Global container carriers continue to place large newbuilding orders, yet some trade lanes still face space shortages, delays and sudden freight-rate increases. In “Why supply and demand no longer tell the whole story in container shipping”, published on 5 October 2026, Michael Britton, Head of North America Market – Ocean Product at Maersk, argued that fleet size explains only part of available supply. Inventory decisions, trade patterns, and the efficiency of ports and inland transport all influence the capacity customers can actually access on a particular route. Read alongside Maersk’s fleet investments and recent industry data, his analysis highlights two essential questions: when new ships will arrive, and how quickly the existing fleet can complete its transport work.

A Large Orderbook Does Not Guarantee Space This Week

The first gap between newbuilding orders and immediate space shortages is the construction cycle. Xinde Marine News previously cited Linerlytica’s 21 September figures showing a global containership orderbook of approximately 15.6 million TEU, equivalent to more than 45% of the fleet at that time. Separately, Xinde Marine News’ coverage of Alphaliner’s Issue 45 reported that commercially idle containership capacity represented just 0.7% of the fleet as of 2 November. These snapshots from different dates describe a substantial pipeline of future supply alongside a very small pool of commercially idle capacity.

Maersk provides a concrete example. Its order for 26 dual-fuel containerships of 18,600 TEU each, confirmed in September and reiterated in its November third-quarter disclosures, represents 483,600 TEU of nominal capacity. Delivery is scheduled for 2029 and 2030. Those vessels can support fleet renewal and business requirements several years ahead. Current peak-season shipments, port delays and the replacement of expiring charters must still be handled by ships already delivered and available for deployment.

The charter market makes this timing gap particularly visible. Some new fixtures disclosed by Global Ship Lease (GSL) are not scheduled to begin until the third or fourth quarter of 2027, even though employment has already been secured for 36–38 months. Carriers are competing for ships that can join their networks at specific dates. Once suitable vessel sizes, delivery locations and charter commencement windows have been secured by other operators, a growing global orderbook may offer little relief to an individual carrier’s near-term requirements.

Ships Can Remain in Service While Effective Capacity Falls

A containership’s productivity depends heavily on the time required to complete a round voyage. Consider a simplified weekly service with a 70-day rotation requiring approximately ten identical vessels. If diversions and port waiting extend that rotation to 84 days, maintaining the same departure frequency requires approximately 12 ships. Cargo volumes have not increased, but vessel requirements have risen by 20%. Without the additional two ships, the carrier must adjust its schedule, port calls or the amount of cargo it can accept.

Britton’s article cited a Sea-Intelligence estimate that vessel delays had, at one point during the year, absorbed 8.5% of global deep-sea container capacity, equivalent to approximately 3 million TEU. The average for 2011–2019 was 2.2%. The article also noted that congestion had begun easing at some major ports. The estimate illustrates the scale of vessel time that disruption can absorb; its temporary peak should not be treated as a fixed description of current market conditions.

Maersk’s third-quarter results provide an operating example. Vessel utilisation remained at 96%, while loaded volumes fell 0.8% year on year. Its average realised freight rate reached US$3,287 per forty-foot equivalent unit (FFE), up 20% from the second quarter. The company linked constraints on capacity and loadings to adverse weather in Asia, port congestion and network disruption. High utilisation alongside limited volume growth shows how a fully deployed fleet can still struggle to carry more cargo when turnaround slows.

The mechanism also echoes the analysis presented by Adam Kent, Managing Director of Maritime Strategies International (MSI), at the Marine Money forum in Shanghai on 3 November. Kent considered cargo volumes, transport distance and vessel demand separately: longer voyages, slower sailing and additional waiting can cause vessel requirements to diverge from cargo growth. In container shipping, assessing the market similarly requires tracking how much vessel time is absorbed before a ship becomes available for its next cargo.

