In Da Mix

Reviewed 46m ago.

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• blend

  Step-by-step fill plan for blending nitrox, trimix, heliair or heliox into a scuba tank, from what is in it now to the mix and pressure wanted: how much helium and oxygen to add, the order, cooling waits, the O2 test, the air top-up, and booster bars. Partial pressure or continuous. Use for "how do I blend 18/45 to 220 bar", "how much O2 do I add for EAN32".

• gas_usage

  For one blend: the litres of each gas it takes from the banks, each bank's pressure afterwards, and whether a bank can still decant (or needs boosting, or runs short). Same inputs as blend, plus the banks. Use for "how much helium will this fill use", "is my O2 bank enough for this fill".

• fills_from_bank

  How many identical fills the source banks give before a bank can't supply the next one, and why it stops (bank down to the minimum pressure, or it can't decant high enough without a booster). Every tank is assumed to start the same (start_pressure / mix). Use for "how many tanks can I fill with NX32 from my 50 L O2 bank at 180 bar".

• top_up

  Top a tank up with a ready-made supply gas (air, EAN32, a trimix premix…): the pressure added, the mix you end up with, its MOD, and the gas density at a depth. Use for "I have 50 bar of EAN32 left, what do I get if I top up with air to 200".

• best_mix

  The best nitrox or trimix for a planned depth within the diver's limits: the richest O2 that keeps the ppO2 limit (rounded down), and for trimix the helium that keeps END and gas density within the limits. Use for "best nitrox for 30 m", "what trimix for 60 m with END 30".

• mod

  Maximum operating depth (MOD) of a breathing gas at a ppO2 limit, with END and EAD at that depth, the gas density there, and for hypoxic gases the minimum depth. Use for "what is the MOD of EAN32", "how deep can I take 18/45".

• list_methods

  The calculation methods (equations of state) In Da Mix offers, with their ids for the method input. The default is MULTIDECO_Z_FACTOR.