14.3 Inland Marine and Nationwide Marine Definition

Origins and Scope

Inland marine insurance evolved from ocean marine when insurers extended coverage to cargo after it left the ship and moved inland over rail and road. Today it covers movable and floating property, domestic transit, and certain fixed structures tied to transportation or communication.

The distinguishing trait is mobility: inland marine follows the property wherever it goes rather than insuring a fixed building location. This makes it ideal for tools, equipment, fine art, and goods in transit.

The Nationwide Marine Definition (NMD)

The Nationwide Marine Definition (NMD) — first adopted in 1953 and revised in 1976 — is the industry agreement that defines which classes of property may be insured under marine (ocean and inland) policies. It lists six broad categories:

1. Imports and exports.
2. Domestic shipments (goods in transit within the country).
3. Instrumentalities of transportation and communication (bridges, tunnels, pipelines, towers, power lines).
4. Personal property floater risks.
5. Commercial property floater risks.
6. Property held by bailees.

The NMD keeps marine insurers from straying into ordinary fire or liability business.

Filed vs. Unfiled Classes

Inland marine classes fall into two groups:

Filed classes (such as commercial articles and contractors equipment) use standardized rates and forms. Unfiled classes (such as jewelers block or specialized exhibitions) are individually rated and may use manuscript wording, giving underwriters flexibility for unusual exposures.

Common Inland Marine Forms

• Commercial Articles Floater — cameras, musical instruments, and similar business property.
• Contractors Equipment Floater — mobile tools and machinery on job sites.
• Motor Truck Cargo — goods a trucker carries (for-hire or shipper's own).
• Bailee forms (Bailees Customer, Furriers, Cleaners) — covers customers' property in the insured's care, custody, or control.
• Accounts Receivable and Valuable Papers and Records — reconstruct lost financial and document records.

Most floaters are open-peril and often replacement cost, and they cover property at any location and in transit.

Worked Example — Contractors Equipment Floater

A contractor schedules a backhoe for $80,000 replacement cost on an open-peril Contractors Equipment Floater with a $1,000 deductible and an 80% coinsurance clause. Total scheduled equipment value is $100,000, but the contractor only insured to $70,000.

• Required limit = 80% of $100,000 = $80,000.
• Carried limit = $70,000, so coinsurance ratio = 70,000 / 80,000 = 0.875.
• On a $40,000 covered loss: $40,000 x 0.875 = $35,000, minus $1,000 deductible = $34,000 paid. The underinsurance triggers a penalty.

Block and Floater Policies

Two terms recur on the exam. A block policy is a comprehensive, all-risk inland marine policy covering a dealer's entire stock and exposures — for example, the Jewelers Block or Furriers Block — including property on premises, in transit, and in the custody of others. A floater is any policy that covers property that moves or floats from place to place rather than staying at one location.

Floaters generally provide open-peril coverage subject to named exclusions, and many use agreed value for scheduled high-value articles so no coinsurance applies to those items.

Transit and Transportation Forms

Goods moving over land create distinct exposures and forms:

• Transportation (Annual Transit) Floater — covers a shipper's own goods in transit by various conveyances.
• Motor Truck Cargo - Carriers — covers a for-hire trucker's legal liability for cargo it hauls.
• Motor Truck Cargo - Owners — covers a trucker's own goods in transit.

A carrier's form responds only when the trucker is legally liable, whereas an owner's form covers the goods directly. Distinguishing legal-liability coverage from direct property coverage is a classic transit-form exam point.

Instrumentalities of transportation and communication

One NMD category surprises candidates because it insures fixed property: instrumentalities of transportation and communication such as bridges, tunnels, pipelines, piers, wharves, dams, power-transmission lines, and radio/TV towers. These structures do not move, but they are tied to the movement of goods, people, or signals, so the NMD allows them under marine forms even though an ordinary building stays on property forms. Recognizing that a bridge or transmission tower is an inland-marine risk - while the office building beside it is a property risk - is a reliable exam distinction.

Bailee exposures and the care-custody bridge

Many inland-marine floaters exist to insure bailees - businesses holding customers' property, such as dry cleaners, furriers, repair shops, and warehouses. A bailee is legally responsible for reasonable care of others' goods, and the CGL excludes property in the insured's care, custody, or control, so a Bailee Customers form fills that exact gap by covering the customers' property on a broad basis, often regardless of the bailee's fault to preserve goodwill.

This parallels garagekeepers coverage in the auto trade and reinforces a unifying theme: whenever a business holds others' property, the standard liability policy's care/custody/control exclusion forces a specialized inland-marine or bailee solution.

Exam Tip: Inland marine follows movable property and transit; the NMD's six categories (including fixed instrumentalities and bailee property) define eligibility; carrier cargo forms pay on legal liability while owners forms cover goods directly.