KG change when an existing weight is moved vertically - e.g., lowering a lifeboat, moving cargo from under-deck to deck.
Formula
$$ KG_\text{new} = KG_\text{old} + \frac{w \cdot \Delta h}{\Delta} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $KG_\text{old}$ | Initial KG | m | loading computer |
| $w$ | Weight shifted | t | manifest |
| $\Delta h$ | Vertical shift (positive up) | m | stow plan |
| $Δ$ | Displacement | t | loading computer |
| $KG_\text{new}$ | New KG | m | result |
Sources
- Derrett & Barrass Ch.11.