Updated 26 September 2026: this note replaces the earlier Trade Lane Growth article with an expanded analysis of shipping commitments, resilience and capital allocation. Public-source research checked through 24 September 2026.
A good year gives a shipping company cash to invest. It also makes a longer charter easier to justify: the ship is needed, hire can be fixed and customers want dependable capacity. The difficulty comes later, if the service needs fewer ships but the hire payments continue. Before committing, I would want an answer to one question: what work will this ship still be doing if today’s favourable conditions fade?
For me, the employment case comes before the market view. Which customers need the capacity, what contribution will their cargo earn, and how long is that business likely to last? A strong cash balance gives management room to act, but it does not make an uncertain deployment more profitable.
This article examines that decision from the container operator’s perspective. It follows one hypothetical choice between a three-year charter and a more expensive one-year charter, then asks what the result means for the fleet and the cash available to invest. The question is how to turn a profitable period into a commitment the business can sustain.
The calculations use hypothetical cost units, not current charter quotations or subscription data. Public sources provide operational context. Developments were checked on 24 September 2026; the argument does not depend on predicting the end of the Iran military conflict.
1. Establish what the earnings can support
Profitability can improve for several reasons at once. A service may win cargo, improve utilisation, reduce operating waste and benefit from firmer rates. It may also need more ships to maintain frequency because voyages take longer. These effects have different implications for a commitment that extends beyond the current market.
Maersk’s August 2026 interim announcement offers a useful example of this complexity. It described strong demand, imbalanced trade flows and pressure on landside infrastructure alongside volume and earnings growth. Management also argued for investment in infrastructure and scale. The announcement illustrates that operational friction and genuine demand can coexist; it does not provide a decomposition of how much profit is repeatable. [1]
Hapag-Lloyd’s Q2 2026 results show why that distinction matters. Its average freight rate increased from US$1,354 to US$1,475 per TEU year on year, yet liner EBIT fell from US$167m to US$153m. The company attributed pressure on liner earnings to additional bunker, insurance, storage, rerouting and inland transport costs. [7] Higher rates and higher volumes can coexist with lower operating earnings. These are company-level observations, not estimates of the return on a particular ship.
There is a trap in this exercise. Better utilisation and stronger pricing may come from the same increase in demand. Treating them as separate, permanent gains would overstate the earnings available to support a charter. If the effects cannot be disentangled, show a range and explain what drives it.
Cost recovery needs its own treatment
The Iran military conflict provides an example of why earnings, operating costs and continuity requirements must be examined together. Maersk’s emergency bunker notice, updated in March 2026, described alternative sourcing and fuel redistribution and linked its surcharge to availability, cost and mix beyond an existing fuel mechanism. [2]
Surcharges may be necessary to keep a service commercially viable. Emergency bunker and peak-season charges address different conditions, so each needs to be assessed against its stated purpose, scope and review process. The investment question is how much contribution remains after the associated costs have been met. A public notice can explain a charge; it cannot independently establish whether its amount is appropriate.
There is a separate cash question. Even when a surcharge fully recovers an additional expense, the operator may pay for fuel or transport before collecting from customers. That gap creates a working-capital requirement. It should appear in the cash forecast, without being deducted a second time from profit.
The conclusion at this stage should be modest: identify the contribution likely to remain under weaker conditions and the cash needed to operate through them. A larger revenue figure alone provides neither answer. The next step is to establish whether there is a service worth committing that money to.
2. Define the job before choosing the ship
Start with cargo and the customer promise
This is where macroeconomic developments enter the investment case. Changes in consumption and industrial production affect cargo; tariffs and sourcing shifts can change origins, destinations and shipment timing; inventory rebuilding can temporarily lift bookings. Their effects should be translated into route-level volume, distance and contribution assumptions. A headline trade-growth number cannot do that work on its own.
I would separate cargo already supported by credible customer relationships from growth that still depends on winning business. Then I would stress both for weaker volumes, rates and retention. The commitment should be tested against both the loss of existing business and a shortfall in the growth plan.
This does not mean every year of a charter needs to be matched by a signed customer contract. That would be too restrictive for a liner service with recurring but frequently repriced bookings. A longer commitment can be supported by diversified customers, repeat cargo and a service that remains competitive at lower rates. I would distinguish that evidence from a sales pipeline whose conversion is still unproven. The test is whether the employment case is durable, not whether every future booking is already contracted.
