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 25.0m DESCENT DONE
...
1:00 25.0m NDL = 18 '
===================================

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

1:00 25.0m DESCENT DONE
...
11:00 25.0m NDL = 9 '
===================================

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

11:00 25.0m DESCENT DONE
...
16:00 25.0m NDL = 4 '
===================================

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

16:00 25.0m DESCENT DONE
...
17:00 25.0m NDL = 3 '
===================================

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

17:00 25.0m DESCENT DONE
...
18:00 25.0m NDL = 2 '
===================================

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

18:00 25.0m DESCENT DONE
...
19:00 25.0m NDL = 2 '
===================================

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

19:00 25.0m DESCENT DONE
...
20:00 25.0m NDL = 1 '