This section establishes the fundamental vessel and voyage parameters. All fields marked mandatory must be completed to ensure proper traceability and regulatory compliance under IMO guidelines.
Vessel IMO Number
Vessel Official Name
Voyage Number/Identifier
Port of Departure
Port of Destination
Current Log Entry Timestamp (UTC)
Chief Engineer Full Name
Officer on Duty Full Name & Rank
Voyage Leg Identifier
Primary Cargo Type on Board
Containerized Cargo
Bulk Cargo
Liquid Bulk (Tanker)
General Cargo
Vehicles/RoRo
Refrigerated Cargo
Hazardous Materials
Mixed Cargo
Vessel Gross Tonnage (GT)
Main Engine Manufacturer & Model
Fuel Type BEFORE Transition
Heavy Fuel Oil (HFO)
Very Low Sulfur Fuel Oil (VLSFO)
Ultra Low Sulfur Fuel Oil (ULSFO)
Marine Diesel Oil (MDO)
Marine Gas Oil (MGO)
Liquefied Natural Gas (LNG)
Methanol
Ethanol
Ammonia
Hydrogen
Liquefied Petroleum Gas (LPG)
Biofuel Blend
Intended Alternative Fuel Type AFTER Transition
Liquefied Natural Gas (LNG)
Methanol
Ethanol
Ammonia
Hydrogen
Liquefied Petroleum Gas (LPG)
Biofuel Blend
Synthetic Fuel
Other Zero-Carbon Fuel
Date of Last Bunkering for New Alternative Fuel
Bunkering Port for Alternative Fuel
Document the precise operational parameters during the fuel transition phase. This technical data is critical for engine performance analysis, warranty compliance, and future optimization of fuel switching protocols.
Fuel Switch Initiation Timestamp (UTC)
Fuel Switch Completion Timestamp (UTC)
Engine Load Immediately BEFORE Switch (%)
Engine Load Immediately AFTER Switch (%)
Main Engine RPM BEFORE Switch
Main Engine RPM AFTER Switch
Fuel Injection Pressure BEFORE Switch (bar)
Fuel Injection Pressure AFTER Switch (bar)
Scavenge Air Pressure BEFORE Switch (bar)
Scavenge Air Pressure AFTER Switch (bar)
Exhaust Gas Temperature BEFORE Switch (°C)
Exhaust Gas Temperature AFTER Switch (°C)
Alternative Fuel Flow Rate After Stabilization (kg/h)
Total Fuel Switch Duration (minutes)
Was the fuel transition completed without engine shutdown or load reduction below 50%?
Engine Control Mode During Transition
Full Automatic (ECU Controlled)
Semi-Automatic
Manual Control
Emergency Manual Override
Were all backup fuel systems and emergency power systems operational throughout the transition?
Did turbocharger speed fluctuate beyond ±5% of nominal during transition?
Additional Engine Performance Observations or Deviations from Standard Parameters
Capture comprehensive emissions data to demonstrate compliance with IMO MARPOL Annex VI and EU MRV regulations. Accurate logging is essential for Carbon Intensity Indicator (CII) calculations and environmental certification.
CO2 Concentration - 15 min BEFORE switch (ppm)
CO2 Concentration - DURING switch peak (ppm)
CO2 Concentration - 30 min AFTER stabilization (ppm)
SOx Concentration BEFORE switch (ppm)
SOx Concentration AFTER switch (ppm)
NOx Concentration BEFORE switch (ppm)
NOx Concentration AFTER switch (ppm)
Particulate Matter (PM) BEFORE switch (mg/m³)
Particulate Matter (PM) AFTER switch (mg/m³)
Does your vessel's alternative fuel system produce measurable methane slip (CH4)?
Was a physical fuel sample extracted during the transition period?
Fuel Sample Extraction Timestamp (if applicable)
Fuel Sample Extraction Location (Tank/Line)
Is laboratory analysis of the fuel sample required for regulatory compliance?
Did any emissions parameter exceed normal operational baseline by more than 10% during transition?
Was the Continuous Emissions Monitoring System (CEMS) fully operational throughout the transition?
