Ask AI in the planner header opens Tunang beside the dive you are working on. A question can be about this dive rather than a hypothetical, and it asks for nothing it already has.
What it already knows
- Every level, with its depth and bottom time.
- Every gas, with its role, switch depth and ppO₂ limit.
- The decompression settings: algorithm, GF pair, last stop depth, stop spacing, water type, altitude, and closed-circuit setpoints.
- The results: maximum depth, runtime, time to surface (TTS), first stop, CNS and OTU.
- The computed ascent, segment by segment, with the gas at each.
- Every warning the plan is carrying.
Asking “what if”
“What would GF 25/60 do to this dive?”
The planner runs the dive again with that one thing altered, and returns a card carrying a schedule rather than an estimate.
Runtime and TTS carry their change against the plan you started from, beside maximum depth, first stop, CNS and every warning the dive holds. Tunang states the trade-off in words.
Three things can vary:
- Levels: a replacement set of depths and bottom times.
- GF Low and GF High: whole percentages.
- The three CCR setpoints: descent, working and deco in bar, on a closed-circuit plan only.
Everything else, the algorithm included, is inherited unchanged.
Apply to Plan writes the variation in; the previous version is kept first, so the change is reversible. A card for a whole dive carries Open in Planner, which loads and saves that plan. Read the schedule and the warnings against your own training and tables before using either: a card answers one question, it does not judge the dive.
What it will not do
- It cannot change gases. Asked about a different mix, it explains the consequence and asks you to change the setting yourself.
- One variation per question. A question containing three gets one computed, the rest discussed.
- It does not authorise anything. It is not a replacement for formal training, agency standards or dive judgement, and it must never say a dive is safe.
- It must not ignore a warning. It names the risk instead: the MOD of each gas against the depth it is breathed at, hypoxic gases at the surface, gas density at maximum depth, switch depths against MOD, CNS above 80 %, OTU above 300, a GF High above 90 or a GF Low below 20, and, on closed circuit, a diluent ppO₂ limit above 1.1 bar.
Next
Reviewing a plan is where a variation’s schedule is read; plan warnings are what it has to address.