14.4 Ocean Marine Coverages (Hull, Cargo, Freight, P&I)

The Oldest Insurance Line

Ocean marine insurance predates fire and life insurance by centuries. The modern market traces to Edward Lloyd's coffeehouse in London in the 1680s, where shipowners and merchants found underwriters willing to subscribe to portions of a voyage's risk - the origin of today's Lloyd's of London.

Quick Answer: Ocean marine insures vessels, cargo, shipping revenue, and maritime liability for over-water commerce, organized into four coverages: hull, cargo, freight, and protection & indemnity.

Unlike most P&C lines, ocean marine is governed heavily by admiralty (maritime) law and long-settled doctrines such as average and sue-and-labor. The exam rewards knowing these doctrines, not just the coverage names. Ocean marine forms are largely non-filed/manuscript - underwriters set their own terms and rates.

The Four Core Coverages

The running-down clause (RDC) within hull coverage pays the insured's liability for collision damage to another vessel. Standard hull collision often pays only a portion of such liability, so P&I is bought to fill the gaps - covering bodily injury to crew under the Jones Act, third-party property, pollution, and removal of wreck.

Perils of the Sea and Exclusions

Perils of the sea are the fortuitous accidents of navigation: storm, heavy weather, sinking, stranding (running aground), collision, and jettison (throwing cargo overboard to lighten a vessel in peril). They do not include ordinary action of wind and waves a vessel should withstand.

Standard exclusions:

• Inherent vice - the natural tendency of goods to deteriorate (fruit rotting, metal rusting)
• Ordinary wear and tear and gradual deterioration
• Delay and consequential loss of market
• War, strikes, riots, and civil commotion - covered only by separate War Risk / SR&CC endorsements

Cargo is frequently written All Risks (Institute Cargo Clauses A) or on named-perils clauses; the exam expects you to know inherent vice and delay are never covered without specific add-ons.

Average Doctrines and Sue and Labor

Average in marine insurance means partial loss.

• Particular average - a partial loss borne solely by the owner of the lost/damaged property (e.g., one shipper's water-damaged crates).
• General average - when property is voluntarily sacrificed (e.g., cargo jettisoned) or expense incurred for the common safety of the entire venture, all parties share the cost proportionally to the value saved.

Worked General-Average Example

A vessel and cargo together are worth $10,000,000. To save the ship in a storm, $1,000,000 of one merchant's cargo is jettisoned. Each interest contributes pro rata to the $1,000,000 sacrifice:

• Sacrifice rate = $1,000,000 / $10,000,000 = 10% of saved value
• A cargo owner whose saved goods are worth $2,000,000 contributes 10% x $2,000,000 = $200,000

The Sue and Labor clause requires the insured to take reasonable steps to minimize a loss; the insurer reimburses those expenses in addition to the policy limit. Implied warranties of seaworthiness and legality of venture are strictly enforced - breach can void coverage.

Implied Warranties in Detail

Ocean marine recognizes implied warranties that exist even if unwritten, a sharper standard than ordinary property conditions:

• Seaworthiness - the vessel must be reasonably fit for the voyage (sound hull, adequate crew, proper equipment).
• Legality - the venture must be lawful; smuggling or contraband voids coverage.
• No deviation - the vessel must follow the customary route without unjustified detour or delay.

Breach of an implied warranty can void coverage from the point of breach, even without a causal link to the loss - a rule far stricter than land-based policy conditions, and a favorite exam contrast.

Coverage Triggers and Valuation

Cargo is most often valued (agreed value) - the policy states an amount (commonly invoice cost plus freight plus a markup such as 10%), avoiding actual-cash-value disputes after a loss. Hull is also typically written valued. Cargo can be insured per voyage or under an open cargo policy that automatically covers all shipments as they sail, with the insured reporting values periodically.

Worked Particular-Average Example

A cargo of machinery is valued at $500,000. Saltwater intrusion during a storm damages $80,000 of it, with no voluntary sacrifice and no franchise/deductible breach issue. Because the loss is accidental and affects only this owner's goods, it is particular average - the insurer pays the $80,000 partial loss to that owner alone, and no other interest in the venture contributes.

The Four Ocean Marine Coverages

Ocean marine policies are assembled from four coverages, and the exam expects you to match each to what it protects:

Implied Warranties

Ocean marine uniquely imposes implied warranties the insured must satisfy even if unwritten:

• Seaworthiness — the vessel must be fit for the voyage.
• No deviation — the vessel must not depart from the agreed route without necessity.
• Legality — the venture must be lawful.

Breaching an implied warranty can void coverage, a strict standard the exam draws from this line's centuries-old roots.

Average Clauses: Particular vs. General

Ocean marine uses the term "average" to mean loss. Particular average is a partial loss borne by the owner of the damaged property alone. General average is a partial loss voluntarily and reasonably incurred to save the entire venture (jettisoning cargo in a storm), and it is shared proportionally by all parties whose property was saved — vessel, cargo, and freight owners alike.

Worked scenario: To refloat a grounded ship, the captain jettisons $200,000 of one shipper's cargo; the saved venture is worth $2,000,000. Under general average, every interest contributes its share of the $200,000 sacrifice in proportion to its saved value, so the burdened shipper does not bear the loss alone. The exam tests the particular-versus-general average distinction because it is unique to marine insurance and frequently misread.