NOx technical files, engine parameters and emission-control records
What is being checked
The inspector is checking whether documents and records required by MARPOL Annex VI Regulation 13 and the NOx Technical Code are complete and match the engines and emission-control arrangements onboard.
Ready onboard
0/7 completePractice questions
Answer aloud, then open the preparation point.
1Which engines require Technical Files, and how do you verify that each file belongs to the fitted engine?
Match the IAPP Supplement, engine identity and EIAPP documentation to the approved Technical File and onboard configuration.
2What changes must be entered in the Record Book of Engine Parameters?
Record adjustments, component replacements or settings covered by the approved parameter-check method, with identity and authorisation as required.
3How is compliance managed when entering a NOx Emission Control Area?
Confirm applicability, place each relevant engine or abatement system in the required compliant state and record the transition at the prescribed position and time.
4What is the immediate response if the NOx abatement system cannot be restored promptly?
Follow the approved failure procedure, assess compliance, notify the Master and company, make required flag or coastal-State reports and preserve the defect record.
5How do you demonstrate that SCR catalyst condition or EGR performance is being monitored?
Show the approved monitoring method, trends or spot checks, maintenance criteria, consumables and corrective records for the fitted system.
Where an observation may arise
A required Technical File or EIAPP-related document is missing or does not match the fitted engine.
Engine parameter changes are unrecorded, outside approved limits or unsupported by component identification.
Required tier transition records are absent or a non-compliant engine state was used in an applicable NECA.
The responsible engineer cannot explain system operation, monitoring or failure action.
SCR monitoring, EGR bleed-off or residue-disposal records are missing or inconsistent.
A NOx-critical component, setting or system has been altered without approved documentation.
Master's practical note
Select one Annex VI engine and trace its identity from the IAPP Supplement and Technical File to the actual component markings, parameter record and latest maintenance. Paperwork that cannot be tied to the fitted engine is weak evidence.
Equipment boundary and references
Equipment boundary: Engine-specific compliance depends on build date, power, certification, applicable NECA and the approved NOx method. Use the vessel's IAPP Supplement, Technical Files and flag guidance.
References
- OCIMF SIRE 2.0 Question Library Part 1, Version 1.0, Question 6.1.6
- MARPOL Annex VI Regulation 13
- NOx Technical Code 2008, as amended
- International Air Pollution Prevention Certificate and Supplement
Last reviewed: 2026-09-08
