Every ship generates a significant amount of operational and performance data. When appropriate arrangements are in place, this data can support a range of activities, including vessel performance monitoring, voyage optimisation, weather routing, and other energy efficiency initiatives to the benefit of individual parties and the wider shipping industry.
BIMCO's Energy Efficiency Data Sharing Clause for Time Charter Parties 2025 provides a contractual framework that enables owners and charterers to share data, while also facilitating the involvement of authorised third party service providers where required.
This article sets out the case for incorporating the clause into time charter parties as good commercial practice, with particular attention to the role of the nominee and its significance for voyage optimisation and weather routing companies.
The data gap holding performance back
A standing problem in vessel performance, weather routing, and voyage optimisation is that recommendations often have to be made on the basis of incomplete information. Noon reports submitted once a day, speed and consumption estimates derived from contractual warranties, and weather data overlaid on approximate positions remain, in many cases, the operational reality.
Most vessels generate a continuous stream of high frequency sensor data, including shaft power and RPM, fuel flow rates, speed through water, draft, heading, and wind speed and direction, often sampled at short intervals. This data is logged, but without the right contractual framework in place, it rarely reaches the people who need it.
The BIMCO Energy Efficiency Data Sharing Clause 2025 addresses this gap.
What the clause does
At its core, the clause sets out a structured and legally sound mechanism for sharing onboard sensor data between owners, charterers, and their appointees, the term used in the clause for authorised third parties. This includes service providers such as weather routing companies, voyage optimisation platforms, performance monitoring providers, and energy management service firms.
The key features are as follows:
- Sensor access and installation. Charterers are granted the right to use sensors already fitted onboard the vessel. Where additional sensors are needed, charterers may require owners, at charterers' expense, to procure and install them during the charter period.
- Data rights for charterers and their appointees. Owners grant charterers, their affiliates, and their appointees the right to collect, use, and continue to use the data for monitoring, verifying, and optimising vessel and fleet performance, as well as for other energy efficiency purposes. Continued use is allowed deliberately, since data collected during a voyage supports future modelling, and removing it at the end of a charter would reduce its long-term value.
- Sharing with sub-charterers and their appointees. Subject to owner approval, which shall not be unreasonably withheld or delayed, charterers may also share data with sub charterers and their appointees. This gives the flexibility needed in more complex trading arrangements.
The role of the nominee
The clause uses the term appointees for authorised third parties engaged by charterers to process the data. In practice, this covers the weather routing companies, voyage optimisation platforms, performance monitoring providers, and energy management service firms mentioned above.
This distinction matters, for the following reasons.
What high frequency data enables
A voyage optimisation platform receiving high frequency sensor data from a properly instrumented vessel has access to multiple observations a day: speed through water, shaft power, fuel consumption rate, relative wind, sea state, and draft, all time stamped and synchronised.
With this data, a service provider can:
- Detect changes in vessel performance as they occur, rather than relying on a noon report after the fact
- Build and update vessel specific performance models that reflect actual loading conditions, trim, and sea state
- Provide recommendations based on the vessel's actual power to speed relationship at its current displacement
- Quantify fuel savings and emissions reductions to the level of detail required by increasingly rigorous reporting requirements
- Check their own meteorological and oceanographic data against what the vessel is experiencing, supporting continuous improvement of routing algorithms.
Without the clause, access to this data typically depends on informal arrangements, vessel specific technical integrations that may not survive a change of charter, or the willingness of the master to cooperate. With the clause in place, the nominee's access is contractually guaranteed, clearly defined in scope, and supported by mutual obligations on the part of both owner and charterer.
Conclusion
The BIMCO Energy Efficiency Data Sharing Clause for Time Charter Parties 2025 is a balanced and commercially practical instrument that addresses a genuine gap in how charter party relationships deal with vessel performance data.
For weather routing companies, voyage optimisation platforms, and performance management service providers, the effect is significant. Access to high frequency sensor data, contractually guaranteed and clearly structured, allows a service to advise on the basis of evidence rather than approximation.