Were any emissions alarms or IMO-DCS alerts triggered during the fuel switch?
Additional Emissions-Related Observations or Environmental Notes
Comprehensive safety verification is mandatory before, during, and after fuel transitions to prevent fire, explosion, toxicity, and environmental hazards. This checklist ensures compliance with IGF Code, ISM Code, and SOLAS requirements for alternative fuel systems.
Alternative Fuel Storage Tank Pressure Reading (bar)
Alternative Fuel Storage Tank Temperature (°C)
Is the alternative fuel stored at cryogenic temperatures (below -100°C)?
Alternative Fuel Tank Level (%)
Has fuel quality been verified through onboard testing (density, viscosity, water content)?
Are all fuel system seals, gaskets, and double-wall piping integrity verified leak-free?
Is the fixed gas detection system operational and showing zero alarms in all fuel handling spaces?
Is the hazardous area ventilation system running at 100% capacity with confirmed air changes?
Have all fuel system safety valves and pressure relief devices been tested within the last 7 days?
Is the fixed fire suppression system (CO2, water mist, dry chemical) fully armed and ready for fuel system spaces?
Has the emergency fuel shut-down (ESD) system been functionally tested within 24 hours prior to transition?
Are all crew members involved in the fuel transition certified and current in alternative fuel handling training?
Is the Material Safety Data Sheet (MSDS) for the alternative fuel readily accessible to all relevant crew?
Are spill containment and vapor dispersion equipment positioned and ready for immediate deployment?
Has the fuel transfer and piping system been properly purged of previous fuel to prevent cross-contamination?
Are there any outstanding safety observations or non-conformities from the pre-transition safety meeting?
Rate the operational readiness of critical safety systems immediately prior to fuel transition:
Not Ready | Marginal | Ready with Concerns | Fully Ready | Exceeds Standard | |
|---|---|---|---|---|---|
Tank Level Monitoring System | |||||
Tank Pressure Monitoring System | |||||
Tank Temperature Monitoring System | |||||
Inert Gas System (if applicable) | |||||
Hazardous Area Electrical Equipment | |||||
Fuel Valve Remote Operation | |||||
Bilge System in Fuel Spaces | |||||
Emergency Communication Systems |
Final verification and certification by the Chief Engineer ensures all data is accurate, procedures were followed, and regulatory compliance is achieved. This section forms the official record for flag state, classification society, and port state control inspections.
Has the Chief Engineer personally verified all data in Sections 1-4 for accuracy and completeness?
Has this fuel transition been officially recorded in the vessel's Oil Record Book Part I (Machinery Space Operations) or IGF Code Log?
Is this fuel transition compliant with MARPOL Annex VI Regulation 14 (Sulfur Oxides) and Regulation 18 (Fuel Oil Quality)?
Has the Ship Energy Efficiency Management Plan (SEEMP) Part I been updated to reflect this alternative fuel usage?
Were there any deviations from the company's approved Fuel Changeover Procedure (FCP) during this transition?
Has the company technical department and vessel operations center been notified of the successful fuel transition?
Is notification to the next port state authority required under local regulations for alternative fuel use?
Are all supporting documents (fuel delivery notes, lab certificates, engine parameters printouts) attached to this log?
Select all applicable IMO instruments and codes complied with during this transition:
MARPOL Annex VI
IGF Code (International Code of Safety for Ships using Gases)
ISM Code (Safety Management System)
NOx Technical Code
EU MRV Regulation
IMO Data Collection System (DCS)
Flag State Specific Requirements
Classification Society Rules
Chief Engineer Additional Comments and Overall Assessment of Fuel Transition Operation
Upload Supporting Documentation (Fuel Delivery Notes, Bunker Sample Certificates, Engine Performance Graphs, Emissions Data Exports, Safety Checklist Photos)
Upload Photographic Evidence (Fuel System Gauges, Engine Control Room Display, Safety System Status Panels)
Chief Engineer Digital Signature - Certifying Accuracy of All Logged Information
Chief Engineer Sign-Off Timestamp (UTC)
Chief Engineer License/Certificate Number
Issuing Authority of Chief Engineer Certificate