A credible employment case also needs a reason for customers to keep using the service. Reliability can provide that reason, but only if the proposed investment improves the part of the journey that matters to them.
Make resilience earn its place in the case
For a cargo owner, the relevant comparison is total delivered cost. A higher freight bill may be worthwhile if it reduces expected stockouts, production interruptions, emergency transport or inventory financing costs. It may not be worthwhile for low-urgency cargo with ample stock and inexpensive alternatives. Willingness to pay is therefore specific to the cargo and the consequence of delay.
For the carrier, the benefit must translate into contribution through pricing, retention or lower delivery costs. Cost-recovery surcharges and a premium for better service have different purposes; neither establishes the other. I would ask the commercial team which customers would benefit, what disruption would be avoided and how that value would reach the operator.
Securing a ship is an input to reliability, not proof of it. A vessel can be available while the service still suffers from congested terminals, missed connections or unreliable inland transport. The operator should identify which part of the journey it is protecting and measure the resulting service outcome.
A current operational check. Maersk’s 23 September 2026 Middle East update describes selective booking suspensions alongside available landbridge services, and rerouting of some shipments through Fujairah with onward landside transport to Jebel Ali. [6] My reading is that resilience must be assessed across the complete delivery route: a ship secured under charter may still be unable to deliver the intended service. This is a carrier-specific snapshot, not a claim about every operator or trade.
The World Bank and S&P Global Market Intelligence’s Container Port Performance Index measures vessel time in port, including waiting and berth time. Its guidance cautions that results also reflect external disruptions and route changes. [3] For an investment decision, I would use this evidence to ask where time is being lost before proposing another ship. Port-time evidence cannot, by itself, establish door-to-door delivery reliability.
Before adding a ship, management should compare alternatives that address the same bottleneck: access to slots on another service, operational improvements, a revised rotation or better coordination with terminals and inland providers. These choices introduce their own dependency and contractual risks. An additional ship is worth funding only if it addresses the service problem better than these alternatives.
Separate additional cargo from additional sailing time
Once the service is defined, translate it into ships and duration. A requirement driven by more cargo may persist even after disruption eases. A requirement driven by a longer round trip can unwind while the underlying customer business remains intact.
Consider a service with weekly departures. A 70-day round trip requires ten ships in a simplified steady-state schedule. If the round trip extends to 84 days, maintaining the same frequency requires twelve. Restoring the 70-day cycle releases two ships from that service without a single new vessel being delivered.
Service illustration · The same customer frequency can require different fleet commitments
One departure every seven days
Two additional ships maintain the same frequency
Illustrative schedule: identical vessels, no extra reserve, continuous operation. Required ships = round-trip days ÷ seven.
This arithmetic does not forecast a freight-rate decline. Cargo growth, slower sailing, retirement or redeployment could absorb the released capacity. It does show why an investment case needs an operational recovery scenario as well as a disruption scenario.
There is a historical precedent for this distinction. In March 2024, IMF staff reported that Cape of Good Hope diversions added at least ten days to average delivery times and could shift recorded imports between months. [5] The episode supports examining bookings and sailing time separately; it does not calibrate the illustrative schedule above or establish today’s conditions.
Those two ships still have to go somewhere. One approaching charter expiry may be redelivered; one with several years remaining needs another source of earnings or a negotiated exit. Selling an owned ship is another possibility. None of these options should be valued as though the rest of the market were unaffected by the same recovery in sailing times.
This leaves two different capacity needs: ships required for a durable service, and ships required while voyages remain unusually long or cargo demand temporarily increases. They need not carry the same commitment. The operator can now compare the price of securing access with the price of being able to return a ship earlier.
3. Put a price on the commitment
Assume equivalent ships and service capability under both choices. The three-year charter costs 12 units a year; the one-year charter costs 14 units initially. The numbers are deliberately hypothetical. Their purpose is to show how duration, renewal and alternative employment affect the decision.
The long choice commits 36 units in total. The short choice pays a 2-unit premium initially, after which the operator can renew at the price then available or redeliver if the ship is no longer required. Short duration alone provides neither a renewal guarantee nor a replacement vessel.
| Case | Years 2–3 assumption | Long: total hire | Short: total hire |
|---|---|---|---|
| Need continues; hire stays high | Renew at 14 units per year | 36 | 42 |
| Need continues; hire falls | Renew at 9 units per year | 36 | 32 |
| Need ends after Year 1 | Redeliver; no renewal | 36 | 14 |
The first case favours the long choice by 6 units; the second favours the short choice by 4. The final row shows payments only and deliberately leaves out recovery through alternative employment. It must not be interpreted as a 22-unit economic advantage without examining that recovery and the costs of exit.
