14.3 Inland Marine and Nationwide Marine Definition

Key Takeaways

  • Inland marine evolved from ocean marine; the Nationwide Marine Definition lists eligible classes built around mobility, transit, and instruments of transportation/communication.
  • Eligible classes include imports/exports, domestic shipments, instrumentalities (bridges, pipelines, towers), and personal/commercial property floaters.
  • Forms split into filed (standardized: accounts receivable, valuable papers, contractors equipment) and non-filed (specialized: jewelers block, bailee, manuscript).
  • Most inland marine is open-perils with broad territory and often replacement cost; carriers use Motor Truck Cargo while owners use transit policies.
  • Permanently fixed buildings are ordinary property, not inland marine.
Last updated: June 2026

Origins and the Nationwide Marine Definition

Inland marine grew out of ocean marine when insurers extended coverage to goods carried over land ("inland") as part of a shipment. Because marine insurers wanted clear boundaries on what they could write, the industry adopted the Nationwide Marine Definition (originally 1933, revised 1953 and 1976), a regulatory description of property eligible for ocean and inland marine policies.

The Nationwide Marine Definition broadly lists eligible classes:

  1. Imports and exports (ocean marine connection)
  2. Domestic shipments (goods in transit)
  3. Instrumentalities of transportation and communication — bridges, tunnels, piers, pipelines, power/phone lines, radio/TV towers (fixed but transit-related)
  4. Personal property floaters (mobile personal property)
  5. Commercial property floaters (mobile/specialized business property)

The unifying theme tested on the exam is mobility or transit — inland marine covers property that moves, is held by a bailee, or is an instrument of transportation/communication. Property permanently fixed at one location (an ordinary building) belongs in property forms, not inland marine.

Filed vs. Non-Filed Forms and Common Coverages

Inland marine divides into two regulatory buckets:

  • Filed (controlled) classes: ISO standardized forms whose rates/forms are filed with the state. Examples: accounts receivable, valuable papers and records, signs, contractors equipment, equipment dealers, commercial articles, camera/musical instrument dealers, physicians and surgeons equipment.
  • Non-filed (uncontrolled) classes: large/specialized risks individually rated and tailored, such as bailee customers, jewelers block, builders risk (when written inland marine), and transit/motor truck cargo on a manuscript basis.

Most inland marine is written open-perils with broad transit and worldwide-type territory, and frequently on a replacement cost basis for newer property.

High-Yield Inland Marine Forms

FormWhat it covers
Accounts ReceivableLoss when records of amounts owed are destroyed and cannot be collected
Valuable Papers & RecordsCost to research/reconstruct destroyed documents (not currency)
Contractors Equipment FloaterMobile tools/equipment at job sites and in transit
Bailee Customers (Bailees Customers)Customer property in the insured's care (cleaners, repairers)
Jewelers BlockStock and customer goods of a jeweler
Transportation/Motor Truck CargoGoods a carrier hauls for others
Personal Articles Floater (PAF)Scheduled personal valuables (jewelry, furs, fine art)

Transit Coverage and a Worked Loss

For goods in transit, two structures are tested. The owner of cargo can buy a Transportation/Trip Transit or Annual Transit policy; the carrier buys Motor Truck Cargo (Carriers form) to cover its legal liability for customers' goods. A common carrier is generally liable for cargo as a near-insurer subject to limited common-law defenses (act of God, public enemy, inherent vice, fault of shipper, public authority).

A contractor's equipment floater insures a $60,000 excavator on an open-perils, replacement-cost basis with a $2,500 deductible. The excavator is vandalized at a job site, with $18,000 in repair cost.

  • Open perils includes vandalism (not excluded), so the loss is covered.
  • Payable = $18,000 repair - $2,500 deductible = $15,500.
  • Because RC applies and the unit is repairable, no depreciation is taken.

Contrast that with a scheduled personal articles floater, where each item carries its own agreed value and typically has no deductible, paying the lesser of repair, replacement, or the scheduled amount.

Bailee Exposures, Builders Risk, and Floater Mechanics

A bailee is someone who has temporary lawful possession of another's property - dry cleaners, repair shops, processors, warehouses. Bailees customers coverage protects the bailee against liability (and often goodwill) for damage to customer goods in its care, even when the bailee is not legally at fault, which is why it is broader than relying on negligence liability alone.

Builders risk is frequently tested as a crossover: it can be written either on a commercial property form (CP 00 20 Builders Risk) or as an inland marine course-of-construction form. It covers a structure while under construction, including materials, fixtures, and supplies on site, in transit, or at a temporary storage location. Coverage typically ends at the earliest of acceptance, occupancy, or a stated number of days after completion.

Floater Valuation and Pair-or-Set

Scheduled floaters such as the Personal Articles Floater can be written agreed value (insurer pays the scheduled amount for a total loss, no depreciation) or actual cash value. A key trap is the pair-or-set clause: when one item of a matched pair or set is lost, the insurer may pay the difference between the value of the set before and after the loss - it does not automatically pay the full set value or force the insured to surrender the remaining piece.

Coverage Territory

Inland marine territory is broad - frequently the United States, its territories, and Canada, and many transit/floater forms extend worldwide. This wide territory and open-perils breadth are why mobile, high-value property is steered into inland marine instead of standard commercial property forms tied to a fixed premises.

Test Your Knowledge

Which property is LEAST likely to qualify under the Nationwide Marine Definition for inland marine coverage?

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B
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D
Test Your Knowledge

A trucking company hauls a manufacturer's goods and wants coverage for its legal liability if the cargo is damaged in transit. Which form fits?

A
B
C
D

Filed vs. Non-Filed and the 'Floater' Concept

Inland marine divides into filed classes (rates/forms filed with the state — e.g., commercial articles, signs, accounts receivable, valuable papers) and non-filed classes (custom-written for unusual exposures). Coverage is typically written on a floater that follows movable property wherever it goes, on an open-peril basis, with little or no coinsurance.

Classic forms: Contractors Equipment floater, Installation floater, Bailee's Customers form, Jewelers/Furriers Block, Transit/Motor Truck Cargo, and Electronic Data Processing. The unifying theme — and the Nationwide Marine Definition test — is property that is mobile, in transit, or instrumental to communication/transportation, distinguishing inland marine from fixed-location commercial property.