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, 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 created to follow shipments overland to their destination.

Quick Answer: If property is mobile, in transit, or hard to fix to a single address, it is usually an inland marine risk - not a commercial property risk.

The defining test is mobility or transit, not the kind of peril. A $400,000 crane on a job site is inland marine (a contractors equipment floater); the same value bolted into a building as a fixed boiler is commercial property.

The Nationwide Marine Definition (NMD)

The Nationwide Marine Definition, last substantially revised in 1976, 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 marine to dodge coinsurance is a regulatory violation.

Why Inland Marine Differs from Commercial Property

Inland marine evolved with few regulatory constraints, so forms are flexible and often manuscript (custom-written).

Filed vs. non-filed: Some inland marine forms (such as personal articles floaters) are filed with the state, while large commercial classes are often non-filed, letting the underwriter craft terms and rates per risk.

Major Inland Marine Forms to Know

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 any equipment licensed for road use, which belongs on a commercial auto policy.

Builders Risk

Covers structures under construction, with the amount of insurance tracking the rising project value (the completed-value or reporting approach). Coverage typically ends at the earliest of occupancy, policy expiration, or 90 days after construction is complete, and can extend to materials in transit and at temporary storage.

Electronic Data Processing (EDP) / Computer Coverage

Broader than standard property: it insures hardware, media, and data/software restoration, plus extra expense to keep operating. Pure cyber-breach liability belongs on a cyber policy, not the EDP property form.

Bailee Customer Forms

A bailee temporarily holds another person's property for a purpose - a jeweler resetting a stone, a dry cleaner, a furniture refinisher. The bailee is legally responsible for the goods but does not own them, so its own property policy leaves a gap that bailee floaters fill.

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 exposures have values that change daily - a distributor's stock in transit, or a builders risk project rising in value. Reporting forms address this: the insured periodically reports values (monthly is common) and premium is adjusted to actual exposure.

Honesty penalty: If the insured under-reports values at the last report before a loss, recovery is limited to the proportion the reported value bears to the actual value. This mirrors what coinsurance does in commercial property, but works through reporting accuracy rather than a fixed percentage.

Worked Example

A paving contractor insures a $250,000 asphalt roller on a contractors equipment floater. The roller tips into a ditch while being driven between two job sites on a private haul road. Because the floater is open-peril and the loss is not wear or mechanical breakdown, the upset is covered. Had the roller 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 apply an 80% penalty to inland marine; most carries no coinsurance.
• Marine means water: it does not - the transit/mobility connection is the test.
• Builders risk end date: coverage stops at occupancy/completion, not at the next renewal.
• Auto vs. floater: road-licensed vehicles travel on auto policies; off-road mobile equipment travels on the floater.

Inland Marine, the Nationwide Marine Definition, and Floaters

Inland marine insurance grew from ocean marine to cover property in transit over land and movable property, and its scope is fixed by the Nationwide Marine Definition (NMD), which lists the classes eligible for inland marine: domestic shipments/transportation, instrumentalities of transportation/communication (bridges, tunnels, pipelines, radio towers), and various floaters for personal and commercial movable property.

Inland marine forms are valued for open-peril, worldwide, no-coinsurance coverage that ordinary property forms lack. The Personal Articles Floater (PAF) schedules high-value personal items (jewelry, furs, fine art, cameras) and even covers mysterious disappearance, which homeowners base forms exclude.

Worked scenario: A contractor's $40,000 excavator is damaged at a job site. A commercial property form won't follow the equipment off-premises, but a Contractors Equipment floater (inland marine) pays open-peril, anywhere the equipment travels, with no coinsurance penalty. Personal-lines trap: A traveler loses a scheduled $12,000 diamond ring (simply misplaced). The homeowners base form excludes mysterious disappearance and caps jewelry theft at ~$1,500; a Personal Articles Floater pays the full $12,000, illustrating why inland marine floaters are the answer when property is movable, high-value, or carried worldwide.