Ocean Marine Insurance

Ocean marine insurance covers the risks of transporting goods and operating vessels over water. It is traditionally organized into four coverage parts: hull (physical damage to the ship or boat and its machinery), cargo (loss of or damage to goods while in transit by water), protection and indemnity (P&I) (the vessel owner's liability for bodily injury, crew claims, and damage to other property), and freight (the shipowner's loss of earnings when a voyage is interrupted). Together these respond to perils of the sea such as sinking, collision, stranding, heavy weather, and jettison.

Why it matters to a business: any company that imports, exports, or ships goods internationally by water has cargo exposure that domestic inland marine and cargo forms do not fully cover once goods leave land. Ocean cargo policies can be written per shipment or on an open (reporting) basis that automatically covers every shipment during the policy term, which is far more practical for a business with frequent overseas orders. Because ocean marine is written largely outside standard admitted forms, terms are highly negotiable, and buyers should understand the Institute Cargo Clauses that define whether coverage is all-risk or limited to named perils, and how care, custody, and control during loading and warehousing is handled.

A practical nuance unique to ocean marine is general average — an ancient maritime rule under which, when cargo is deliberately sacrificed or expenses are incurred to save a ship and its remaining cargo (for example, jettisoning containers in a storm), all cargo owners share the loss in proportion to the value saved. A business whose goods survive a casualty can still be billed a general-average contribution, sometimes a large one, before the cargo is released. Ocean cargo coverage typically pays the insured's general-average assessment, which is a key reason even shippers with low-value freight carry it. Buyers should also confirm subrogation handling and any war or strikes endorsements for high-risk routes.