44
PRE DIVE PLANNING SEQUENCE
TM
The PDPS provides a sequence of theoretical dive times available
for depths ranging from 30 feet (9 meters) to 190 feet (57
meters) in 10 foot (3 meter) increments.
No decompression times (limits), or NDLs, are only displayed
for depths where there is at least 3 minutes of theoretical dive
time available at the depth, taking into account a descent rate of
60 feet (18 meters) per minute.
The PDPS should be reviewed prior to every dive to help you
plan your dive as required to avoid exceeding no decompres-
sion or oxygen exposure limits.
For repetitive dives, the PDPS indicates adjusted dive times that
are available for the next dive, based on residual nitrogen or
oxygen accumulation (whichever is in control) following the last
dive and surface interval.
WARNING: The available dive times provided by the
PDPS are only predictions. Depending on cylinder
size and air consumption rate, you may have less
time available than indicated because of those and
other factors.
NDLs at Sea Level
for an Air Dive
(no dive made yet)
Depth
NDL
feet (meters)
hours:mins
30 (9)
4:20 (4:43)
40 (12)
2:17 (2:24)
50 (15)
1:21 (1:25)
60 (18)
:57
(:59)
70 (21)
:40
(:41)
80 (24)
:30
(:32)
90 (27)
:24
(:25)
100 (30)
:19
(:20)
110 (33)
:16
(:17)
120 (36)
:13
(:14)
130 (39)
:11
(:11)
140 (42)
:09
(:09)
150 (45)
:08
(:08)
160 (48)
:07
(:07)
170 (51)
:07
(:06)
180 (54)
:06
(:06)
190 (57)
:05
(:05)
