Shipping Emissions Metrics Mask True Cargo Efficiency
Logistics managers must evaluate emissions per TEU to accurately measure the environmental impact of ocean freight.
Updated on Oct. 16, 2026 in Transportation
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A new industry case study from VesselBot highlights that absolute emissions totals are misleading indicators of operational efficiency for container shipping. For businesses relying on ocean freight, the report underscores that vessel utilization and per-unit cargo capacity are better metrics for measuring logistics-related environmental impact.
Why it matters
Operators often prioritize low absolute carbon emissions, but this data shows that highly utilized ships can produce more total emissions while delivering superior efficiency per unit. Focusing on emissions intensity rather than total volume allows logistics managers to more accurately assess their supply chain environmental footprint.
A case study comparing May and July 2026 voyages found that emissions intensity per TEU was 1.12 tonnes compared to 1.23 tonnes, despite the May voyage producing higher absolute emissions. Efficiency is heavily tied to utilization, which ranged from 31% for least-efficient ships to 80% for the most efficient.
The players
VesselBot
A technology provider specializing in fuel-consumption modeling and shipment-level cargo data for the maritime industry.
The details
VesselBot calculates operational efficiency by using Well-to-Wake emissions modeling, which accounts for the entire lifecycle of the fuel used. The research reveals that vessels running at higher utilization rates distribute their emissions across more cargo, resulting in a lower carbon intensity per TEU despite higher absolute fuel burn. For operators, this means a ship emitting less in total can actually be less efficient if it carries significantly less freight.
Timeline
Q2 2026 marked the period for the industry average emissions intensity measurement.
May 2026 saw the first studied voyage between Bremerhaven and Norfolk.
July 2026 saw the second studied voyage between Bremerhaven and Norfolk.
Market Landscape
This analysis aligns with the industry-wide adoption of Well-to-Wake emissions accounting for global shipping. It marks a clear departure from simple total carbon reporting, which often masks the underlying efficiency gains achieved through higher vessel utilization.
Logistics managers should shift their procurement focus from total carbon estimates toward per-unit intensity metrics when evaluating shipping partners. When comparing carrier quotes, weigh the ship's expected utilization rate alongside price to determine the true operational and environmental cost.
The takeaway
Absolute carbon totals can lead to skewed decision-making by penalizing high-capacity, efficient logistics operations. Audit your current freight invoices to track TEU-kilometre intensity as a standard performance metric for your shipping partners.
Further reading
For broader trends in fleet decarbonization, view our Transportation coverage.
Source note: This article includes information reported by Container News.
Live Poll
Do you believe total emissions or emissions per unit of cargo is a better environmental measure?
