Cargo Reliquefaction Plant Daily Operation Log

This template covers the routine verification points for a cargo reliquefaction plant on LNG or LPG carriers. It typically includes compressor suction and discharge pressures, key temperatures, condenser seawater conditions, oil levels, safety device checks, and reconciliation against the ship's operating log. It is meant for daily shipboard use, not for overhaul or fault-diagnosis work.

Use it once per day as the name suggests, usually during the vessel's normal engineering rounds or at a fixed watch handover time. If operating conditions change, such as cargo transfer, abnormal temperatures, or a plant alarm, the log can be completed more frequently as a non-blocking verification record. Keep the recurrence tied to a clear daily cadence so entries are consistent.

A qualified marine engineer or the assigned duty engineer should complete it, with the DRI set to the person responsible for the cargo refrigeration plant on that watch. The checklist is operational, so it should be run by someone who can read the gauges, confirm the alarms, and escalate abnormalities immediately. If your vessel uses a handover process, the outgoing engineer can verify the log and the incoming engineer can review it.

Yes, as a supporting operational record, but it does not replace the vessel's required statutory logs, PMS records, or class documentation. It helps demonstrate routine monitoring aligned with SOLAS and the IGC Code by capturing the daily checks that operators are expected to perform. Use it alongside your ship's approved procedures and flag-state requirements.

The most common mistake is recording values without checking whether they are within the expected operating band or without noting an abnormal trend. Another pitfall is combining multiple checks into one vague line item, which makes it hard to verify what was actually done. Teams also sometimes skip log reconciliation, which can hide missing entries or mismatched readings between watches.

Yes. You can tailor the checklist items to the specific compressor arrangement, condenser setup, instrumentation, and alarm setpoints on your vessel. If your plant has additional sensors, interlocks, or standby equipment, add them as separate checklist items so each one can be answered yes, no, or N/A without ambiguity.

An ad-hoc notebook entry usually captures whatever the engineer remembers to write down, which makes it harder to compare day to day or prove that all required checks were performed. This template standardizes the sequence, reduces missed verification steps, and makes abnormal readings easier to spot during review. It also creates a cleaner handover trail for the next watch.

Yes, the template can be linked to maintenance workflows, alarm follow-up tasks, or shipboard reporting systems if your platform supports integrations. A failed verification step can trigger a blocking follow-up task for inspection or repair, while routine entries remain normal priority. That makes it easier to move from daily monitoring to corrective action without losing context.