In today’s evolving maritime landscape, EEXI compliance is non-negotiable. Many vessels now use power limitation solutions such as EPL (Engine Power Limitation) or ShaPoLi (Shaft Power Limitation). However, technical measures alone are not enough. To stay compliant and maintain operational efficiency, you must also keep all related documentation accurate, consistent and up to date.
🛠️ Why Proper Documentation Matters
Clear and compliant records support statutory compliance and strengthen operational safety. Moreover, correct documentation gives crews and pilots reliable information for safe manoeuvring and efficient operations. As a result, you reduce uncertainty during port approaches, restricted waters and demanding manoeuvres.
🔍 Key Insights on Power Limitation Solutions
EPL & ShaPoLi (Overridable Limitations)
Overridable limitations allow temporary bypass under defined conditions. Limits may rely on mechanical fuel rack restrictions or software controls. Therefore, vessels must document these measures in the Onboard Monitoring Manual (OMM). The EEXI verifier must review and approve the OMM as part of the compliance package.
Permanent Power Limitation
Permanent limitations cannot be overridden by the crew. They keep propulsion consistently within the defined operating range and often accompany propeller retrofits or turbocharger adjustments. In this case, the vessel should maintain an accurate permanent limitation report and ensure the EEXI Technical File reflects the updated configuration. Consequently, the documentation should replace any obsolete OMM versions that no longer apply.
Engine Derating
Engine derating reduces engine power through technical modifications such as cylinder cut-out or bore adjustments. Because these changes affect emissions certification, you must update the NOx Technical File and, where applicable, the IAPP certification records accordingly.
📋 Manoeuvring Information Updates
Power limitations can affect manoeuvrability. For this reason, the vessel should update wheelhouse posters and manoeuvring information, and conduct trials where required to confirm the new performance characteristics. Additionally, pilots rely on accurate data to plan and execute safe manoeuvres in real operating conditions.
💡 Practical Recommendations
- Always keep the current OMM (or the permanent limitation report) on board and readily available.
- Update manoeuvring information to reflect the modified propulsion characteristics.
- After a propeller retrofit, remove outdated documentation based on previous power reserves and performance assumptions.
🔗 Looking for Expert Support?
If you need practical, vessel-specific guidance on EEXI compliance, documentation alignment and operational impacts, Marine Surveyor Consultant can support you with tailored advisory and verification readiness assistance.
🌊 Navigating EEXI requirements can be complex. We help you translate technical changes into compliant documentation and operational clarity.
