I’ve seen many divers underestimate gas planning — even experienced ones. Not because they’re careless, but because recreational diving doesn’t require the same level of precision.
In Trimix and Tec training, I teach gas planning as a life-support calculation, not a suggestion.
I walk my divers through:
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minimum gas
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rock-bottom reserves
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emergency gas switch protocols
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breathing rate variability under stress
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how task-loading affects consumption
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why helium matters
There’s always a moment where someone looks at their SPG mid-drill and I can see it hit them:
“Ah… this is real.”
At depth — 60m, 70m, 80m — gas disappears faster than most divers intuitively grasp.
That’s why we plan slowly, carefully, and mathematically at the surface.
Technical diving isn’t about being fearless — it’s about being honest with physics and physiology… and planning accordingly.