Every warning the planner produces lives in one place: a chip in the page header, labelled with the count (3 Warnings, 1 Warning). It appears only when there is something to say, and its colour is the worst severity in the set: amber for Warnings, red if anything is an Error.
Selecting it opens the Dive Warnings dialogue, which lists each message in full. A message belonging to a moment in the dive carries that moment in parentheses, (t=42 min), so you can find it in the schedule.
Dive Warnings
That plan is 60 m for 25 minutes on air, with 100 % oxygen breathed from 21 m. On a clean plan there is no chip, and the dialogue reads “No warnings. Dive plan looks good!”
Warning and Error
The two severities differ in certainty, not in how bad the outcome is.
- Warning: the plan is outside a customary limit, and the schedule is computed and internally consistent. An ascent rate above the customary figure, ppO₂ above the 1.4 bar bottom limit, CNS above the 80 % advisory, OTU above 200, gas density above the 5.2 g/L advisory.
- Error: the planner could not do what was asked, or the plan crosses a hard limit. ppO₂ above the absolute 1.6 bar ceiling, CNS above 100 %, OTU above the 300 single-dive limit, gas density above the 6.2 g/L limit, an isobaric-counterdiffusion violation at a gas switch, or a decompression obligation that never clears at the current gradient factors and gas.
Most warnings have an input behind them: a rate, a gas, a switch depth, a gradient factor. The planner does not let you raise a limit to silence one. Ask AI, beside the chip, opens the assistant, which will replan the dive with one of those inputs changed. The same severities and limits apply wherever the app judges a gas, as on Depth limits.
The ones that block the plan
A few conditions stop the Plan step advancing to Review at all. The forward control is disabled and states the reason:
- A closed-circuit plan with no onboard diluent. “CCR mode requires an Onboard Diluent gas to be configured.”
- An open-circuit plan with no bottom gas. “Open circuit mode requires a Bottom Gas to be configured.”
- An open-circuit plan whose gases do not reach the bottom. “No gas can be breathed at the plan’s maximum depth (45 m). Adjust your mixes or the depth.”
The last also appears as a red banner in the Gas Mixes section, under the cards. All three are fixed in the Gas Mixes section.
A closed-circuit plan carrying no open-circuit bailout that reaches the bottom is told so - “No open-circuit bailout reaches 45 m.” - but is not blocked. Carrying bailout is a decision about your own redundancy, and a diver on two independent rebreathers carries none.
Warnings on a scenario
The count carries the dive as planned. Select a bailout, a loss-of-deco, an O₂ failure or an overrun scenario on the Review step and the list swaps onto that scenario’s own warnings, the way the schedule and the gas figures already follow the selection.
A scenario’s message names the scenario first - OC bailout plan (50%, from 55 m at 20 min) does not have enough gas - 50% short by 254 L (36 bar) - so it is never read as a message about the dive you intend to make. It can name cylinders you are not carrying on that dive. An overrun’s findings carry its numbers the same way: Overrun +5 min / +3 m - …. See Bailout scenarios.
Next
Finalizing and sharing, and Reference: warnings for the complete catalogue.