One-Way Growth Adds to Empty-Container and Port Requirements

Global average volume growth can also conceal pressure in individual directions. In its earlier analysis of Maersk’s second-quarter earnings call, Xinde Marine News highlighted comments by Chief Executive Officer Vincent Clerc that Far East exports continued growing without a corresponding increase in laden backhaul volumes. He illustrated how roughly 4% growth in global laden container volumes could translate into a 7–8% increase in terminal handling requirements because more empty containers also need to be moved. The comparison concerns the additional operating burden created by trade imbalances: the two growth rates refer to laden cargo and terminal activity respectively.

When outbound volumes expand rapidly but return cargo remains weak, carriers must move more empty containers back to export origins. Those boxes occupy vessel space and pass through terminals, depots and inland transport networks. If an import container cannot be matched efficiently with an export load after delivery, additional empty movements may be required. Slower equipment circulation can then tighten container availability at export origins. The same trade imbalance consequently affects vessels, equipment and terminal capacity.

A shortage of space on an export route therefore does not necessarily mean capacity is tight in every direction. A carrier may simultaneously face strong headhaul demand, weak backhaul cargo and empty containers accumulating in the wrong locations. Additional ships provide more slots, but matching cargo flows with equipment still takes time and money. For customers, global fleet growth ultimately matters through the availability of the required container type on a particular sailing from a particular loading port.

More Supply-Chain Nodes Require a Broader Fleet Mix

Changes in cargo origins and destinations also alter the types of ships the market needs. In earlier coverage of containership size and global supply-chain development, Xinde Marine News examined how additional overseas manufacturing locations can generate equipment imports, component procurement, intermediate-goods movements and regional distribution. Following that logic, the construction and operation of an overseas factory may create transport requirements at different stages and in different directions. The scale, frequency and port requirements of those flows will not all suit the largest containerships.

Vessels of around 24,000 TEU can deliver economies of scale on dense mainline routes served by suitable ports. Regional trades may instead require smaller ships capable of frequent calls. Channel depth, berths and crane capabilities also limit the interchangeability of different vessel sizes. An ultra-large ship cannot simply fill a gap left by a missing feeder vessel. Additional mainline slots still depend on feeder connections, terminals and inland transport to move cargo to its final destination.

Maersk’s selection of 18,600-TEU vessels this year reflects these deployment considerations. The eight ships announced on 9 February measure 366 metres in length and 58.6 metres in breadth, making them more compact than the largest 400-metre containerships. Maersk explicitly identified deployment flexibility as an important factor in its decision, saying the vessels would provide more options across its current and future networks. The value of a ship investment therefore depends on unit costs, port compatibility and the ability to move vessels between trades.

Moderate Annual Demand Can Still Produce a Booking Surge

Procurement and inventory decisions also shape transport demand. A given quantity of cargo is generally easier for a service to accommodate when spread evenly over several months. If businesses concentrate shipments into a few weeks to arrive ahead of tariff changes, higher surcharges or possible disruption, short-term demand can exceed the space available on established weekly services. Bringing in additional vessels requires completing existing voyages, arranging new port calls and positioning equipment. Supply cannot necessarily increase as quickly as bookings.

Maersk’s July North America Market Update, published on 29 June, documented this pattern. Customers brought forward seasonal inventories while responding to tariff and fuel-related uncertainty, tightening transpacific space. The company said it had introduced seasonal capacity through its TPX service, which was then expected to operate through the end of September, subject to demand. The interaction between earlier shipments and seasonal capacity additions shows how the timing of demand can change market conditions.

The sources of demand also warrant closer attention. In Maersk’s third-quarter announcement, Clerc identified electrification, energy investment and AI infrastructure expansion as drivers of industrial cargo flows. Xinde Marine News’ earlier analysis noted that such construction can generate opportunities in equipment, components and supporting logistics, while the actual increase in ocean cargo still depends on shipment volume, weight, transport mode and dispatch schedules. Consumer restocking and industrial procurement can affect the same trades, limiting the explanatory power of consumer indicators alone.

Record Deployment Can Also Reflect Late Ships

On 29 October, Sea-Intelligence reported that deployed capacity in October and November schedules had reached record levels across major East–West trades. One contributing factor was vessel bunching caused by congestion in Asia: ships originally scheduled to depart in the third quarter had been severely delayed, shifting their departures into later months and inflating the subsequent capacity figures. At the time, the consultancy expected average weekly deployment on Asia–North America West Coast services to reach 400,000 TEU in November.

