5
Chapter 5 Dive Tables and Dive Computers 59
WARNING: EVEN STRICT COMPLIANCE WITH
THESE TABLES WILL NOT GUARANTEE AVOIDANCE
OF DECOMPRESSION SICKNESS. CONSERVATIVE
USAGE IS STRONGLY RECOMMENDED.
RNT
+ADT
TNT
(USE THIS FIGURE TO DETERMINE
END-OF-DIVE LETTER GROUP.)
0.6
9
30
DIVE TIME REQUIRING DECOMPRESSION
MINUTES REQUIRED AT 15-FSW STOP (5-MSW) 00 00
35
1
30
4
A B C D E F G H I J K L M N O
0.8
15
50
TABLE 3 - REPETITIVE DIVE TIMETABLE
formatted and used as with the air table. If you need to
review the use of dive tables, you should revisit your basic
scuba text.
On the NAUI Nitrox Tables, Table 1 and Table 3
each have some additional information. They show the
oxygen partial pressure for each depth (a column to the
left on Table 1 and a top row on Table 3). Information
for dives that exceed a PO2 of 1.4 atmospheres is shaded
light green to make the planner aware that these dives
exceed the normal oxygen exposure limit for recreational
nitrox diving. The maximum depth on both tables is for a
PO2 of 1.6 ata. Therefore, the NAUI EAN36 Dive Tables
have a maximum depth of 33 meters (110 feet). The
NAUI Nitrox Dive Tables have a tolerance of ±1%. The
EAN32 Dive Tables can be used for nitrox blends from
31% to 33% oxygen; and the EAN36 Dive Tables, for
blends from 35% to 37% oxygen.
The usual dive table rules and precautions apply
when using the NAUI Nitrox Dive Tables.
• Treat each dive as a square profile dive, with the
deepest point reached on the dive being used as
the depth for the whole dive.
• If the exact depth or time does not appear on the
table, round up to the next greater number.
• The tables assume an ascent rate of 9 meters (30
feet) per minute.
• Planning repetitive dives progressively shallower
will yield shorter required surface interval times.
RNT
+ADT
TNT
(USE THIS FIGURE TO DETERMINE
END-OF-DIVE LETTER GROUP.)
SHADE INDICATES PO2 GREATER THAN
1.4 ATM OR O2 TIME LIMIT EXCEEDED
DIVE TIME REQUIRING DECOMPRESSION
MINUTES REQUIRED AT 15-FSW STOP (5-MSW) 00 00
0.9
15
50
• The required surface interval between two
separate dives is 10 minutes; the recommended
minimum surface interval is one hour.
• The tables are designed to be used at sea-level
atmospheric pressure, and adjustments must be
made for altitudes above about 300 meters (1000
feet).
• If flying or ascending to altitude after diving,
wait 12 hours after a single dive and 18 hours
after a series of repetitive dives.
Using NAUI’s prepared dive tables is one of
the easiest ways to plan dives. The three NAUI
standard tables – Air, EAN32, and EAN36 tables yield
interchangeable Letter Groups because they are based on
U.S. Navy Revision 7 Air tables utilizing equivalent air
depth (EAD) calculations.
If you are switching gases between dives, be sure to
utilize the Repetitive Dive Timetable (Table 3) for the
gas that will be used on that repetitive dive.
Another way to use different nitrox mixes is to
change from beginning with air to EAN32 or EAN36
and continue to use the air tables. It is important to
remember that any time you use enriched air mixtures,
you MUST properly track your oxygen exposure limits.
You can switch from initial use of EAN32 to EAN36
and continue to use the EAN32 table. NAUI RGBM
Tables enable you to switch mixtures and tables from
dive to dive.
