The Number on Your Hull Policy: Agreed Value, Total Loss, and the Gap Nobody Checks

Somewhere in your hull policy there is a figure. It was probably set when the vessel was acquired, adjusted once or twice since, and has not been examined closely in years.

That number is not an administrative detail. It determines what you are paid if the vessel is lost, whether a casualty counts as a total loss at all, whether you are forced to repair a boat that is not worth repairing, and how much cover you can lawfully buy elsewhere. It is one of the few genuinely strategic decisions in a hull program and most operators treat it as a form field.

For anyone running older tonnage, and the average vessel in the global fleet is now around 23 years old, the consequences of getting it wrong have grown.

Agreed Value: What the Number Actually Does

Marine hull is written on an agreed value basis, which is unusual and worth understanding properly.

Under section 27(3) of the Marine Insurance Act 1906, subject to the provisions of the Act and in the absence of fraud, the value fixed by the policy is conclusive as between insurer and assured of the insurable value of the subject insured, whether the loss is total or partial.

That is a strong provision. It means the argument about what your vessel was worth happens at placement rather than at claim. If the vessel is a total loss, section 68 provides that the measure of indemnity under a valued policy is the sum fixed by the policy. The underwriter cannot come back afterward and say the market moved.

The practical benefit is certainty. Property insurance frequently applies averaging where the sum insured falls below actual value, reducing partial loss payments proportionately. Marine hull on an agreed value basis does not work that way for the purposes of section 27(3).

That certainty is why the number matters so much. It is fixed, it is binding, and you chose it.

The Two Values That Are Not the Same

Operators routinely conflate three figures that move independently.

Insured value is the agreed figure in the policy.

Market value is what the vessel would fetch in a sale today.

Replacement cost is what it would take to put equivalent tonnage on the water, which in a market with constrained yard capacity and elevated newbuild pricing may exceed both of the above.

For a Gulf operator with a twenty year old towboat, these three numbers can differ substantially. The market value may be modest. The replacement cost may be considerably higher, because the boat that would replace it is either an expensive newbuild or a scarce secondhand unit in a thin market. And the insured value may be whatever was set when the vessel was bought.

If your insured value tracks market value and your replacement cost has risen above both, a total loss pays you a sum that does not put you back in business. That is the gap in the title, and it is not covered by anything unless you address it deliberately.

Total Loss: Two Kinds

The Act distinguishes two.

Actual total loss, under section 57(1), arises where the subject insured is destroyed, or so damaged as to cease to be a thing of the kind insured, or where the assured is irretrievably deprived of it. Section 58 adds the missing ship, where a vessel has not been heard of after a reasonable time.

An actual total loss is factually obvious. The ship sank, burned out, or disappeared. No notice of abandonment is required.

Constructive total loss is where the disputes live, and it is defined in section 60. There is a CTL where the subject insured is reasonably abandoned because actual total loss appears unavoidable, or because it could not be preserved from actual total loss without expenditure exceeding its value when the expenditure had been incurred.

Section 60(2) gives two specific cases. Where the assured is deprived of possession by an insured peril and either recovery is unlikely or the cost of recovery would exceed the value when recovered. And, in the case of damage to a ship, where she is so damaged that the cost of repairing the damage would exceed the value of the ship when repaired.

That second limb is the one that matters for most casualties. Repair cost against repaired value.

The Trap in Section 27(4)

Here is the provision that catches people out, and it is the reason the insured value is not merely a payment figure.

Section 27(4) states that unless the policy otherwise provides, the value fixed by the policy is not conclusive for the purpose of determining whether there has been a constructive total loss.

Read that carefully. Your agreed value is binding for what you get paid. It is not, by default, the benchmark against which the CTL test is measured. Under the Act's default, the comparison is against the vessel's actual repaired value, which for old tonnage may be far below the insured value.

The Institute clauses displace that default, which is why the wording of your policy matters more than the statutory default.

Clause 19.2 of the Institute Time Clauses Hulls provides that no claim for constructive total loss based on the cost of recovery or repair is recoverable unless that cost would exceed the insured value, and that only costs relating to a single accident or a sequence of damages arising from the same accident may be taken into account.

The companion Disbursements and Increased Value clauses state the valuation principle directly at Clause 9.1. In ascertaining whether the vessel is a constructive total loss, the insured value in the hull and machinery insurances is taken as the repaired value, and nothing in respect of the damaged or break-up value of the vessel or wreck is taken into account.

So under Institute terms your insured value becomes the CTL threshold. Repair cost must exceed it.

Two consequences follow immediately, and they run in opposite directions.

A high insured value makes a CTL harder to establish. Repair costs must climb higher before the vessel is written off. You may find yourself with a severely damaged old boat that is not a total loss because you insured it generously, facing a repair bill you would rather not spend on that hull.

A low insured value makes a CTL easier to establish and pays you less when it happens. A moderate casualty tips into total loss territory, the underwriter pays the low agreed figure, and you cannot replace the vessel.

The single accident restriction in Clause 19.2 is worth noting separately. Damage accumulated across multiple incidents cannot be aggregated to reach the threshold. Each casualty stands alone.

