This means, from 1 May 2026, all EEDI-relevant speed trials must be conducted according to either:
- ISO 15016:2025 – Specifications for the Assessment of Speed and Power Performance by Analysis of Speed Trial Data (Note: ISO 15016:2015 will no longer be valid).
Or: - ITTC Recommended Procedure 7.5-04-01-01.1 – Preparation, Conduct and Analysis of Speed/Power Trials, 2024 (Note: this supersedes the 2017, 2021 or 2022 versions).
The amendments to the ISO standard and ITTC procedure update the requirements in MEPC.403(83) in relation to:
- Sea conditions
- Ship speed
- Development of power curves based on the measured ship speed and the measured output of the main engine.
Attained EEDI
EEDI is required to be calculated in accordance with MARPOL Annex VI, Regulation 22 and requires a survey. The amendments to the 2022 Guidelines impact the way the initial survey or additional survey required by MARPOL Annex VI, Regulation 5 is conducted and verified.
What shipowners and shipyards should do now
Please ensure that speed trials taking place for the survey and certification of EEDI from 1 May 2026 are in accordance with the requirements of the latest ISO standard or ITTC procedure. Also take into account any additional or alternative requirements of the ship’s flag Administration.
How Lloyd’s Register can help
Our advisory services can assist you in preparing for compliance with these new sea trial requirements.
For further information
If you would like to know more or need support with these requirements, please contact Lloyd’s Register Global Technical Client Care via TechnicalExperts@lr.org.
