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56
Fig. 38 – No-decompression
limits – DataMax Pro
vs. U.S. Navy Tables
Depth DataMax U.S.
Pro-E Navy
feet mins. mins.
30 260 – –
35 – – 310
40 136 200
50 78 100
60 55 60
70 40 50
80 31 40
90 25 30
100 20 25
110 17 20
120 13 15
130 11 10
140 9 10
150 8 5
160 7 5
170 ––* 5
180 ––* 5
190 ––* 5
* The Pre Dive Planning Sequence will not
scroll past 160 feet, or when projected bottom
/descent time is less than one minute.
NO DECOMPRESSION LIMITS
The no-decompression limits for the DataMax Pro are contrasted with the
U.S. Navy limits at left (Fig. 38). You will notice that at all but two depths,
the DataMax Pro provides less time than the U.S. Navy Tables. In those two
cases, the times are within one minute. Though the DataMax Pro no-decom-
pression limits may be less than the U.S. Navy, you will receive greatly
increased allowable bottom times if you follow a multi-level dive profile.
MAXIMUM NO-DECOMPRESSION DIVE PROFILE
Many people ask, “Just how deep can I go, and how long can I stay, with the
DataMax Pro?” Of course the answer depends on many factors including air
supply, previous dives made, etc. Assume for a minute that no previous dives
were made, and that the diver had an unlimited air supply. Figure 39 on the
next page shows the maximum no-decompression dive profile that is possible
with the DataMax Pro on a first dive. In this test, the DataMax Pro was
taken to a depth where the No-decompression Dive Time Remaining reached
zero minutes. It then ascended to a depth that gave it one more minute of
no-decompression time. When the no-decompression time reached zero at
this new depth, the DataMax Pro was taken to the next shallower depth.
This continued until 33 feet, where there was obviously more no-decompres-
sion time available than possible air time with even the largest scuba tank. A
safety stop was added as a precaution to round out this simulated dive.
60


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