No-deco limits, decompression stops, nitrox and gas planning — Bühlmann ZH-L16C.
About this tool
Plans a dive's no-deco limit, ascent, and any required decompression stops using the Bühlmann ZH-L16C model — including nitrox, gas switches, and repetitive dives.
Enter depth, bottom time, gas mix and your gradient factors (conservatism).
The model tracks nitrogen loading across tissues and computes NDL, deco stops, and runtime.
Add tanks to plan gas use and switches; add dives for a repetitive series.
Planning aid only. This is not a substitute for proper training, dive tables, or a dive computer. Always dive within your certification and verify against your own computer.
SAC, GF & altitude are saved on this device for your next visit.
Dive 1
Zoom
Depth0–30 m
Time0–46 min
Click chart to add waypoint · Drag handles to adjust · ✕ badge or double-click to remove · Drag background to pan · Scroll to zoom both axes · Use sliders for per-axis fine-tuning
▸Edit points (3)
Dive profile (waypoints)
Time (min)
Depth (m)
Each row is a (time, depth) point on the dive profile. The engine fills in the ascent automatically.
Max depth
18 m
Bottom time
40 min
EAD
18 m
NDL
43 min
Runtime
46 min
Bottom gas
21%
MOD
57 m
ppO₂
0.59
CNS%
5.6%
OTU
9.7
Bottom · 21% O₂184 / 150 bar
Stops: 5m·3min (safety)
⚠ Not enough gas in one or more tanks for this plan.