CHAPTER 9 — Air Decompression
Change A 9-53
Table 9-6. Unlimited/No-Decompression Limits and Repetitive Group Designation Table for Unlimited/No-
Decompression Air Dives.
Depth
(feet/meters)
No-Decompression
Limits (min)
Group Designation
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
10
3.0
unlimited
60
120
210
300
797
*
15
4.6
unlimited
35
70
110
160
225
350
452
*
20
6.1
unlimited
25
50
75
100
135
180
240
325
390
917
*
25
7.6
595
20
35
55
75
100
125
160
195
245
315
361
540
595
30
9.1
405
15
30
45
60
75
95
120
145
170
205
250
310
344
405
35
10.7
310
5
15
25
40
50
60
80
100
120
140
160
190
220
270
310
40
12.2
200
5
15
25
30
40
50
70
80
100
110
130
150
170
200
50
15.2
100
10
15
25
30
40
50
60
70
80
90
100
60
18.2
60
10
15
20
25
30
40
50
55
60
70
21.3
50
5
10
15
20
30
35
40
45
50
80
24.4
40
5
10
15
20
25
30
35
40
90
27.4
30
5
10
12
15
20
25
30
100
30.5
25
5
7
10
15
20
22
25
110
33.5
20
5
10
13
15
20
120
36.6
15
5
10
12
15
130
39.6
10
5
8
10
140
42.7
10
5
7
10
150
45.7
5
5
160
48.8
5
5
170
51.8
5
5
180
54.8
5
5
190
59.9
5
5
* Highest repetitive group that can be achieved at this depth regardless of bottom time.
