam.

Two more traps: (1) inland marine is not limited to maritime exposures - it mostly covers land-based mobile property; (2) the Nationwide Marine Definition does not insure anything itself - it merely defines which classes are eligible to be written as marine. Confusing the NMD for a coverage form is a common wrong answer.

A third trap concerns bailee coverage: a dry cleaner or repair shop holds customers' property, and a bailee form covers the bailee's liability for damage to that property regardless of fault in some forms. Do not confuse it with the shop's own contents coverage. The bailee form protects goods the insured does not own but has accepted into its care, custody, and control.

One more high-yield distinction: a trip transit policy covers a single specified shipment, while an annual transit or open cargo policy covers all shipments during the term on a reporting basis. Motor truck cargo, by contrast, is the carrier's liability coverage for goods of others it hauls. Matching the right transit form to whether the insured is the shipper, the owner, or the for-hire carrier is exactly the kind of scenario the exam builds questions around.