CHAPTER 9 Air Decompression
Change A 9-57
* See No Decompression Table for repetitive groups
** Repetitive dives may not follow exceptional exposure dives
Table 9-8. U.S. Navy Standard Air Decompression Table (Continued).
Bottom
time
(min)
Time
first stop
(min:sec)
Decompression stops (feet/meters)
Total
decompression
time
(min:sec)
Repetitive
group
Depth
feet/meters
50
15.2
40
12.1
30
9.1
20
6.0
10
3.0
110
33.1
20
0
3:40
*
25
3:20
3
6:40
H
30
3:20
7
10:40
J
40
3:00
2
21
26:40
L
50
3:00
8
26
37:40
M
60
3:00
18
36
57:40
N
70
2:40
1
23
48
75:40
O
80
2:40
7
23
57
90:40
Z
90
2:40
12
30
64
109:40
Z
100
2:40
15
37
72
127:40
Z
Depth
feet/meters
Bottom
time
(min)
Time
first stop
(min:sec)
Decompression stops (feet/meters)
Total
decompression
time
(min:sec)
Repetitive
group
70
21.3
60
18.2
50
15.2
40
12.1
30
9.1
20
6.0
10
3.0
120
36.5
15
0
4:00
*
20
3:40
2
6:00
H
25
3:40
6
10:00
I
30
3:40
14
18:00
J
40
3:20
5
25
34:00
L
50
3:20
15
31
50:00
N
60
3:00
2
22
45
73:00
O
70
3:00
9
23
55
91:00
O
80
3:00
15
27
63
109:00
Z
90
3:00
19
37
74
134:00
Z
100
3:00
23
45
80
152:00
Z
Exceptional
Exposure
120
2:40
10
19
47
98
178:00
**
180
2:20
5
27
37
76
137
286:00
**
240
2:20
23
35
60
97
179
398:00
**
360
2:00
18
45
64
93
142
187
553:00
**
480
1:40
3
41
64
93
122
142
187
656:00
**
720
1:40
32
74
100
114
122
142
187
775:00
**
130
39.6
10
0
4:20
*
15
4:00
1
5:20
F
20
4:00
4
8:20
H
25
4:00
10
14:20
J
30
3:40
3
18
25:20
M
40
3:40
10
25
39:20
N
50
3:20
3
21
37
65:20
O
60
3:20
9
23
52
88:20
Z
70
3:20
16
24
61
105:20
Z
80
3:00
3
19
35
72
133:20
Z
90
3:00
8
19
45
80
156:20
Z
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