Bühlmann ZH-L16C-1a 2002 with GRADIENT FACTOR decompression:
* GF_low (CF32) = 30 %
* GF_high (CF33) = 90 %
* deco offset (CF16) = 1.0 m
* last stop (CF29) = 3 m
* dive started at Pamb = 1013 mbar
* Gas switch delay (CF55) = 0 min

OC gas list:
* First gas#1 = 21/0

0:00 55.0m DESCENT DONE
...
1:00 55.0m NDL = 3 '
===================================

OC gas list:
* First gas#1 = 21/0

1:00 55.0m DESCENT DONE
...
2:00 55.0m NDL = 2 '
===================================

OC gas list:
* First gas#1 = 21/0

2:00 55.0m DESCENT DONE
...
3:00 55.0m NDL = 1 '
===================================

OC gas list:
* First gas#1 = 21/0

3:00 55.0m DESCENT DONE
...
4:02 55.0m Deco:

TTS = 7 '
CNS = 6%