Moment-method update of KG when a weight is discharged - e.g., bunkers consumed, cargo discharged, ballast deballasted.
Formula
$$ KG_\text{new} = \frac{\Delta \cdot KG_\text{old} - w \cdot kg_w}{\Delta - w} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $KG_\text{old}$ | KG before removal | m | loading computer |
| $Δ$ | Initial displacement | t | loading computer |
| $w$ | Weight removed | t | manifest |
| $kg_w$ | Height above keel of removed weight | m | stow plan |
| $KG_\text{new}$ | New KG | m | result |
Sources
- Derrett & Barrass Ch.11.