14.4 Ocean Marine Coverages (hull, cargo, freight, P&I)
Key Takeaways
- Ocean marine is one of the oldest insurance lines and is largely unregulated as to form and rate, so coverage is shaped by negotiated wordings and longstanding clauses.
- The four principal ocean marine coverages are hull (the vessel), cargo (the goods), freight (the revenue from carrying goods), and protection & indemnity (P&I) liability.
- Three implied warranties - seaworthiness, no deviation, and legal purpose - are unique to ocean marine and can void coverage if breached.
- Losses are classified as total (actual or constructive) or partial, and partial losses split into particular average (borne by one party) and general average (shared by all parties to the venture).
- Coverage perils descend from the historic 'perils of the sea' clause, expanded by the Inchmaree clause to cover certain machinery and negligence-related losses.
A largely unregulated, ancient line
Ocean marine insurance is the original form of insurance, predating fire and life coverage by centuries. In the United States it is largely exempt from form and rate regulation, so policies are built from negotiated wordings and traditional clauses (many traceable to the London market) rather than ISO-standard forms. Because the parties are commercial and sophisticated, the law allows great freedom of contract.
Ocean marine policies are typically written for an agreed (valued) amount, meaning the insured value is fixed in advance and paid at total loss without re-proving value - a practical necessity when a vessel or cargo is lost at sea and physical inspection is impossible.
The four principal coverages
| Coverage | Insures | Insured party |
|---|---|---|
| Hull | The vessel itself (and often its machinery) | Vessel owner |
| Cargo | The goods/property being transported | Shipper or consignee |
| Freight | The shipping revenue earned for carrying cargo | Carrier/shipowner |
| Protection & Indemnity (P&I) | Liability to third parties - injury, cargo damage, pollution, collision liability not covered by hull | Vessel owner/operator |
Hull covers physical loss to the ship. Cargo covers the goods. Freight protects the income a carrier loses if cargo is destroyed before delivery and the freight charge cannot be collected. P&I is the liability line of ocean marine - it fills the liability gaps hull coverage does not address, including bodily injury to crew and third parties and pollution exposure.
The three implied warranties
Ocean marine recognizes three implied warranties - promises read into the contract even if unwritten. Breach can void coverage:
- Seaworthiness - the vessel is fit for the voyage: properly built, equipped, crewed, and loaded.
- No deviation - the vessel will follow the customary or agreed route without unjustified departure. An unnecessary deviation suspends coverage.
- Legal purpose - the venture is lawful (no smuggling, no illegal cargo).
These warranties are unique to ocean marine and are frequent exam answers. Example: a captain takes a major shortcut off the customary route to save time and the ship is damaged - the no-deviation warranty is breached, potentially voiding coverage for that loss.
A cargo vessel departs on its insured voyage but the master, without necessity, takes a substantially different route to save fuel and the ship runs aground. Which implied ocean marine warranty has most likely been breached?
Classifying losses: total vs. partial
Ocean marine losses are first classified by severity:
- Actual total loss - the property is completely destroyed or irretrievably lost (the ship sinks).
- Constructive total loss - the property is not literally destroyed, but the cost to recover/repair exceeds its value, so it is treated as a total loss (an abandonment may be tendered).
- Partial loss - any loss less than total.
Partial losses then split into two crucial categories - particular average and general average - which is the most heavily tested ocean marine numeric topic.
Particular average vs. general average
- Particular average - a partial loss borne by one party (the owner of the damaged property or that property's insurer). Example: seawater damages one shipper's cargo only - that shipper alone bears the loss.
- General average - a partial loss voluntarily and reasonably incurred to save the entire venture, shared proportionally by all parties (ship, cargo owners, freight) in proportion to the value each had at risk. Classic example: cargo is deliberately jettisoned to refloat a grounded ship and save everyone.
Three conditions must exist for a general average sacrifice: the peril must be real and imminent, the sacrifice must be voluntary and intentional, and the act must be successful in saving at least part of the venture. The cost is then apportioned by value at risk.
Worked example: general average contribution
A ship runs aground. To refloat it, the crew jettisons $100,000 of one shipper's cargo (a general-average sacrifice). The values saved by the act are:
| Interest | Saved value | Share of total |
|---|---|---|
| Ship (hull) | $3,000,000 | 60% |
| Cargo (all owners) | $1,500,000 | 30% |
| Freight | $500,000 | 10% |
| Total at risk | $5,000,000 | 100% |
The $100,000 sacrifice is shared in proportion to value saved:
- Ship contributes 60% x $100,000 = $60,000
- Cargo contributes 30% x $100,000 = $30,000
- Freight contributes 10% x $100,000 = $10,000
Every party benefiting from the rescue contributes, so the shipper whose cargo was jettisoned does not bear the whole loss alone - the essence of general average.
Perils and the Inchmaree clause
The historic insuring language covers 'perils of the sea' - fortuitous accidents and casualties of navigable waters (storms, sinking, stranding, collision, jettison). Ordinary wear and tear and the natural action of wind and waves are not perils of the sea.
The Inchmaree clause (named after an 1887 court case involving the steamship Inchmaree) extends hull coverage to losses the basic perils clause excludes - bursting of boilers, breakage of shafts, latent defects in machinery or hull, and loss caused by the negligence of master, crew, or repairers. This clause is a common exam answer when a loss arises from machinery failure or crew negligence rather than a 'sea peril.'
To refloat a grounded ship, $100,000 of one shipper's cargo is jettisoned. The values saved are: ship $3,000,000, all cargo $1,500,000, freight $500,000 (total $5,000,000). Under general average, how much does the hull (ship) interest contribute?