For shippers, postponed sailings first create cargo backlogs. When ships subsequently arrive together, they can place simultaneous pressure on berths, yards and trucking. A higher monthly deployment total does not necessarily restore an even weekly service pattern. Assessing an improvement in supply requires checking actual departures, the continuity of subsequent sailings and how quickly cargo can leave the port.

Maersk Is Adding Ships and Terminal Capacity

These developments are already influencing Maersk’s capital allocation. In August 2024, the company announced plans to renew approximately 800,000 TEU through 50–60 owned and time-chartered newbuildings, while explicitly maintaining an overall fleet size of around 4.3 million TEU. By the second and third quarters of 2026, management was considering growth alongside replacement. Gemini’s improvements in vessel turnaround can increase output from existing assets, but as those efficiency gains become embedded in the operating baseline, continued growth with the market also requires additional ships.

The deployment response spans different time horizons. Newbuildings enter the longer-term construction programme, while nearer-term growth is supported by chartering and network redeployment. On the third-quarter earnings call, Clerc said Maersk would need some additional chartered tonnage to grow with the market in 2027, most of which had already been secured. He also acknowledged that the return to Suez was releasing capacity, although vessels had to complete their existing voyages before they could move to other services.

Investment is also progressing at ports. Maersk’s third-quarter announcement disclosed that APM Terminals broke ground in August on the new Laldia terminal project in Chattogram, Bangladesh, designed to add 900,000 TEU of annual handling capacity. In Brazil, the Suape terminal began operations in September, initially adding approximately 400,000 TEU of annual capacity. One project represents future expansion; the other has already entered service. Together, they show how Maersk is adding capacity both at sea and at the ports handling its cargo.

Additional ships can help maintain schedules and accommodate cargo growth. Improvements in terminal and inland capacity can reduce waiting and friction between transport stages. Both types of investment must be tested through operating performance: whether more ships can obtain suitable berth windows, and whether cargo discharged at an expanded terminal can leave efficiently by rail, road or barge. Moving containers more quickly into an already saturated yard will not deliver a corresponding improvement across the full transport chain.

Recovering Efficiency Could Release Another Wave of Supply

Current constraints on effective capacity do not establish that all future ships will be readily absorbed. In its 2027 outlook released on 5 November, Xeneta forecast global fleet growth of 6.8%, against demand growth of 2.5–4%. It also projected that full-year average spot rates in 2027 would be 30% below the third-quarter 2026 baseline. A significant condition underpinning that assessment is a wider return to the Red Sea and Suez Canal, releasing capacity absorbed by longer diversions.

Delivery pressure is also building further ahead. The MSI forecast presented by Kent in Shanghai put containership deliveries in 2028 at close to 4.8 million TEU. Under its recycling assumptions, net fleet growth would still be approximately 11%. These are forecasts, but they demonstrate how immediate vessel shortages can coexist with a future delivery surge. If a new ship replaces an old vessel within one company’s fleet and the older ship is sold to continue trading, global supply still increases. Actual withdrawals from service will influence the eventual scale of net additions.

Maersk is retaining room to respond to a weaker market. On the third-quarter call, Clerc said the company could, if necessary, return chartered tonnage equivalent to 10–15% of its overall fleet within a year. Redelivery reduces the carrier’s operated fleet, but those vessels may subsequently be chartered to other operators. For companies already committed to expensive multiyear fixtures, the speed at which freight rates fall and the pace at which fixed charter costs can be reduced will jointly determine operating pressure.

Market differences will increasingly emerge through turnaround on individual trades. If shorter port waits, a return to Suez and newbuilding deliveries occur together, available space could ease faster than delivery schedules alone suggest. If cargo growth remains concentrated in a few export directions and critical port and inland nodes repeatedly face disruption, additional ships may still fail to meet bookings at specific times. Carriers need to compare vessel requirements and long-term costs across these scenarios, while shippers need to assess freight rates alongside actual sailing schedules and warehouse arrival times.