Insurance and class: the two certificates that decide whether a tanker can trade

Two pieces of paper

Strip away the commercial detail and a merchant ship’s ability to trade rests on two documents that a third party issues and can withdraw.

The first is evidence of protection and indemnity cover: third-party liability insurance for pollution, wreck removal, crew injury, cargo and collision claims. The second is a classification certificate, issued by a society that has surveyed the hull, machinery and equipment against its rules, and on which the flag state relies when issuing statutory certificates.

Neither is issued by a government. Both are concentrated in a small number of providers. That concentration is what makes them effective sanctions levers, and it is also what makes their absence dangerous.

Why P&I cover is not ordinary insurance

The liabilities a tanker can create are enormous and open-ended. A major spill costs far more than the ship is worth, and no single insurer would carry that alone.

The answer the industry built is mutual: shipowners form clubs, the clubs pool claims above a retention, and the pool is reinsured collectively. The clubs of the International Group between them cover the great majority of world tonnage for these liabilities, with limits that no small commercial insurer can match.

That structure is why “the vessel has insurance” is a weaker statement than it sounds. A certificate from an unfamiliar insurer in a jurisdiction with limited supervision may be perfectly genuine as a document and still be worthless as a promise, because the question is not whether cover exists but whether the insurer could pay a nine-figure claim.

The international regime for oil pollution compensation assumes a functioning chain: the shipowner’s liability, backed by insurance, backed in participating states by the compensation funds. A vessel outside that chain shifts the risk to whoever’s coast it damages.

What class does

A classification society surveys the ship through its life and certifies that it meets the society’s rules. Flag states delegate statutory survey work to recognised societies, and port state control inspectors, charterers, insurers and financiers all rely on class status as a proxy for condition.

Losing class is therefore not a paperwork problem. It signals either that the ship failed survey, or that the society chose to end the relationship. Vessels dropped by a widely recognised society sometimes reappear with a smaller one whose surveys are less exacting, which is a downgrade that the rest of the system can see.

Where sanctions bite

Both services are explicitly targeted.

The EU regime prohibits providing a range of maritime services, including insurance and classification, in connection with listed vessels. The UK’s price-cap and services regime works the same way for the trades it covers. The practical effect is that a designation does not merely bar a port: it removes the counterparties that make the ship insurable and certifiable in the mainstream market.

That is the mechanism behind the fleet this site tracks. Once mainstream cover and class are unavailable for a particular trade, the vessels serving that trade are the ones prepared to operate without them, and those are, predictably, the oldest and cheapest hulls.

What it means for a coastline

The risk is not evenly distributed. The revenue from the trade goes to the operators; the exposure sits with whichever state is nearest when something fails.

A twenty-five-year-old tanker, classed by a society outside the main association, insured by a company nobody in the market has dealt with, managed by a company formed last year, transiting a strait in bad weather, is a scenario that European and Asian coastal states have been describing publicly for several years. The port-state control system is the main defence, and it can only inspect ships that come into port, which listed vessels increasingly avoid.

What this site records

Vessel pages do not carry insurance or class status. No authority publishes it in the sanctions lists, and commercial databases that do carry it are licensed in ways that do not permit republication here.

What the pages do carry is the measure type for each listing, which tells you whether a services ban applies, and the vessel’s age and type, which is the best available proxy for the risk discussed above. The statistics page shows the age distribution across the whole listed fleet, and it is the single most telling chart on this site.