14.4 Ocean Marine Coverages (Hull, Cargo, Freight, P&I)

Ocean Marine: The Oldest Insurance Line

Ocean marine insures the vessel, its cargo, the freight (revenue) earned for carriage, and the shipowner's legal liabilities arising from seagoing operations. It is the oldest branch of insurance, rooted in centuries of maritime trade, and remains largely non-filed / a-rated with heavy reliance on negotiated wording and London-market clauses. Four classic coverage segments make up an ocean marine program:

Quick Answer: Ocean marine has four pillars - hull (the vessel), cargo (the goods), freight (the shipping revenue), and protection and indemnity (the owner's liability).

Ocean marine policies are valued on an agreed/valued basis far more often than land lines: the vessel's hull value and cargo value are typically stipulated up front, so claims avoid depreciation disputes. Standard perils are framed as the 'perils of the sea' - heavy weather, stranding, sinking, collision - and modern forms expand on this with named additional perils.

Hull policies layer in specialized clauses. The running-down clause (RDC), also called the collision liability clause, extends hull to cover the insured vessel's liability for colliding with another ship, typically up to the hull value. The Inchmaree clause adds coverage for losses from latent defects in machinery, boiler bursts, and crew negligence that would otherwise fall outside 'perils of the sea.'

Sue and labor clauses reimburse the insured for reasonable expenses incurred to minimize a loss, and a deductible (franchise) may apply to partial losses. These named extensions are why hull wording is heavily negotiated rather than standardized.

Implied Warranties, Average, and Cargo Clauses

Ocean marine carries implied warranties that have no real counterpart in land lines, and the exam loves them:

• Seaworthiness - the vessel is fit for its intended voyage and properly crewed/equipped.
• No deviation - the vessel will not depart from the agreed or customary route without necessity.
• Legality - the venture is lawful.

Breach of an implied warranty can void coverage even without a causal link to the loss. Average is another marine-specific concept: an 'average' means a partial loss.

General average example: to refloat a grounded ship, the master jettisons $200,000 of one shipper's cargo, saving a venture worth $4,000,000. Under the York-Antwerp Rules, the $200,000 sacrifice is shared pro rata by every saved interest - the sacrificing shipper does not bear the loss alone. Cargo policies often use the London Institute Cargo Clauses (A, B, C): Clause A is broadest (all-risks), B is intermediate (named perils), and C is most restrictive.

A further wrinkle is the memorandum / franchise clause on cargo: small partial losses below a stated percentage are not paid unless the loss reaches a threshold, after which the full loss is paid. This differs from a straight deductible, which is always subtracted. Cargo can also be written 'warehouse-to-warehouse,' extending coverage from the shipper's premises, through ocean transit, to the consignee's warehouse — a transit-continuity feature that blurs into the inland-marine origins discussed in the prior section.

Protection & Indemnity and a Coinsurance Numeric

Protection & Indemnity (P&I) is the liability pillar. It responds to the shipowner's legal liabilities not covered under the basic hull running-down (collision) clause: injury or death of crew and passengers, illness, cargo damage liability, pollution, wreck removal, and damage to fixed objects like piers. P&I is historically provided by mutual P&I Clubs that pool members' exposures. The hull policy's collision (running-down) clause typically covers liability for striking another vessel, but P&I picks up the broader bodily injury and property liabilities.

Many cargo and hull policies use a marine coinsurance / average clause that penalizes under-insurance much like land coinsurance. Worked example: cargo is actually worth $1,000,000; the shipper insures it for only $800,000. A partial loss of $100,000 occurs. Under a marine average clause the recovery is prorated: ($800,000 / $1,000,000) x $100,000 = $80,000. The $20,000 shortfall is retained by the under-insured shipper.

Exam traps to lock in: (1) freight insures the revenue/income from carriage, not the cargo or the boat. (2) P&I is liability, not hull damage. (3) Implied warranties (seaworthiness, no deviation, legality) are unique to ocean marine. (4) General average is shared; particular average is not.

One last contrast ties the unit together: ocean marine and inland marine are siblings under the broad 'marine' heading, but they split at the water's edge. Goods on the high seas, the vessel, and the owner's seagoing liabilities are ocean marine; the same goods once they roll onto a domestic truck, plus bridges, towers, and bailee property, are inland marine governed by the Nationwide Marine Definition. Both lines favor agreed/valued settlement and broad open-perils wording, which is why they read so differently from the building-anchored property and packaged BOP forms covered earlier in this unit.