Result
- Buoyancy swing
- 3.4 kg
- Gas breathed
- 2,784 l
- Full → empty
- —
Planning aid, not a dive computer. More
Metric (m, bar, L, kg) or imperial (ft, psi, cu ft, lb).
How it works
- The swing is the weight of the gas you breathe: the cylinder’s water volume times the pressure drop gives the gas breathed at the surface, and 1,000 l of air weigh about 1.2 kg. Add the maker’s empty-cylinder figure to see where it sits full and empty.
- A real cylinder holds slightly less than this ideal-gas sum at high pressure, so the swing is a touch generous.
- Negative sinks, positive floats.
The same calculations run in the Loggerfish app.