These cases are selected to reveal the decision boundaries; no probabilities are assigned. Where the same ship earns the same service contribution under both structures, that contribution cancels in the hire comparison. But a cheaper charter can still support an unprofitable service. The operator must separately establish that expected customer contribution covers hire, other relevant costs and its required return.
If the ship is still needed, compare the cost of renewal
If the ship remains employed for three years, the short choice has 22 units left for later hire before reaching the long choice’s total of 36. Spread over two years, that gives a break-even renewal rate of 11 units per year. Later hire below 11 favours the short choice on hire alone; hire above 11 favours the long choice.
Source: author’s hypothetical model. [M1]
An extra 2 units of short-specific replacement and interruption costs reduces that threshold to 10. These costs must not also be counted as lost contribution elsewhere. The threshold is a condition for choosing a structure, not a forecast that renewal rates will fall.
The 11-unit threshold applies before signing, when all three years are still choices. At the end of Year 1, that year’s hire has already been paid. The operator should compare future contribution and remaining renewal, replacement or exit costs. Renewal above 11 may still be the best choice at that later date; it simply means the original shorter strategy has not achieved the illustrated hire saving.
The final comparison should use actual payment dates, equivalent vessel performance and negotiated terms. A short-tenor premium in a real market may also reflect expected future rates or immediate scarcity; it is not necessarily a pure price for flexibility. The model asks whether paying that premium is worthwhile under the operator’s circumstances.
The distance from the threshold matters as much as the threshold itself. If later annual hire were assumed to be 10.8 units, the short choice would save only 0.4 units over three years: 36 − 14 − (2 × 10.8). A small interruption cost could remove the saving. I would call that a close commercial judgement, not a decisive financial advantage. Management should state how much unmodelled cost the recommendation can absorb before it reverses.
If the job disappears, test what the earlier exit avoids
If the need ends after Year 1, the long choice still owes 24 units. The short choice has paid 2 extra units initially, so its advantage before mitigation is 22. The long ship may earn money elsewhere, be sublet where permitted, or be returned through a negotiated settlement. Let R be that recovery after incremental repositioning and other recovery costs, but before the original hire already counted. Let E be additional costs specific to the short choice’s exit.
Short-choice advantage = 22 − R − E. Here, R is the longer charter’s net recovery and E is the shorter charter’s additional exit cost. With recovery of 10 and no additional exit cost, the shorter choice is ahead by 12 units. With recovery of 20 and exit costs of 2, the advantage disappears.
The recovery assumption deserves close scrutiny. If weaker demand removes the ship’s original job, who will employ it next, and at what contribution? Assuming an easy redeployment at strong rates would flatter the longer charter. Assuming the ship earns nothing would flatter the shorter one. I would want a named alternative service or a defensible range of recovery values, supported by the rights available under the contract.
That is the choice management must price. Shorter cover can save money if later hire falls or the ship is no longer needed. Longer cover can save money and secure access if the requirement persists and renewal remains expensive. The scenarios show what changes the answer; choosing between them requires a view of the service’s duration, renewal availability and alternative employment.
Nor are fixed three-year cover and an unprotected one-year charter the only possible offers. Extension options, staggered delivery dates or slots on another service may change the exposure. Each has a price and practical limits. The example identifies what protection is worth buying; the next step is to ask whether a better contract can provide it, using equivalent service capability and executable terms.
4. Test the choice across the fleet
The cheapest structure for one ship may create a difficult fleet exposure. If several charters expire together, the company could have to renew them all in the same tight market. If all are fixed for longer, it may struggle to release capacity when services need fewer ships.
At fleet level, I would be more interested in the distribution of expiry dates than in a headline percentage of chartered tonnage. Ten short charters expiring together may create more renewal risk than a mix of longer commitments with staggered maturities. Equally, diversification across ships offers limited protection if they all depend on the same cargo demand or constrained port.
