CHAPTER 17 — Closed-Circuit Mixed-Gas UBA Diving
17-27
Table 17-9. No-Decompression Limits and Repetitive Group Designation Table for 0.7 ata Constant
Partial Pressure Oxygen in Nitrogen Dives.
Repetitive Group Designation
Depth
No-Decompression
Limits (min)
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
Z
10
Unlimited
720
20
720
154
423
720
30
720
31
50
73
98
128
165
211
273
373
634
720
40
367
17
27
38
50
63
76
91
107
125
144
167
192
222
258
304
367
50
143
12
19
26
34
42
50
59
68
78
88
99
111
123
137
143
60
74
9
14
20
25
31
37
43
50
57
64
71
74
70
51
7
11
16
20
25
30
34
39
45
50
51
80
39
6
10
13
17
21
25
29
33
37
39
90
32
5
8
11
14
18
21
24
28
31
32
100
27
5
7
10
13
15
18
21
24
27
110
24
4
6
9
11
14
16
19
21
24
120
19
4
6
8
10
12
15
17
19
130
16
3
5
7
9
11
13
15
16
140
13
3
5
7
8
10
12
13
150
11
3
4
6
8
9
11
Limit Line
160
9
3
4
6
7
9
170
8
3
4
5
7
8
