Bühlmann ZH-L16

Algorithmic Model ZH-L16 A/B/C

Overview

The Bühlmann ZH-L16 model describes inert gas exchange in 16 tissue compartments and serves as the basis for many dive computers.

ZH-L16 — Coefficients (B & C)

Coefficients published for the Bühlmann decompression model. Used by many computers (variants B/C).

Interpretation: 16 compartments (N₂ half-times), coefficients a and b defining the M-value (supersaturation tolerance) according to ambient pressure.

#	Half-time (min)	a (ZH-L16B)	b (ZH-L16B)	a (ZH-L16C)	b (ZH-L16C)
1	4.0	1.2599	0.5050	1.1696	0.5578
2	5.0	1.0000	0.6514	1.0000	0.6514
3	8.0	0.8618	0.7222	0.8618	0.7222
4	12.5	0.7562	0.7825	0.7562	0.7825
5	18.5	0.6667	0.8125	0.6667	0.8125
6	27.0	0.5933	0.8434	0.6160	0.8400
7	38.3	0.5282	0.8693	0.5710	0.8467
8	54.3	0.4701	0.8910	0.5271	0.8434
9	77.0	0.4187	0.9092	0.4935	0.8344
10	109.0	0.3798	0.9222	0.4611	0.8267
11	146.0	0.3497	0.9319	0.4410	0.8200
12	187.0	0.3223	0.9403	0.4180	0.8147
13	239.0	0.2971	0.9477	0.3950	0.8111
14	305.0	0.2737	0.9544	0.3750	0.8067
15	390.0	0.2523	0.9602	0.3500	0.8033
16	498.0	0.2327	0.9653	0.3295	0.8000