9.2 Ocean Marine: Hull, Cargo, Freight, Protection & Indemnity (P&I) & General Average

Key Takeaways

  • Ocean marine insurance is organized around four fundamental coverages: Hull Insurance (physical damage to the vessel and Running Down Clause), Cargo Insurance (shipped goods), Freight Insurance (carrier revenue), and Protection & Indemnity (maritime liability).
  • A Particular Average loss is a partial loss borne solely by the specific owner of the damaged interest and their insurer, whereas a General Average loss involves a voluntary sacrifice or extraordinary expenditure for the common safety of the entire venture, with all saved interests contributing pro-rata.
  • Protection & Indemnity (P&I) insurance covers the shipowner's legal liabilities, including Jones Act bodily injury claims for crew members, passenger injuries, cargo damage caused by negligence, damage to fixed piers and docks, and environmental pollution.
  • Ocean marine contracts rest on three strict implied warranties: the vessel is seaworthy, the venture is legal, and the vessel will not deviate from its agreed route without justification.
Last updated: September 2026

Ocean Marine: Hull, Cargo, Freight, Protection & Indemnity (P&I) & General Average

Exam Focus: The New York Series 17-70 examination emphasizes the four core ocean marine coverages, the allocation of maritime losses between Particular Average and General Average, the three strict implied warranties, and the comprehensive liability protections of Protection & Indemnity (P&I) insurance, including Jones Act maritime employee claims.


Foundations of Ocean Marine Insurance

Ocean marine insurance protects vessels, cargo, freight revenue, and maritime liabilities against the hazards of navigation on international waters and open oceans. Perils insured include sea storms, collision, stranding, fire, jettison, barratry (fraudulent or unlawful acts committed by the shipmaster or mariners to the injury of the shipowner), and piracy.

Marine contracts require the highest degree of good faith (uberrimae fidei). Ocean marine policies are historically written on an agreed-value or valued policy basis, establishing the insurable value of vessels and specialty cargo at the inception of the contract to prevent valuation disputes following a total loss at sea.


The Four Primary Ocean Marine Coverages

Maritime commerce involves distinct economic interests, giving rise to four specialized ocean marine coverage forms:

1. Hull Insurance

Hull Insurance protects the shipowner against physical loss or damage to the vessel itself, including the ship's hull, superstructure, permanent propulsion machinery, boilers, electrical systems, and bunker fuel. Policies are generally written on a valued basis.

  • Collision / Running Down Clause (RDC): Hull policies contain a specialized liability provision known as the Running Down Clause. The RDC indemnifies the shipowner if the insured vessel collides with another ship and becomes legally liable for physical damage to the other vessel and its cargo. Traditionally, the clause provides coverage up to the agreed hull value (4/4ths RDC) or three-fourths of that value (3/4ths RDC), with the remaining liability absorbed by Protection & Indemnity.

2. Cargo Insurance

Cargo Insurance protects the owner of the goods (the shipper or consignee) against loss or damage to merchandise transported across open waters. Cargo insurance forms include:

  • Voyage Policy: Insures a specific shipment of cargo for a single designated transit from port of origin to port of destination.
  • Open Cargo Policy: A continuous, open-ended policy that automatically attaches to all shipments made by or to the insured merchant. Premiums are paid periodically based on declared invoice values, ensuring uninterrupted commercial coverage.
  • Warehouse-to-Warehouse Clause: Extends cargo coverage beyond the ocean voyage itself. It attaches when goods leave the shipper's inland warehouse, continues through overland transit, dock handling, and ocean transit, and remains in effect until goods are delivered to the consignee's warehouse at the final destination, or after 15 or 30 days following discharge at the destination port.

3. Freight Insurance

In maritime commerce, freight does not refer to the cargo itself; rather, it represents the monetary compensation or earnings paid to the vessel owner or charterer for transporting cargo to its agreed destination. Under common maritime law, if cargo is destroyed or lost prior to arrival, the carrier may forfeit its right to collect freight charges. Freight insurance protects the carrier against the loss of anticipated or earned freight revenue if an insured maritime peril prevents the vessel from completing the voyage.

4. Protection and Indemnity (P&I)

Protection and Indemnity (P&I) insurance is comprehensive marine liability insurance, typically provided through specialized mutual associations called P&I Clubs or commercial marine underwriters. Hull insurance with its Running Down Clause covers only property damage to other vessels resulting from collisions. P&I covers virtually all other maritime liabilities incurred by the shipowner, including:

