14.4 Ocean Marine Coverages (hull, cargo, freight, P&I)
Key Takeaways
- Ocean marine is the oldest commercial insurance line, tracing to Edward Lloyd's London coffeehouse in the 1680s, and is governed heavily by admiralty (maritime) law.
- Four core coverages: Hull (the vessel), Cargo (goods at sea), Freight (the shipping revenue), and Protection & Indemnity / P&I (maritime liability).
- Perils of the sea include storm, sinking, stranding, collision, and jettison; inherent vice, ordinary wear, and delay are excluded, and war requires separate coverage.
- General average forces all parties to share proportionally when property is voluntarily sacrificed for the common safety; particular average is an accidental partial loss borne by the owner alone.
- The Sue and Labor clause pays loss-mitigation costs in addition to the limit, and the Jones Act routes injured-crew claims into P&I rather than workers compensation.
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.
The Four Core Coverages
| Coverage | What it insures | Key clause/detail |
|---|---|---|
| Hull | The vessel, machinery, equipment | Running-down (collision liability) clause |
| Cargo | Goods shipped by sea | Often warehouse-to-warehouse |
| Freight | Shipping revenue lost if cargo never arrives | Protects the carrier's/shipper's income |
| Protection & Indemnity (P&I) | Maritime liability | Crew injury (Jones Act), pollution, dock damage |
The running-down clause (RDC) inside hull coverage pays the insured vessel owner's liability for collision with another vessel - a liability item carried inside a property coverage, which surprises candidates. Broader liabilities (crew, passengers, pollution, fixed objects such as piers) fall to P&I.
Perils of the Sea and Exclusions
Perils of the sea means fortuitous, accidental dangers - not every peril encountered on the sea.
| Covered (perils of the sea) | Excluded |
|---|---|
| Storm, heavy weather, sinking | Ordinary wear and tear |
| Stranding, grounding | Inherent vice (cargo that self-spoils) |
| Collision, jettison | Delay (even if a peril caused it) |
| Fire, lightning, piracy | War, strikes, riots (separate coverage) |
Inherent vice - fruit that rots, steel that naturally rusts in humid holds - is a classic excluded trap: the cargo's own nature, not a sea peril, caused the loss.
Average: General vs. Particular
In marine law, average means a partial loss. Two kinds appear constantly on the exam.
General Average
When property is voluntarily and reasonably sacrificed for the common safety of the whole venture, all parties - shipowner and every cargo owner - share the loss proportionally to the value saved.
Example: A fire threatens a freighter. The captain orders 200 of 1,000 containers jettisoned to save the ship and remaining cargo. Under general average all cargo owners and the shipowner contribute pro rata, so the owners of the dumped containers are reimbursed by everyone who benefited.
Particular Average
A partial loss that is accidental and falls only on the owner of the damaged property - no sharing. Seawater spoils one shipper's cargo in a storm; that shipper alone bears it.
| Doctrine | Trigger | Who pays |
|---|---|---|
| General average | Voluntary sacrifice for common safety | All parties, pro rata |
| Particular average | Accidental partial loss | Owner of the lost property alone |
The Sue and Labor Clause
The Sue and Labor clause requires the insured to take reasonable steps to prevent or minimize an insured loss, and the insurer reimburses those expenses in addition to the policy limit.
Example: A grounded ship's insured pays $300,000 to a salvage firm to refloat the vessel and recover cargo. Even if the loss already approaches the limit, those sue-and-labor costs are paid additionally, encouraging salvage effort near the limit.
Cargo Clauses and Valuation
Ocean cargo coverage uses standardized Institute Cargo Clauses (historically A, B, and C). Clause A is the broadest open-peril form; B and C are progressively narrower named-peril forms. Cargo policies typically attach warehouse-to-warehouse, covering the inland legs at each end, not merely the time afloat. The Free of Particular Average (FPA) clause pays a partial loss only if it results from a major peril such as stranding, sinking, burning, or collision. Cargo is usually written valued (agreed amount), paying the stated value without depreciation.
Implied Warranties and the Jones Act
Marine policies impose strict implied warranties - breach can void coverage even without causation: seaworthiness, legality, and no deviation from the customary route. Separately, under the Jones Act an injured seaman may sue the vessel owner for negligence; these claims fall to P&I, not workers compensation, because seamen are excluded from most state WC systems.
Common Exam Traps
- General vs. particular average is the single most-tested distinction: general = shared, particular = owner alone.
- P&I vs. hull collision: the hull running-down clause covers vessel-to-vessel collision liability; P&I covers crew, passengers, pollution, and fixed objects.
- Sue and Labor pays extra, over and above the limit.
- Jones Act crew injury routes to P&I, not workers comp.
Ocean Marine Coverages, Clauses, and Worked Traps
Ocean marine insures the risks of waterborne commerce and is built from four core coverages: Hull (physical damage to the vessel), Cargo (goods being shipped), Freight (the shipowner's loss of expected freight revenue), and Protection & Indemnity (P&I) — the marine equivalent of liability, covering injury to crew/others and damage the vessel causes.
| Coverage | Insures |
|---|---|
| Hull | Physical loss/damage to the vessel |
| Cargo | Goods in transit by water |
| Freight | Lost freight charges/revenue |
| P&I | Liability for BI/PD and crew injuries |
Ocean marine relies on doctrines unique to maritime law. General Average requires all parties (ship, cargo owners, freight) to proportionally share a sacrifice voluntarily made to save the whole venture, while Particular Average is a partial loss borne by the owner of the lost property alone. Coverage is often written with "warranties" (e.g., trading limits, seaworthiness) whose breach can void coverage, and frequently on an "all risks" basis subject to named exclusions.
Worked General Average scenario: A ship jettisons $200,000 of one shipper's cargo to lighten the vessel during a storm, saving a venture worth $4,000,000. Under General Average, the $200,000 sacrifice is apportioned among all interests in proportion to their saved values, so the unlucky shipper recovers most of its loss from the others (and their ocean cargo insurers). This sharing principle, and the hull/cargo/freight/P&I split, are the most tested ocean-marine concepts.
To save a burning vessel, the captain deliberately orders part of the cargo jettisoned. Under marine law, how is this loss allocated?
A merchant seaman is injured aboard ship and sues the vessel owner for negligence. Which ocean marine coverage responds, and why is workers compensation not the source?