I would also test the employment and recovery assumptions together. Weak cargo contribution, falling sublet earnings and delayed customer receipts are a plausible combined downside. An attractive average return is insufficient if the company cannot fund that period. A separate upside case is also needed: if demand stays strong, can the operator secure replacement ships without losing customers or paying more than the service can earn?
There is also a legitimate cost to waiting. A company can lose a vessel slot, a service opportunity or a customer that needed a credible capacity commitment. That cost should be described as foregone contribution with a realistic probability and duration, rather than as a general fear of missing out. Where the evidence supports durable employment and replacement access is scarce, the longer commitment may be the conservative decision.
My preference would be to separate a core capacity requirement from a contingent one. Core capacity supports services whose customer economics remain credible through the downside. Contingent capacity addresses cargo or voyage-duration requirements that may unwind. This is not a prescribed owned-to-chartered ratio. It is a way of testing why each obligation exists, then staggering maturities so that the company can adjust without having to renegotiate the entire fleet in one market.
These choices remain subject to fuel access, vessel performance and contractual rights. The supporting checklist covers the evidence needed for approval. Purchasing a vessel also requires a separate ownership analysis; the charter comparison cannot settle that decision.
5. Decide how much cash the business can commit
The model compares charter structures; it does not establish whether either service is worth funding. Before approving one, management must pass two tests: the service earns an adequate return over the commitment, and the company can fund the downside after meeting its existing obligations.
The return test should be incremental to the best feasible alternative. Begin with cargo receipts, deduct hire and the fuel, port, equipment, inland and other cash costs attributable to delivering the service, then allow for mobilisation, exit and working-capital timing. Include any contribution displaced from existing services. Discount those dated cash flows consistently. Do not subtract a cost again if it is already included in the contribution measure. A positive accounting margin, a lower hire bill and a positive investment return answer different questions.
A company with ample cash but weak opportunities need not expand. A company with an attractive opportunity but limited liquidity may need to stage the commitment, change its financing or decline it. Debt repayment, maintenance, operational improvements and retaining cash should compete with expansion on their own merits. Current earnings make more choices possible; they do not establish which choice creates value.
For that reason, I would not start with a target percentage of current earnings to reinvest. I would work through the credible opportunities, reserve cash for existing obligations and the agreed downside, and commit only where the remaining funding supports an adequate return. If a larger commitment would consume that reserve, staging the investment may be preferable even when its expected return is attractive.
The cash test should use the lowest forecast balance during the commitment, not just the total at its end. Deduct existing obligations, reflect when receipts arrive and preserve the minimum liquidity approved by the board. If the case requires borrowing, establish that the funding and covenant headroom remain available in the same downside. This makes the affordable commitment a cash-flow result rather than a percentage of last year’s profit.
I would record the approval in terms of the maximum obligation, the downside cash requirement and the evidence needed before the next commitment. The next review can then compare actual cargo, costs and available capacity with the assumptions that justified approval.
Approve longer cover when the service has credible employment, replacement access matters and the downside can be funded. Prefer shorter cover when the potential release of capacity is material and the savings from adjusting exceed the premium and renewal risk. If neither case has adequate return or liquidity, change the size, timing or terms before committing.
For a close result, show the assumption that would reverse it and the cost of being wrong. A narrow model advantage is not enough to justify an irreversible obligation.
6. Turn approval into a reviewable decision
Approval should leave a record of what would change the next decision. If customer cover weakens, who revises the employment case? If the cash low point breaches the agreed limit, who stops the next commitment? The dashboard below assigns those questions to the people able to act on them.
| Monthly decision measure | Mock tracker entry / trigger | Owner and response |
|---|---|---|
| Decision reversal margin | Record the change in hire, cargo contribution or added cost that removes the proposed advantage. Illustrative 10.8 renewal case: only 0.4 units of headroom. | Finance + Chartering: renegotiate or refresh the recommendation when executable terms consume that headroom. |
| Commitment / renewal economics | Before signing: compare full strategies. At expiry: compare remaining cash flows and service contribution. | Chartering + Finance: refresh offers and costs; exclude sunk first-year payments from the renewal decision. |
| Alternative employment | Model reference: short advantage = 22 − net recovery − short-specific exit costs. | Commercial: document net earnings, permissions and repositioning. |
| Customer coverage | Show contracted and evidenced recurring contribution separately; stress repricing, retention and unproven growth against hire commitments. | Commercial + Finance: escalate uncovered periods and concentrated renewals. |
| Liquidity low point | Populate minimum cash after joint freight, hire and receivables stress. | Treasury: compare with board-approved minimum liquidity. |
| Capacity release | Track round-trip days and ships required for promised frequency. | Operations: prepare redeployment before schedule recovery releases ships. |
| Maturity concentration | Show TEU and hire obligations expiring in each quarter. | Fleet: stagger exposure and test replacement access. |
| Supply pressure | Track actual deliveries, slippage, retirements and suitable competing tonnage. | Strategy: revise employment case; do not use orderbook ratio alone. |
The review frequency should follow the exposure. A monthly meeting may suit the normal cycle, but a threatened liquidity limit, loss of route access or material customer cancellation should trigger an earlier review. The purpose is to change the next decision while options remain available.