  • Crew Injury & Death: Liability for bodily injury, illness, or death of crew members under federal maritime law, including the Jones Act (46 U.S.C. § 30104), claims for maintenance and cure, and maritime unseaworthiness claims.
  • Passenger Liability: Injury or death suffered by ship passengers and maritime visitors.
  • Damage to Fixed Structures: Liability for striking docks, wharves, piers, buoys, bridges, and submarine telecommunication cables (damage excluded by Hull RDC).
  • Cargo Liability: Shipowner's legal liability for loss of or damage to customer cargo caused by improper handling, stowage, or carriage negligence, subject to the Carriage of Goods by Sea Act (COGSA).
  • Pollution & Environmental Liabilities: Strict statutory liability for marine oil spills and environmental damage under the federal Oil Pollution Act of 1990 (OPA 90) and international conventions, along with mandatory wreck removal expenses.
CoverageInsured InterestPrimary Covered Perils & Scope
Hull InsuranceShipownerPhysical loss/damage to ship structure, machinery, and fuel; includes Running Down Clause
Cargo InsuranceShipper / ConsigneePhysical damage to merchandise; includes Warehouse-to-Warehouse inland transit protection
Freight InsuranceCarrier / ShipownerLoss of earned transportation revenue caused by non-completion of voyage
P&I InsuranceShipowner / OperatorThird-party maritime liabilities: Jones Act crew injuries, dock damage, cargo fault, and oil spills

Marine Losses and Averages: Particular vs. General Average

In maritime law, the term average signifies a financial loss or damage suffered during a maritime adventure. Maritime losses are classified as either Particular Average or General Average:

Particular Average

A Particular Average is a partial loss sustained by one specific, individual interest (such as a single cargo owner or the shipowner alone) resulting from an accidental maritime peril. The financial burden of a particular average loss is borne exclusively by the party that owns the damaged property and that party's insurer.

  • Example: During a severe storm, sea water enters cargo hold number two, destroying 200 crates of electronics owned by Merchant A. The cargo in hold number one, owned by Merchant B, remains undamaged, and the vessel is unharmed. Merchant A's loss is a Particular Average. Neither Merchant B nor the shipowner contributes to offset Merchant A's loss.

General Average

A General Average is a voluntary, intentional, and reasonable sacrifice of ship or cargo, or an extraordinary expenditure incurred by the shipmaster in a moment of imminent peril, for the purpose of preserving the common maritime venture from total destruction. When a valid general average act occurs, all participating interests that were saved (the shipowner, the cargo owners, and the freight interest) must contribute pro-rata based on their saved net values to reimburse the party whose property was sacrificed.

Three legal prerequisites must exist to constitute a General Average:

  1. Imminent Common Peril: A real and pressing maritime peril threatening the common safety of the vessel, cargo, and crew.
  2. Voluntary Sacrifice or Extraordinary Expenditure: A deliberate, intentional sacrifice ordered by the master (e.g., jettisoning heavy cargo to refloat a grounded vessel, or intentionally running a burning ship aground to extinguish a fire) or an extraordinary expenditure (e.g., hiring commercial salvage tugs).
  3. Successful Preservation: The sacrifice must achieve success; at least a portion of the vessel and other cargo interests must be safely preserved.

The Jason Clause: Under statutory maritime law, cargo owners historically argued that if a shipmaster's negligent navigation created the peril, cargo interests were exempt from contributing to a general average. Modern ocean marine bills of lading and policies include a Jason Clause (originating from the landmark 1912 Supreme Court decision The Jason), which provides that cargo owners must contribute in general average even if the peril resulted from negligence in the navigation or management of the vessel, provided the shipowner exercised due diligence to make the vessel seaworthy at the start of the voyage.


Implied Warranties in Ocean Marine Contracts

Unlike ordinary commercial insurance contracts, where policy conditions must be explicitly stated in the written policy, ocean marine law enforces three strict implied warranties. These warranties are legally implied into every ocean marine contract, whether written on the policy document or not. A breach of any implied warranty voids coverage from inception, discharging the insurer from liability:

  1. Seaworthiness: The shipowner warrants that at the commencement of the voyage, the vessel is structurally sound, properly equipped, adequately supplied, fueled, and manned by a licensed, competent master and crew capable of withstanding the ordinary perils of the planned journey.
  2. Legality of the Venture: The policyholder warrants that the voyage is lawful in every respect under the laws of the vessel's flag nation and destination countries. An enterprise involving illegal smuggling, trading with prohibited belligerents, or contraband voids the insurance contract entirely.
  3. No Deviation: The vessel warrants that it will proceed directly along the customary and agreed geographical route between designated ports without unreasonable delay, detours, or unauthorized departures. An unjustified deviation terminates coverage immediately, except when made to save human life, assist a vessel in distress, or avoid an unavoidable imminent peril such as a hurricane.
Test Your Knowledge

A container ship runs hard aground on a sandbar during a severe storm. To prevent the vessel from breaking apart and losing the entire ship and cargo, the shipmaster orders the intentional jettison of 150 cargo containers, lightening the ship and allowing it to safely reach port. How is the financial loss of the jettisoned cargo distributed under maritime law?

A
B
C
D
Test Your Knowledge

A commercial cargo vessel strikes a municipal concrete pier while maneuvering to dock, causing severe structural damage to the pier. At the same time, two crew members sustain severe bodily injuries. Which ocean marine insurance coverage protects the shipowner against these liability claims?

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B
C
D
Test Your Knowledge

Which of the following is an implied warranty strictly enforced by maritime law in every ocean marine insurance policy?

A
B
C
D