The Overlooked Coverage Blind Spot: Why Standard War-Risk Policies May Leave Hormuz Shippers Unprotected

Three weeks into the Hormuz crisis, thousands of shippers have discovered a costly insurance blind spot. Their policies carry war-risk coverage. Their cargo damage is insured. Their rerouting costs are not.

The standard marine cargo insurance market divides war-related protection into two optional add-ons: Institute War clauses and Institute Strikes clauses. Most exporters and importers assume these provide comprehensive defense against conflict-driven losses. The market data tells a different story.

WHAT THE POLICIES ACTUALLY COVER

Institute War coverage protects against physical loss or damage to cargo caused by war-related events — vessel sinking, fire, structural damage, attack on the ship itself. If a tanker is hit by a drone and cargo spills, that is covered (if you bought the clause). If a container is destroyed in an air strike at port, that is covered.

What is NOT covered is what the insurance industry calls "frustration of voyage." When a vessel cannot reach its intended destination and must reroute, return to port, or offload at an intermediate location, the additional costs fall on the shipper: extra fuel, premium port fees, demurrage charges, charter extensions, storage at an unplanned location, transshipment costs, and potential cargo deterioration. These costs are often MORE expensive than the cargo itself in a tight supply chain.

MAGNITUDE OF THE UNINSURED EXPOSURE

Consider an Indian LPG tanker like Pine Gas or Jag Vasant now transiting the Strait of Hormuz under Iranian vetting. Each vessel carries approximately 30,000 tonnes of LPG. If rerouted via Africa instead of the direct Suez passage, the voyage extends by 20-25 days, burning additional fuel at current elevated prices. The cost differential alone could exceed $2 million per vessel. A shipper covered for cargo damage but not frustration faces total loss of margin on the transaction.

The scale of this gap is now visible. As of March 23, approximately 500 tanker vessels remain in or near the Persian Gulf. Even at conservative estimates, frustrated-voyage costs could reach $500 million to $2 billion across the fleet if the crisis extends another month.

TIMING AND POLICY DURATION RISK

War-risk coverage is dynamic in ways that most shippers do not anticipate. War-risk premiums and terms are reassessed continuously by underwriters. A policy active when a vessel loads cargo may be repriced, modified, or withdrawn entirely before that vessel reaches port. If the insurer downgrades or cancels coverage between load date and discharge, the shipper's coverage window closes mid-voyage.

This happened in February 2020 when war risk was withdrawn from Iranian ports mid-contract. Shippers with outstanding cargo in the Persian Gulf faced an overnight loss of coverage. The Hormuz crisis of 2026 presents the same risk. Underwriters may tighten terms or reduce coverage appetite as the conflict evolves.

WHY SHIPPERS SKIP THE COVERAGE

Two factors drive under-insurance. First, cost. War-risk premiums have surged 1000% in Hormuz-adjacent routes. For a shipper moving 50 containers per month, the added premium is substantial. Second, complacency. Many businesses operate in "high-risk regions" routinely — the Middle East, parts of Africa, the South China Sea — without active conflict. They skip war-risk coverage as a cost optimization, assuming conflict is low-probability.

That calculation worked until it did not. The 2026 Hormuz crisis was triggered in days, not months, leaving no time for shippers to adjust coverage retroactively.

THE CREW SAFETY DIMENSION

War-risk exclusions also create crew liability exposure. When a vessel is rerouted or detained due to conflict, seafarers face wage delays, extended deployment, and supply chain stress. Some crew contracts provide war-risk wage premiums; many do not. A Filipino seafarer on a frustrated voyage earning base wages while the shipowner absorbs rerouting losses faces financial strain. When crew quality suffers or fatigue incidents occur, the liability chain eventually reaches the shipper via general average claims.

REGULATORY AND BANKING DIMENSION

Letters of credit underpinning global trade often require "clean" bills of lading and proof of adequate insurance. War-risk gaps create L/C complications. A shipper may have insurance against cargo damage but face L/C rejection if war-risk coverage is deemed inadequate by the issuing bank. The cascade effect — insurance dispute, L/C dispute, payment delay, supply chain halt — can exceed the original cargo value.

SO WHAT NOW

Shippers in the Hormuz corridor face three options: First, purchase dedicated war-risk coverage immediately if not already in place, understanding that rates and terms may tighten as crisis duration increases. Second, reroute around Africa, accepting the cost but gaining certainty. Third, hold inventory in safer ports until Hormuz clarity emerges. None of these options are cost-free.

The broader lesson is that "all-risk" policies are only as good as their exceptions list. In volatile environments, the risks you most need to insure are the ones that standard policies most often exclude. The Hormuz crisis has turned that principle from theory to expensive reality for thousands of exporters who did not read the fine print.