Draft Change from Density Change
Mean-draft change when entering water of different density - the core FWA / DWA relation, scaled for any density delta.
Draft change (sink+ / rise−)
16.6cm
Formula, assumptions, and limits
Moving from salt to fresh → sink; reverse → rise. Updates load-line mark reading at arrival for deballasting decisions.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Departure / arrival water density | kg/m³ | hydrometer | |
| Displacement | t | loading computer | |
| Tonnes per cm at current draft | t/cm | hydrostatics |