Key Takeaways

  • Ocean marine is the OLDEST form of insurance—dating back to ancient maritime trade and Lloyd's of London in the 1600s
  • Four main coverages: HULL (the vessel), CARGO (goods shipped), FREIGHT (shipping charges), and P&I (liability)
  • PERILS OF THE SEA include storms, sinking, stranding, collision, and piracy—but NOT normal wear and tear or inherent vice
  • GENERAL AVERAGE requires all parties (ship owner, cargo owners) to share losses when cargo is jettisoned to save the vessel
  • The SUE AND LABOR clause requires the insured to take reasonable steps to minimize loss and the insurer pays those costs
Last updated: December 2025

Ocean Marine Insurance

The Oldest Form of Insurance

Ocean marine insurance is the oldest form of commercial insurance, dating back to ancient maritime trade. Lloyd's of London, established in the 1680s, began as a coffeehouse where merchants gathered to insure ships and cargo.

Quick Answer: Ocean marine covers vessels, cargo, and shipping-related liabilities for international maritime commerce. It includes four main coverages: hull (the ship), cargo (goods), freight (shipping charges), and P&I (liability).


The Four Main Ocean Marine Coverages

1. Hull Insurance

What It Covers: The vessel itself—the ship, boat, or barge.

Coverage ElementDetails
Hull and machineryShip's structure and equipment
Running down clauseLiability for collision with another vessel
Salvage chargesCost to save the vessel
General average contributionShip owner's share of sacrificed cargo

2. Cargo Insurance

What It Covers: Goods being shipped by sea.

  • Covers physical damage and loss to cargo
  • May be voyage-specific or open (blanket) policy
  • Values often declared per shipment
  • Covers from "warehouse to warehouse"

3. Freight Insurance

What It Covers: Shipping charges that would be lost if cargo doesn't arrive.

  • If cargo is lost, shipper loses the freight charges
  • Protects the shipper's revenue
  • Often combined with cargo coverage

4. Protection and Indemnity (P&I)

What It Covers: Maritime liability coverage.

P&I CoversExamples
Injury to crew membersSeaman injuries, Jones Act claims
Injury to passengersCruise ship accidents
Damage to docks/piersCollision with fixed objects
Pollution liabilityOil spills, environmental damage
Cargo liabilityDamage to cargo in carrier's care

Key Ocean Marine Concepts

Perils of the Sea

Covered Perils:

  • Storms and heavy weather
  • Sinking and stranding
  • Collision with other vessels
  • Piracy and theft
  • Fire and lightning
  • Jettison (throwing cargo overboard)

NOT Covered:

  • Normal wear and tear
  • Inherent vice (goods that spoil naturally)
  • Delay (unless specified)
  • War (requires separate coverage)

General Average

Definition: When cargo is voluntarily sacrificed to save the ship, ALL parties (ship owner and cargo owners) share the loss proportionally.

Example:

  • Ship in distress, some cargo thrown overboard to save the vessel
  • ALL cargo owners share the loss, not just those whose cargo was jettisoned
  • General average is calculated and apportioned by an average adjuster

Sue and Labor Clause

Requirement: The insured must take reasonable steps to minimize loss, and the insurer will pay those costs in addition to the claim.

Example:

  • Cargo ship runs aground
  • Insured hires salvage company to recover cargo
  • Sue and labor clause pays salvage costs beyond the coverage limit
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Test Your Knowledge

Under general average, what happens when cargo is jettisoned (thrown overboard) to save a ship?

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B
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D
Test Your Knowledge

Which ocean marine coverage protects against liability for oil spills, crew injuries, and damage to docks?

A
B
C
D