MANAGEMENT TAKEAWAY
Approve the employment case before the commitment
I would support a longer charter when the ship has credible employment through weaker conditions and the company can afford the downside. Where the requirement may disappear, I would price an earlier exit before committing. The same fleet can need both. The decision should follow the work each ship is expected to do, not a blanket preference for long or short cover.
- Commercial: show the customer contribution that supports the service, its duration and the downside if cargo weakens.
- Chartering and Operations: compare equivalent executable offers, identify the value of access or earlier redelivery, and document alternative employment.
- Finance: test the return and lowest cash balance under linked adverse conditions. An attractive average outcome does not excuse an unaffordable downside.
- Approver: record the obligation being accepted, the exposure left open, the owner of each trigger and the next decision date.
If the return is inadequate or the cash shortfall unaffordable, resize, renegotiate, stage or decline. If the case passes, commit deliberately—and reassess future choices using future cash flows.
THE DECISION IN ONE VIEW
From strong earnings to a supportable commitment
Start with the service requirement. Then choose the protection—and check that its cost is affordable.
Identify what will remain
Separate recurring cargo contribution from cost recovery and temporary capacity pressure.
Protect access
Test a longer charter where losing capacity would damage an established service.
Can customer contribution and liquidity support the obligation if rates weaken?
Protect the exit
Test shorter cover where cargo needs or voyage duration may fall.
Do avoided costs justify the initial premium, renewal exposure and exit costs?
Price the trade-off
Before signing: the hypothetical short choice costs 2 extra units initially. Continued employment breaks even at 11 units/year of later hire. If employment ends, test recovery and exit costs. At expiry, recalculate from remaining cash flows; 11 is not a renewal rule.
Apply the common approval test
Customer economics • operational fit • contractual rights • downside liquidity • competing uses of capital
Commit, stagger exposure and assign review triggers.
Resize, stage, renegotiate or defer the commitment.
Illustrative decision framework, not a market forecast. The hire threshold assumes equivalent ships, equal annual employment and uninterrupted renewal; additional costs change it. A fleet can combine both forms of protection.
Supporting checks and calculation notes
Detailed checks · contracts, liquidity, operations and ownership
| Challenge | Why the case can fail | Evidence needed before commitment |
|---|---|---|
| Customer duration | A three-year charter can outlast contracts that reprice or expire within months. | Contribution coverage by month; minimum-volume enforceability; renewal concentration and customer credit. |
| Correlated downside | Freight earnings, sublet rates and vessel values may weaken together. | A joint downside case; do not treat recovery value as an independent hedge. |
| Expiry concentration | Many short contracts can create one large renewal exposure. | A monthly maturity ladder by size, route and counterparty, including delivery and redelivery windows. |
| Operational bottleneck | An additional ship cannot necessarily resolve port congestion or an inland constraint. | End-to-end service capacity, schedule recovery and cargo acceptance; test the binding constraint. |
| Cash timing | Hire and bunkers may be payable before customer receipts. | Monthly liquidity after committed capex, debt service and working-capital stress. |
| Ownership economics | A lower purchase price does not establish an attractive total return. | Purchase and disposal cash flows, OPEX, dry-dock, debt covenants and residual-value downside. |
| Fuel and compliance | A technically capable vessel may lack commercially reliable fuel access. | Route-specific fuel supply, operating restrictions, retrofit economics and contractual allocation of cost. |
| Commercial response | Added capacity can trigger price or service responses from competitors. | Contribution after plausible competitive response, not just unchanged market share and pricing. |
| Counterparty and route access | Contracted capacity may not translate into deliverable service if an owner, supplier or trading route becomes unavailable. | Counterparty credit, insurance coverage, permitted trading areas and disruption clauses; specialist review where required. |
| Implementation capacity | A financially attractive addition can underperform if delivery, crewing, maintenance or network integration is not ready. | A funded mobilisation plan, accountable owners and realistic start-up dates. |
A fuel-readiness designation is only a starting point. Conversion cost, fuel supply on the intended route and performance under the agreed contract determine its commercial value. I would want those questions answered before paying a premium for the specification.
