Citizen 2502 Instruction Manual page 11

No Decompression Limits, based on the American Navy Diving Manual (1983),
are printed on the band of this watch. (Some models may not have this chart.)
<Reading the chart>
DEPTH. m - -N.D. TIME
12 m - - - - - - - 200 Min.
15 m - - - - - - - 100 Min.
18 m - - - - - - - - 60 Min.
21 m - - - - - - - - 50 Min.
24 m - - - - - - - - 40 Min.
27 m - - - - - - - - 30 Min.
30 m - - - - - - - - 25 Min.
33 m - - - - - - - - 20 Min.
36 m - - - - - - - - 15 Min.
39 m - - - - - - - - 10 Min.
42 m - - - - - - - - 10 Min.
45 m - - - - - - - - - 5 Min.
Caution: The no decompression limit is
different depending on body condition,
or personal differences. Please use the
no decompression limits on this watch
as a guideline.
When a dive requires no decompression
limits make sure you follow a specialized
divers manual.
Example: If the diver is at 21 meters for
50 minutes or less, then it is OK to
surface without stopping to decompress.
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