Tonnes per centimetre (TPC) at any draft from waterplane-area ordinates using Simpson’s composite rule - the hydrostatic table entry for draft sensitivity.
Formula
$$ TPC = \frac{A_w \cdot \rho}{100000} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $A_w$ | Waterplane area (full) | m² | Simpson sum × 2 |
| $\rho$ | Water density | kg/m³ | hydrometer |
Sources
- Rawson & Tupper Vol 1 - Geometry.