Notice of Abandonment

Where a CTL arises, section 61 gives the assured a choice. Treat the loss as a partial loss, or abandon the subject insured to the insurer and treat it as an actual total loss.

Choosing the second requires notice of abandonment. Section 62(2) is permissive about form. Notice may be given in writing, by word of mouth, or partly in each, and in any terms indicating the intention of the assured to abandon the insured interest unconditionally to the insurer.

Permissive as to form does not mean permissive as to timing. The Act requires notice with reasonable diligence after receipt of reliable information of the loss, and delay can forfeit the right to claim a CTL, leaving the assured with a partial loss claim on a vessel that is commercially finished.

In practice, brokers have developed standard wordings, and the sensible course when a serious casualty occurs is to put your broker and your underwriter on notice immediately while the facts are still being established. It is considerably easier to withdraw a notice than to explain a delay.

No notice is required for an actual total loss.

Increased Value and the 25 Percent Rule

If the insured value understates what the vessel is worth to you, the mechanism for closing that gap is increased value cover, and the Institute clauses both permit it and cap it.

Clause 21.1.1 of the Institute Time Clauses Hulls permits additional insurance for disbursements, managers' commissions, profits, or excess or increased value of hull and machinery, in a sum not exceeding 25 percent of the value stated in the hull policy.

Clause 21.1.2 permits insurance of freight, chartered freight, or anticipated freight insured for time, up to 25 percent of the stated value less anything insured under 21.1.1.

Increased value cover is written on a total loss only basis. It responds when the vessel is an actual or constructive total loss and pays the additional sum insured. It does not contribute to partial losses.

The commercial logic is that it lets an owner insure the true economic value of the vessel while keeping the hull value, and therefore the CTL threshold, at a level that reflects repair economics. You are not forced to choose between adequate total loss recovery and a sensible write-off point.

The Warranty That Voids Your Cover

Clause 21 is a warranty, not a permission, and breaching it has consequences beyond the additional policy.

The clause warrants that no insurance on the enumerated interests in excess of the permitted amounts, and no other insurance including total loss of the vessel written on a policy proof of interest or full interest admitted basis, will be effected during the currency of the hull insurance by or for the account of the assured, owners, managers, or mortgagees.

Buying more increased value cover than the 25 percent limit permits is a breach of warranty on your hull policy. That is a materially worse outcome than simply having an unenforceable top-up.

There is one carve-out. A breach does not afford underwriters any defense to a claim by a mortgagee who accepted the insurance without knowledge of the breach. Your bank is protected. You are not.

The practical point is that increased value cover has to be coordinated with the hull placement rather than bought separately without reference to it. If you have added cover through a different broker or a different market, the aggregate needs checking against the warranty.

Aging Tonnage Changes the Calculation

Everything above becomes more consequential as a fleet gets older, and fleets are getting older.

The average age of the global fleet reached 23 years in 2025, with vessels over 20 years old accounting for over half of all safety incidents. Geopolitical volatility and limited shipyard capacity have delayed renewal, and regulatory uncertainty around alternative fuels has caused operators to defer newbuilding decisions and run existing tonnage longer than planned.

Meanwhile machinery claims inflation has not returned to pre-Covid levels, with repair costs continuing to rise.

Put those together. Older hulls, more incidents, higher repair costs, and market values that have not risen in step. The result is that the ratio of repair cost to vessel value has moved against owners, which means more casualties tip into CTL territory than would have five or ten years ago.

For an owner of aging tonnage, that makes the CTL threshold a live commercial variable rather than a theoretical one. It also means underwriters are looking harder at the values you propose, since an inflated agreed value on an old hull creates an incentive problem they are alert to.

What to Actually Do

Review your agreed values annually, not at acquisition. The number should reflect a considered view of market value, replacement cost, and where you want the CTL threshold to sit. That is three inputs, not one.

Decide deliberately where you want the write-off point. If you would rather be paid out than repair a twenty five year old boat after a serious casualty, a lower hull value with increased value cover on top achieves that. If you want the vessel repaired and returned to service, a higher hull value makes that outcome more likely.

Check your increased value aggregate against the 25 percent warranty. If cover has been added over time or through more than one broker, this is worth confirming in writing.

Understand what your mortgagee requires. Financing terms commonly specify minimum insured values, and those requirements constrain the choices above. Know them before you propose a change.

Get valuations you can defend. Underwriters will test a proposed value against registry and market data. A supported figure is accepted more readily than an asserted one, and the exercise tells you something useful about your own fleet.

Put your broker and underwriter on notice immediately after a serious casualty. The notice of abandonment question does not wait for the survey report.

The Bottom Line

Agreed value insurance is a genuine advantage. It removes the argument about what your vessel was worth from the moment when you least want to have it.

The price of that advantage is that the argument happens in advance and you have to win it with yourself. The figure you set determines your recovery, your write-off threshold, the maximum additional cover you can lawfully buy, and whether a bad casualty ends with a check that replaces the boat or one that does not.

For operators running tonnage that is older than they planned, in a market where repair costs are rising faster than vessel values, that figure deserves a proper look at the next renewal rather than a copy forward from the last one.