What needs to be clarified
Check whether recorded ballast and stores changes between draught observations were included, and identify which parts of the cargo-mass calculation depend on unsupported assumptions.
Materials to prepare
- Draught observation sheets with times and recording conditions
- Ballast operation book and individual tank level records
- Cargo calculation, vessel tables and stores-change records
What to compare
Compare observation times with operations, tank designations and units. Separate internal transfers from intake or overboard discharge. Check consistent stores, water-density and vessel-attitude inputs; do not automatically attribute an unaccounted ballast change to loaded cargo in the recalculation.
Possible outcome of the analysis
The review may provide a comparison of vessel states, check the documented balance of changes and list assumptions affecting the cargo-mass conclusion in the supplied draught calculation.
Limits of the conclusions
The review is not a vessel survey and does not confirm permissible loading. Unknown volumes cannot be replaced with confident calculated figures without consistent observations and tank records.