Reserve Buoyancy - Freeboard-based
Reserve buoyancy as a percentage of displacement - the volume above the load-water plane that provides resistance to flooding.
Reserve volume
18,000m³
Reserve buoyancy
36.0%
Formula, assumptions, and limits
Passenger ships typically > 50 %, cargo ships 25–40 %, tankers 15–25 % at Summer load line. Reserve buoyancy drops in damage scenarios - SDB (subdivision draft) sets minimum.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Volume up to weather deck | m³ | capacity plan | |
| Displaced volume | m³ | hydrostatics |