5554
[No decompression limits]
The range within which the diver can rise to the surface without rest for
decompression, is determined by the depth and elapsed time of the dive. The
ranges are called “No Decompression Limits”.
A table of “No Decompression Limits” compiled according to the U.S. Navy
Diving Manual (1993 edition) is printed on the watchband of this watch (there
are some models that have no print of the table on the watchband).
CAUTION
• The table of no decompression limits is provided for one-time diving.
• Since the no decompression limits differ depending on divers physical
condition and difference among individuals, use this table as a guideline only.
• In case of diving that requires the diver to take a rest for decompression
before rising to the surface, perform diving following a manual exclusively
compiled for diving.
— How to read no decompression limits —
DEPTH.m N.D.TIME
(Max. depth in meter) (No decompression time)
12m (40ft) . . . . . . . .200Min
15m (50ft) . . . . . . . .100Min
18m (60ft) . . . . . . . .60Min
21m (70ft) . . . . . . . .50Min
24m (80ft) . . . . . . . .40Min
27m (90ft) . . . . . . . .30Min
30m (100ft) . . . . . . .25Min
33m (110ft) . . . . . . .20Min
36m (120ft) . . . . . . .15Min
39m (130ft) . . . . . . .10Min
42m (140ft) . . . . . . .10Min
45m (150ft) . . . . . . . 5Min
Example: Read the
table as follows.
In case the maximum
diving depth is 21 m
(70 ft) and the elapsed
time is 50 minutes or
shorter, the diver is not
required to take a rest
for decompression while
rising to the surface.
No Decompression
Limits
