4.3 Ocean Marine Clauses & Averages

Key Takeaways

  • Hull coverage insures the vessel; cargo coverage insures goods; freight coverage protects freight earnings; P&I addresses marine liability.
  • The running-down clause covers specified collision liability of the insured vessel, subject to the clause and limits.
  • Particular average is a partial loss borne by the affected interest, while general average is intentionally shared among voyage interests.
  • A general-average contribution can be owed even when the contributing cargo itself was not physically damaged.
Last updated: September 2026

Ocean Marine: Interests, Liability, and Average

Ocean marine has its own vocabulary because a voyage involves several property and liability interests. The vessel owner, cargo owners, charterer, and freight interest can suffer different losses from the same casualty.

Four principal interests

  1. Hull insurance covers physical damage to the vessel and specified machinery or equipment.
  2. Cargo insurance covers goods in ocean transit, often from warehouse to warehouse under stated attachment and termination rules.
  3. Freight insurance protects freight charges or expected freight earnings at risk.
  4. Protection and Indemnity (P&I) covers specified maritime liabilities not handled by the hull form.

P&I can address liability for crew or passenger injury, damage to docks or other property, pollution, removal of wreck, and cargo liability, depending on the contract. It is liability coverage, not a promise to repair the insured vessel.

Collision and the running-down clause

A hull policy’s collision liability or running-down clause covers a stated portion of the insured vessel owner’s legal liability for collision damage to another vessel and often property aboard it. P&I can fill portions or categories not covered by the hull collision clause. The exact allocation depends on policy language.

Example: Vessel A negligently strikes Vessel B. Hull coverage on Vessel A addresses A’s own covered physical damage. The running-down clause addresses specified liability for damage to B. P&I may address covered injury or property liabilities outside the collision clause. One collision activates different interests.

The meaning of average

In ocean marine, average means partial loss, not a mathematical mean.

Particular average

A particular average is a partial loss affecting a particular insured interest and borne by that interest or its insurer, subject to coverage and deductible. Seawater damages only one owner’s cargo during ordinary heavy weather; that loss does not become a voyage-wide contribution merely because other cargo was aboard.

General average

General average arises when an extraordinary and intentional sacrifice or expense is reasonably made for the common safety of the maritime adventure in the face of a real peril. The saved vessel, cargo, and freight interests contribute proportionally.

Classic examples include intentionally jettisoning cargo to refloat or stabilize a vessel, or incurring extraordinary port-of-refuge expense to preserve the voyage. The elements are:

  • a common maritime peril;
  • a voluntary and intentional sacrifice or extraordinary expenditure;
  • reasonableness;
  • purpose of preserving the common venture;
  • successful preservation of contributing value.

If those elements exist, a cargo owner whose goods arrived undamaged can still owe a contribution because the common sacrifice preserved that cargo.

General-average process

After a declaration, an average adjuster collects security from cargo interests, determines contributory values, classifies allowed sacrifices and expenses, and prepares an adjustment. Cargo insurers may issue a general-average guarantee. Without security, cargo delivery can be delayed.

Suppose cargo worth $200,000 is sacrificed to save a vessel and remaining cargo with a combined arrived value of $1,800,000. Ignoring other interests and expenses for illustration, the $200,000 allowed general-average loss is allocated over $1,800,000 of saved value according to the applicable adjustment. Each saved cargo interest contributes its proportion. This is contribution for common safety, not liability based on negligence.

Cargo perils and exclusions

Cargo forms can use named perils or broader “all risks” wording subject to exclusions. Frequent issues include seaworthiness, improper packing, inherent vice, delay, ordinary leakage or loss in weight, war, strikes, and temperature variation. “All risks” still requires fortuitous physical loss and does not cover every commercial disappointment.

Exam framework

Ask first which interest is involved. Damage to the insured ship points to hull. Legal liability to another vessel points to collision liability. Crew or dock liability points toward P&I. Damage to one shipment is particular average. An intentional sacrifice for the common safety points to general average.

Do not confuse general average with coinsurance. General average allocates a maritime sacrifice among voyage interests; coinsurance penalizes inadequate insurance to value under a property policy.

Work an ocean-marine problem from interest to voyage

Start by identifying the insured interest: hull, cargo, freight, or liability. Then determine the voyage or policy period, valuation, covered causes, exclusions, and applicable clauses. A cargo owner and vessel owner can suffer from the same storm but rely on different policies. Bills of lading, commercial invoices, packing lists, survey reports, stowage records, and notices to carriers help establish the shipment, condition, and chain of custody.

Particular average is a partial loss borne by the owner of the damaged interest, subject to insurance. General average is a maritime loss-sharing principle: an extraordinary and voluntary sacrifice or expenditure made for the common safety is apportioned among interests that benefit. A jettison used to save vessel and cargo is the classic illustration. Sue-and-labor addresses reasonable measures to avert or minimize covered loss; it is not permission to improve cargo or recover ordinary operating costs. Barratry concerns wrongful acts of master or crew against the owner’s interest. Free-of-particular-average wording historically narrows partial-loss recovery subject to its language. On the exam, classify the clause by function instead of assuming every maritime expense is a general-average contribution.

Test Your Knowledge

Cargo is intentionally jettisoned to save a vessel and the remaining cargo. What doctrine is most directly involved?

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D
Test Your Knowledge

What does ocean marine P&I principally insure?

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C
D