Reserve Buoyancy - Freeboard-based

Reserve buoyancy as a percentage of displacement - the volume above the load-water plane that provides resistance to flooding.

Reserve buoyancyFreeboardLoad Line

Hull volume to deck edgem³Displaced volumem³

Reserve volume: 18,000m³

Reserve buoyancy: 36.0%

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

RB = \frac{\nabla_{hull} - \nabla}{\nabla} \cdot 100\%

Symbol	Meaning	Unit
$\nabla_{hull}$	Volume up to weather deck	m³
$\nabla$	Displaced volume	m³

Source: Load Line Convention 1966/88

In short

Reserve buoyancy as a percentage of displacement - the volume above the load-water plane that provides resistance to flooding.

Learn the theory Intact stability