Instruction manual

No decompression limits
The range of time when it is unnecessary to stop to decompress while
surfacing from a dive is determined by the depth and time of the dive.
These values are referred to as “No Decompression Limits.” Use these as
estimates when diving.
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.
53
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.
O. Other functions
Register ring
Use the register ring to measure elapsed time.
<Using the register ring>
Before diving, rotate the register ring to
line up the mark with the minute
hand. Elapsed time is then indicated by
the position of the minute hand on the
register ring.
Example: In the diagram at left the minute
hand is 10 minutes past the mark,
indicating that 10 minutes have elapsed.
- NOTE -
The register ring may only be turned
counter clockwise (this helps prevent
unwanted movement). Do not attempt to
force it to turn clockwise.
52
50
40
30
20
10
30
N.D.LIMITS
DEPTH.M N.D.TIME
12
15
18
21
24
27
200
100
60
50
40
30
30
33
36
39
42
45
25
20
15
10
10
5
Elapsed time
is 10 minutes