BIMCO’s 2026 biofuel clause provides a concrete example. It addresses agreed fuel specifications, owner consent for other fuels, testing costs and adjustments to speed and consumption warranties. [4] The investment implication is that technical fuel capability is only part of the value proposition: the agreed contract determines how performance and cost exposure are shared. This model clause is not evidence that any particular charter contains those protections.
Ownership needs a separate assessment of purchase price, financing, operating and dry-docking costs, delivery timing and residual value. The charter example cannot establish a buy-versus-charter recommendation.
How payment timing changes the threshold
Discounting makes the threshold stricter because the short choice pays its premium early and receives any savings later. Using annual year-end payments solely to illustrate timing gives:
| Illustrative discount rate | Break-even annual renewal hire |
|---|---|
| 0% | 11.00 units |
| 8% | 10.88 units |
| 12% | 10.82 units |
The main chart uses undiscounted annual amounts to make the comparison readable. An actual approval should use contractual payment dates and a suitable discount rate, together with tax, financing and relevant operating cash flows.
Sources and methodology
- Maersk, Interim Report Q2 2026 announcement, 13 August 2026. Used as an attributed example of demand, congestion and management’s investment rationale, not as evidence for the hypothetical charter assumptions.
- Maersk, Introduction of temporary Emergency Bunker Surcharge, updated 31 March 2026. Historical operational explanation, not a current price quotation. The surcharge notice and Q2 announcement were rechecked on 24 September 2026.
- World Bank and S&P Global Market Intelligence, Container Port Performance Index: overview and interpretation guidance. Accessed 21 September 2026. Supports the port-time measurement and external-factor caveat; not a measure of end-to-end reliability or proof of causation.
- BIMCO, Biofuel Clause for Time Charter Parties 2026, particularly subclauses (a), (b) and (j). Accessed 21 September 2026. Illustrates contractual treatment of fuel specifications, testing and performance warranties; applicability depends on the agreed charter.
- Kamali, Koepke, Sozzi and Verschuur, “Red Sea Attacks Disrupt Global Trade”, IMF Blog, 7 March 2024. Accessed 22 September 2026. Brief paraphrase of the reported delay mechanism and statistical timing caveat; no source chart or dataset is reproduced. The post expresses its authors’ views. It is historical context, not a current-market benchmark.
- Maersk, Middle East Operational Update 49, 23 September 2026. Accessed 24 September 2026. Supports the short discussion of selective booking restrictions, landbridge availability and rerouting. The operational position is time-sensitive and carrier-specific; no tariff amounts or source graphics are reproduced.
- Hapag-Lloyd, Earnings recovery in Q2 despite substantial cost headwinds, H1 2026 results release. Accessed 24 September 2026. Q2 2026 versus Q2 2025: average freight rate US$1,475 versus US$1,354 per TEU; liner EBIT US$153m versus US$167m. These measures have different units and are not a causal decomposition. No source chart is reproduced.
M1 · Author’s illustrative model. All numerical chart inputs are hypothetical: long annual hire L=12; initial short hire S=14; a three-year horizon; later renewal examples 14 and 9. Long total = 3L; short total if retained = S+2H; short saving = 3L−S−2H. If redelivered after Year 1, short advantage = 3L−S−R−E. Discounted renewal threshold satisfies (S−L)/(1+r)+(H−L)[1/(1+r)²+1/(1+r)³]=0. No actual vessel, market date or company economics is represented. Diagrams and the infographic are original explanatory illustrations. Public sources support the accompanying operational discussion, not these assumptions.
Additional sensitivity: At hypothetical annual renewal hire of 10.8, total short hire is 35.6, leaving a 0.4-unit undiscounted advantage over 36. This is a sensitivity of the existing example, not a market estimate. Full service cash flows and contractual alternatives are discussed conceptually; their returns are not calculated without inputs.
