OrcaLog decompression calculator using Bühlmann ZHL-16C algorithm. Input depth, time, gas mix, and surface interval to calculate your no-decompression limit and decompression stops.

ORCALOG · DECO
Bühlmann ZHL-16C · Offline
READY
Target depth
metres
Bottom time
minutes (0 = NDL only)
Surface interval
minutes (0 = first dive)
Prev. depth
metres (0 if none)
Gas mix
Air 21%
EAN32
EAN36
EAN40
EAN50
Custom
MOD (1.4 bar ppO₂) 56.7 m
▲ ppO₂ WARNING —
Enter parameters and calculate
Made on
Tilda