11.1 Inland Marine Insurance

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, radio/TV towers). Despite the word "marine," most inland marine risks never touch water. The line grew out of ocean marine cargo coverage: 17th- and 18th-century cargo policies ended when goods left the vessel, so a new "inland" extension was built to follow shipments overland to their final 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 test on the exam 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.

Why Inland Marine Looks Different from Commercial Property

Inland marine evolved with very few regulatory constraints, so forms are flexible and often manuscript (custom-written). The result is a coverage style that contrasts sharply with standard property 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.

Major Inland Marine Forms You Must 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) equipment licensed for road use, which belongs on a commercial auto policy.

Builders Risk

Covers structures under construction. The amount of insurance tracks the rising value of the project (the "completed value" or reporting form approach). Coverage typically ends at the earliest of: the structure being occupied, the policy expiring, or 90 days after construction is complete. It can extend to materials in transit and at temporary storage.

Electronic Data Processing (EDP) / Computer Coverage

Broader than standard property: insures hardware, media, and data/software restoration, plus extra expense to keep operating. Note that pure cyber-breach liability is handled by cyber policies (Section 11.6), not EDP property forms.

Bailee Forms

Cover property of customers in the insured's care, custody, or control — a furrier's storage floater or a processor's bailee form. The bailee is not the owner, but is legally responsible for the goods.

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.

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% coinsurance penalty to inland marine; most inland marine 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.

Bailee Liability and the Care, Custody, or Control Problem

A bailee is anyone who temporarily holds another person's property for a purpose — a jeweler resetting a stone, a dry cleaner, a furniture refinisher, a parking garage. The bailee is legally responsible for the goods while they are in its care but does not own them, so a standard property policy (which insures the named insured's own property) leaves a gap. Bailee customer floaters fill that gap by insuring the customers' property in the insured's possession, on premises and in transit, usually open-peril. A processor's policy may add coverage while goods are being worked on.

The exam tests the recognition that the bailee insures property it does not own because of the legal duty it owes to the owner.

Reporting Forms and Fluctuating Values

Many inland marine exposures have values that change daily — a warehouse distributor's stock in transit, or a builders risk project rising in value as work proceeds. Reporting forms address this: the insured periodically reports values (monthly is common), and premium is adjusted to actual exposure rather than a flat estimate. The trade-off is the 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 the function coinsurance serves in commercial property, but it operates through reporting accuracy rather than a fixed percentage clause, and it is a favorite exam contrast point.