21
779
34
766
48
752
63
737
79
721
98
702
118
682
141
659
167
633
198
602
237
563
286
514
354
446
465
0
0.7
12
40
18
282
28
272
39
261
51
249
63
237
77
223
92
208
108
192
126
174
146
154
168
132
194
106
224
76
260
0
SHADE INDICATES PO2 GREATER THAN
1.4 ATM OR O2 TIME LIMIT EXCEEDED
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
60
33
27
20
15
12
10
9
7
6
6
6
88
47
30
27
21
17
14
12
11
9
9
8
121
62
50
36
28
22
19
16
14
12
12
11
163
78
62
44
34
28
23
20
17
15
15
14
217
97
76
53
41
33
28
24
21
18
18
15
297
117
91
63
48
39
32
28
24
21
20
449
140
107
73
56
45
37
30
25
25
*
166
125
84
63
50
40
198
145
95
71
236
167
108
75
285
193
121
6
9
12
15
18
21
24
27
30
33
36
40
20
30
40
50
60
70
80
90
100
110
120
130
80
2
55
2
30
4
45
2
135
6
24:00
10:02
10:01
8:45
8:44
7:51
7:50
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
9:10
9:09
7:53
7:52
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
8:17
8:16
7:01
7:00
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
12:38
12:37
11:22
11:21
10:28
10:27
9:35
9:34
8:43
8:42
7:51
7:50
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
11:46
11:45
10:30
10:29
9:35
9:34
8:43
8:42
7:51
7:50
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
10:54
10:53
9:38
9:37
8:43
8:42
7:51
7:50
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
7:25
7:24
6:09
6:08
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
6:33
6:32
5:17
5:16
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
5:41
5:40
4:24
4:23
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
4:49
4:48
3:32
3:31
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
3:56
3:55
2:40
2:39
1:45
1:44
0:53
0:52
0:10
24:00
3:04
3:03
1:48
1:47
0:53
0:52
0:10
24:00
2:12
2:11
0:56
0:55
0:10
24:00
1:17
1:16
0:10
24:00
0:10
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
PO2
msw
fsw
9
41
14
36
19
31
24
26
29
21
35
15
40
10
46
4
50
0
11
64
17
58
23
52
29
46
35
40
42
33
49
26
57
18
65
10
73
2
75
0
0.5
6
20
1.0
21
70
0.9
18
60
13
117
21
109
29
101
37
93
45
85
55
75
64
66
74
56
85
45
97
33
109
21
122
8
130
0
1.1
24
80
1.2
27
90
1.3
30
100
1.4
33
110
1.5
36
120
1.6
40
130
8
32
12
28
16
24
20
20
25
15
29
11
34
6
39
1
40
0
7
23
10
20
14
16
18
12
22
8
25
5
29
1
30
0
6
19
9
16
12
13
16
9
19
6
22
3
25
0
5
20
8
17
11
14
14
11
17
8
20
5
23
2
25
0
5
15
8
12
11
9
14
6
17
3
20
0
5
10
87
10
5
13
2
15
0
NEW
GROUP
TABLE 2 - SURFACE INTERVAL TIME TABLE
LIGHT FACE / BLACK NUMBERS (TOP) ARE RESIDUAL NITROGEN TIMES (RNT)
BOLD FACE / RED NUMBERS (BOTTOM) ARE ADJUSTED NO-STOP REPETITIVE
DIVE TIMES. ACTUAL DIVE TIME SHOULD NOT EXCEED THIS NUMBER.
00
00
RESIDUAL NITROGEN TIME
ACTUAL DIVE TIME
TOTAL NITROGEN TIME
EAN 32 DIVE TABLE
USE ONLY WITH 32% OXYGEN ENRICHED AIR
TABLE 1 - END-OF-DIVE LETTER GROUP
START
DEPTH
msw fsw
MAXIMUM
NO-STOP TIME
00
20
5
25
3
© 2019 NAUI WORLDWIDE
#35502-32 (Rev. 07/19)
PO2
TIME RANGES IN HOURS : MINUTES
ENTER FROM THE TOP, MOVE DOWN TO FIND SURFACE INTERVAL TIME.
MOVE LEFT TO FIND THE NEXT PRESSURE GROUP.
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
36
20
17
12
9
7
6
5
4
4
4
3
354
223
465
260
130
* HIGHEST ATTAINABLE GROUP AT THIS
DEPTH REGARDLESS OF BOTTOM TIME
** RESIDUAL NITROGEN TIME (RNT)
EXCEPTION (see rule on reverse)
500
5
300
5
Figure 5-2 NAUI EAN32 Dive Tables
EAN 36 DIVE TABLE
USE ONLY WITH 36% OXYGEN ENRICHED AIR
TABLE 1 - END-OF-DIVE LETTER GROUP
WARNING: EVEN STRICT COMPLIANCE WITH
THESE TABLES WILL NOT GUARANTEE AVOIDANCE
OF DECOMPRESSION SICKNESS. CONSERVATIVE
USAGE IS STRONGLY RECOMMENDED.
