Fresh-Water & Dock-Water Allowance
Fresh-Water Allowance (FWA) and Dock-Water Allowance (DWA) per Load Line Convention - the standard loaded-draft correction when crossing densities.
FWA
169mm
DWA for density
101.5mm
Formula, assumptions, and limits
FWA is extra draft permitted when loading in fresh water so that the ship arrives at salt-water Summer draft after consuming fuel/water. DWA interpolates for brackish.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Summer displacement | t | load-line certificate | |
| Tonnes per cm immersion (SW) | t/cm | hydrostatic tables | |
| Dock-water density | kg/m³ | hydrometer |