ES-TRIN 2025/1 is the current edition of the European technical standard for inland navigation vessels, adopted by CESNI on 17 October 2024 and applicable since 1 January 2026 on EU waterways and the Rhine alike. The biggest changes cover electric propulsion, lithium-ion batteries, methanol as a fuel, and wheelhouses. Existing certificates stay valid.
What is ES-TRIN 2025/1 and when does it apply?
ES-TRIN 2025/1 is the 2025 edition of the European Standard laying down Technical Requirements for Inland Navigation vessels, the rulebook every inland vessel is inspected against for its certificate. CESNI, the European committee that maintains the standard, adopted it on 17 October 2024 (Resolution CESNI 2024-II-1) and recommended entry into force on 1 January 2026.
Two legal instruments then made it binding, one per regime. For EU waterways, Commission Delegated Regulation (EU) 2025/2177 of 9 September 2025 updated Annex II of Directive (EU) 2016/1629 so that "the technical requirements applicable to craft are those set out in ES-TRIN standard 2025/1", applicable from 1 January 2026. For the Rhine, CCNR Resolution 2024-II-14 updated the ES-TRIN reference in the Rhine Vessel Inspection Regulations (Rheinschiffsuntersuchungsordnung), also effective 1 January 2026. Both regimes therefore inspect against the same text, on the same date. How the two certificate systems relate is its own subject, covered in how the ES-TRIN inspection and certification process works.
CESNI revises the standard every two years, so 2025/1 replaced 2023/1 and a 2027 edition will follow. The changes below are the ones the CESNI explanatory notice of 10 April 2025 identifies as substantive.
What changed for electric propulsion and battery systems?
Chapter 11, the electric propulsion chapter, was rewritten. The headline relaxation: the old Article 11.01(2) demanded two electrical power sources for any electric propulsion system, and the new Article 11.01(2)(a) permits a single power source where the vessel has one propulsor, keeping the two-source rule for multi-propulsor systems. Monitoring and alarm requirements moved out of Chapter 11 into a new, technology-neutral Article 7.04(10) and (11) in the wheelhouse chapter, with alarm levels tied to a concrete operational test: enough remaining energy to steer away under the vessel's own power for at least 30 minutes. Day-trip passenger vessels may apply a shorter time under the new Article 19.15(13).
Battery rules tightened in Chapter 10. Article 10.11 now references EN 62619:2022 and EN 62620:2023 for lithium-ion accumulators, and a new paragraph 18 requires the manufacturer, serial number, type and installation date to be entered in item 52 of the vessel certificate. Two transitional deadlines matter for existing fleets:
| Installation | Deadline |
|---|---|
| Electric propulsion system installed between 1 January 2020 and 1 January 2026 | Must comply at least with Chapter 11 of ES-TRIN 2019/1 |
| Electric propulsion system on an existing vessel otherwise | N.R.C., no end date |
| Lithium-ion accumulators installed before 7 October 2018 | Must meet EN 62619 and EN 62620 at the latest on certificate renewal after 1 January 2028 |
If your fleet includes a hybrid or battery-electric vessel commissioned in the early 2020s, the middle row is the one to check: those systems are not grandfathered without condition.
What are the new rules for methanol and low-flashpoint fuels?
ES-TRIN 2025/1 makes methanol a regulated propulsion fuel for the first time. Chapter 30 already provided the framework for fuels with a flashpoint of 55 degrees C or below; the 2025/1 edition fills it in for methanol with two new chapters in Annex 8: one on methanol storage (tank arrangement, venting, piping, drip trays, ventilation, bunkering and fire safety, built on a secondary-barrier principle) and one on using methanol in internal combustion engines, which must follow either a gas-safe or a ventilated engine room concept. A new instruction, ESI-III-12, covers the arrangement of methanol fuel tanks, and Annex 4 now requires sketches marking hazardous areas on board.
The risk-assessment methodology in Article 30.04 was clarified, and a new "swappable tank" definition was added because CESNI wanted to anticipate future rules on compressed hydrogen. Hydrogen itself still has no dedicated chapter; it runs through the risk-assessment and derogation route. CESNI added no transitional provisions here, reasoning that few existing vessels burn alternative fuels. For operators planning a methanol newbuild or conversion, the practical point is that a defined approval path now exists where previously everything went through individual derogations.
What changed for wheelhouses?
The substantive work is in elevating and retractable wheelhouses, not radar navigation. Article 7.12 on elevating wheelhouses replaces the old proof-of-strength calculation with a general strength requirement, drops the proof-of-stability requirement, allows the roof opening to serve as an emergency exit if it meets the dimensions of Article 14.06(2), and secures access to the lifting mechanism with a no-entry marking and a detector that warns the wheelhouse. The five-yearly expert inspection of the lifting system was deleted; the annual check by a competent person stays.
Article 7.14 on retractable wheelhouses gains transitional provisions for the existing fleet for the first time, mostly N.R.C., with the roof-opening emergency exit due at the latest on certificate renewal after 1 January 2035.
Beyond that, the edition aligns terminology ("steering position designed for radar navigation by one person" replaces "wheelhouse designed for..."), points radar, Inland AIS and Inland ECDIS references at ES-RIS 2025/1, and adds Inland AIS installation requirements in Annex 5 that apply only to equipment installed after 1 January 2026.
Which transitional provisions cover existing vessels?
Chapters 32 and 33 decide when a new requirement actually reaches an existing vessel: Chapter 32 for craft navigating the Rhine (Zone R), Chapter 33 for craft operating only on waterways outside it. Most entries carry the marking N.R.C., meaning the provision applies only to newly built craft and to the replacement or conversion of the parts concerned. Replacing a part with one of the same technology and type does not count as replacement. An existing vessel can therefore sail on under the rules it was built to, indefinitely, for any requirement marked plain N.R.C.
The stricter pattern adds a deadline: "N.R.C., at the latest on renewal of the inland navigation vessel certificate after" a given date, with dates like 1 January 2035 and 1 January 2045 on the Rhine and 30 December 2049 outside it. The 2025/1 edition added new transitional entries for its own changes (Chapter 11, Article 7.12, 7.14, 10.11, 15.05, 18.01 and 19.02) and deleted entries that had expired. Reading your vessel's position in these tables is the single most useful preparation step before a renewal survey: it tells you which of the new rules will be checked and which will not.
Two smaller 2025/1 changes reach existing vessels the same way: sewage treatment plants need an operation manual and a sampling point at the latest on certificate renewal, and the Chapter 19 fire package for aluminium and fibre-reinforced plastic passenger vessels carries its own N.R.C. entries, covered in the fire protection chapter guide. Equipment rules also moved slightly: anchor connecting pieces such as swivels and shackles must now withstand a tensile load 20 percent above the breaking load of the chain, one of the Chapter 13 details in the safety equipment guide.
Does an existing certificate stay valid under 2025/1?
Yes. A Union inland navigation certificate or Rhine certificate issued under an earlier edition remains valid until the expiry date printed on it. Directive (EU) 2016/1629 sets the maximum validity at five years for passenger and high-speed vessels and ten years for all other craft, and Article 12(2) applies the transitional provisions at renewal. So the 2025/1 edition does not invalidate anything; it changes what the next periodical inspection (Untersuchung) is held against, filtered through Chapters 32 and 33.
The operational consequence is timing. A dry cargo vessel whose certificate runs to 2033 will not face the 2025/1 requirements until then, except where a deadline-type transitional provision or a conversion intervenes. A passenger vessel on a five-year cycle meets the new text sooner. Either way, the vessel's file, certificate dates, item 52 entries, battery data, attestation dates, is what the inspection body reads first.