Hand-author how a training fire grows and how it burns down over the drill clock, then scrub to preview it — a replayed timeline, never a computed fire.
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A growth ramp lets a training officer hand-draw how one fire changes over a drill — when it grows, when the knockdown starts, when it's out — so the fire plays back the same way every time you scrub the drill clock.
Growth ramps are reachable only on a training incident, on its synthetic drill clock. On a real incident there's nothing to open: a condition holds whatever severity you painted, and nothing grows or dies down on its own between your updates.
Paint a fire or smoke condition first, with the Conditions tool. Then, in the Conditions panel, find Growth ramps (training) — a list of every fire and smoke cell you've placed. Pick the one you want and expand Growth ramp (training) on its row.
A ramp is an ordered list of keyframes: a time, a stage, and the severity that stage renders at. The four stages, in order, are Incipient, Growth, Fully developed, and Through the roof. The first keyframe you add can only be Incipient or Growth — a fire cannot begin as an inferno. It has to evolve into one across the timeline you draw.
Add keyframe drops a new keyframe at the drill clock's current position, holding the previous stage; pick its stage from the chip row underneath. Scrub preview moves the drill clock so you can see the ramp play out on the map, floor plan, and 3D scene as you drag it.
Add knockdown appends a descending tail to the ramp — one rung per stage, evenly spread — from wherever the fire currently sits down to Incipient, over a band you set from 30 to 120 seconds. The descending rungs keep the same stage color as always and add a diagonal stripe pattern, so a knockdown reads as "a lower stage than the one before it," never as a different kind of marker. Hover a rung and its tooltip says (knockdown).
Replay shows the ramp exactly as you drew it — a timeline the instructor authored, played back, not a fire the app computed. A ramp is inert outside training: even a ramp copied onto a real incident does nothing there, because growth ramps only replay against a training incident's synthetic clock.
Suppression flow rate — gallons per minute per hoseline assignment — is a department-wide default an admin can set under Admin → Preferences → Hoseline flow rates.