Dive Gas Planner

Manifolded Double HP100 Planner

Use this for your primary working dive estimates.

Single HP100 Planner

Same workflow, single-cylinder gas volume.

Wet Notes Table Generator

Compact rows for manual transcription. Pick the configuration, then copy the numbers by hand.

Readable Table

Wet Notes Copy Block

Today’s Measurements

Enter PSI samples here. The app converts pressure use into SCR and updates the planner averages.

Conversion Math

Measurement Rows

Shearwater AI / GTR Alignment

Use this to reconcile the written plan with what your Shearwater is showing during the dive.

GTR Approximation

Shearwater model AI transmitter Config Current pressure psi Current depth ft Reserve pressure psi Shearwater SAC psi/min at surface Direct ascent rate ft/min

Teric Notes

How to Read GTR

This setup assumes a Swift AI transmitter without GPS, so the planner treats it as tank-pressure data only.
GTR is live feedback: time at the current depth until a direct ascent would surface with the reserve pressure remaining.
Shearwater bases GTR on current SAC, averaged over the last few minutes. In course terms, this is a pressure-based surface consumption number, not SCR volume.
GTR includes ascent gas, but not safety or decompression stops.
For decompression or multi-gas dives, use the written gas plan and team minimum gas; treat GTR as situational awareness.

Course terms: TEK ESSENTIALS - DIVE PLANNING, Gas Management terminology.

Shearwater terms: AI QuickStart Guide and Perdix AI support FAQ.

https://shearwater.com/pages/ai-quickstart-guide

https://shearwater.com/pages/perdix-ai-support