SEA CALCULATOR
FWA & DWA
Load-line allowance worksheet: fresh-water and dock-water allowance from displacement and TPC.
Example values — edit any field; results update as you type.
Displacement & TPC/TPI
t
Tonnes per centimetre immersion from stability data.
t/cm
Dock water
t/m³
Dock water between 1.000 (fresh) and 1.025 (sea).
m
Result
- FWA
- 211.11 mm (21.111 cm)
- DWA
- 84.44 mm (8.444 cm)
- Fresh to dock
- Vessel sinks 211.11 mm deeper from salt to fresh; may submerge summer load line by 84.44 mm (DWA).