RESIDUAL NITROGEN TIME
ACTUAL DIVE TIME
TOTAL NITROGEN TIME
MAXIMUM
NO-STOP TIME
00
NEW
GROUP
TABLE 2 - SURFACE INTERVAL TIME TABLE
LIGHT FACE / BLACK NUMBERS (TOP) ARE RESIDUAL NITROGEN TIMES (RNT)
BOLD FACE / RED NUMBERS (BOTTOM) ARE ADJUSTED NO-STOP REPETITIVE
DIVE TIMES. ACTUAL DIVE TIME SHOULD NOT EXCEED THIS NUMBER.
TIME RANGES IN HOURS : MINUTES
ENTER FROM THE TOP, MOVE DOWN TO FIND SURFACE INTERVAL TIME.
MOVE LEFT TO FIND THE NEXT PRESSURE GROUP.
TABLE 3 - REPETITIVE DIVE TIMETABLE
A B C D E F G H I J K L M N O
1.3
24
80
1.4
27
90
9
41
14
36
19
31
24
26
29
21
35
15
40
10
46
4
50
0
8
32
12
28
16
24
20
20
25
15
29
11
34
6
39
1
40
0
24:00
10:02
10:01
8:45
8:44
7:51
7:50
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
9:10
9:09
7:53
7:52
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
8:17
8:16
7:01
7:00
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
12:38
12:37
11:22
11:21
10:28
10:27
9:35
9:34
8:43
8:42
7:51
7:50
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
11:46
11:45
10:30
10:29
9:35
9:34
8:43
8:42
7:51
7:50
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
10:54
10:53
9:38
9:37
8:43
8:42
7:51
7:50
6:59
6:58
6:07
6:06
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
7:25
7:24
6:09
6:08
5:14
5:13
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
6:33
6:32
5:17
5:16
4:22
4:21
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
5:41
5:40
4:24
4:23
3:30
3:29
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
4:49
4:48
3:32
3:31
2:38
2:37
1:45
1:44
0:53
0:52
0:10
24:00
3:56
3:55
2:40
2:39
1:45
1:44
0:53
0:52
0:10
24:00
3:04
3:03
1:48
1:47
0:53
0:52
0:10
24:00
2:12
2:11
0:56
0:55
0:10
24:00
1:17
1:16
0:10
24:00
0:10
101
43
27
23
17
14
12
10
9
7
158
61
38
32
24
19
17
14
12
11
245
82
50
42
31
25
22
19
16
14
426
106
62
52
39
31
28
23
20
17
165
91
74
55
43
39
32
28
24
205
107
87
63
50
45
37
30
25
256
125
100
72
56
50
40
330
145
115
82
60
461
167
131
92
185
105
3
100
14
65
3
55
3
35
3
30
5
45
3
190
3
© 2019 NAUI WORLDWIDE
#35502-36 (Rev. 07/19)
PO2
msw
fsw
15
170
24
161
33
152
43
142
53
132
64
121
75
110
88
97
101
184
116
69
132
53
149
36
169
16
185
0
1.0
18
60
12
88
18
82
25
75
32
68
40
60
48
52
56
44
64
36
73
27
83
17
93
7
100
0
10
50
15
45
20
40
26
34
32
28
38
22
44
16
51
9
58
2
60
0
7
23
10
20
14
16
18
12
22
8
25
5
29
1
30
0
6
19
9
16
12
13
16
9
19
6
22
3
25
0
1.5
30
100
1.6
33
110
1.2
21
70
0.6
06
20
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
START
DEPTH
PO2 msw fsw
00
00
0.7
09
30
0.8
12
40
18
282
28
272
39
261
51
249
63
237
77
223
92
208
108
192
126
174
146
154
168
132
194
106
224
76
261
39
300
0
0.6
0.7
0.8
0.9
1.0
1.2
1.3
1.4
1.5
1.6
6
9
12
15
18
21
24
27
30
33
20
30
40
50
60
70
80
90
100
110
* HIGHEST ATTAINABLE GROUP AT THIS
DEPTH REGARDLESS OF BOTTOM TIME
** RESIDUAL NITROGEN TIME (RNT)
EXCEPTION (see rule on reverse)
57
26
17
14
11
8
7
6
5
4
223
168
260
300
3
*
133
76
63
46
37
33
28
24
21
*
193
148
100
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
Figure 5-3 NAUI EAN36 Dive Tables