Ⅵ No decompression limits
No decompression limits
When a diver has completed a dive,
and is ascending to the surface, the
speed at which a diver can ascend
to a surface, without stopping for
decompression, is decided
according to the diving depth and
diving time. These limits are
marked as no decompression limits
which are on the watchband, are
based on the U.S. Navy diving
manual (1985 edition).
(These are some models on which this is not printed.)
How to read no decompression limits
DEPTH m N.D. TIME
12m–––––––––200Min
15m–––––––––100Min
18m–––––––––60Min
21m–––––––––50Min
24m–––––––––40Min
27m–––––––––30Min
30m–––––––––25Min
33m–––––––––20Min
36m–––––––––15Min
39m–––––––––10Min
42m–––––––––10Min
45m–––––––––5Min
Example
If you dive deeper than 21m for more than 50mins,
or shorter, then according to this chart there is no
need to stop for decompression.
★ Caution
The no decompression limits is different depending
on body condition, or personal differences. Please
use the no decompression limits on this watch as
a guide line.
When a dive requires no decompression limits
make sure you follow a specialised diver’s manual.
Resistance to water
Check the chart to determine the water resistant
properties of this watch.
Moisture may build up on the glass surface inside
when the ambient temperature is lower than the
temperature inside the watch.
• Confirm that the crown is tightly
locked before use.
• Do not use the watch during
saturation diving.
This is a temporary condition and will not interfere
with the normal operation of the watch. Consult your
Citizen dealer should this condition persist for an
extended period.
