CHAPTER 9 — Air Decompression
Change A 9-55
* 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.
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
40
12.1
200
0
1:20
*
210
1:00
2
3:20
N
230
1:00
7
8:20
N
250
1:00
11
12:20
O
270
1:00
15
16:20
O
300
1:00
19
20:20
Z
Exceptional
Exposure
360
1:00
23
24:20
**
480
1:00
41
42:20
**
720
1:00
69
70:20
**
50
15.2
100
0
1:40
*
110
1:20
3
4:40
L
120
1:20
5
6:40
M
140
1:20
10
11:40
M
160
1:20
21
22:40
N
180
1:20
29
30:40
O
200
1:20
35
36:40
O
220
1:20
40
41:40
Z
240
1:20
47
48:40
Z
60
18.2
60
0
2:00
*
70
1:40
2
4:00
K
80
1:40
7
9:00
L
100
1:40
14
16:00
M
120
1:40
26
28:00
N
140
1:40
39
41:00
O
160
1:40
48
50:00
Z
180
1:40
56
58:00
Z
200
1:20
1
69
72:00
Z
Exceptional
Exposure
240
1:20
2
79
83:00
**
360
1:20
20
119
141:00
**
480
1:20
44
148
194:00
**
720
1:20
78
187
267:00
**
70
21.3
50
0
2:20
*
60
2:00
8
10:20
K
70
2:00
14
16:20
L
80
2:00
18
20:20
M
90
2:00
23
25:20
N
100
2:00
33
35:20
N
110
1:40
2
41
45:20
O
120
1:40
4
47
53:20
O
130
1:40
6
52
60:20
O
140
1:40
8
56
66:20
Z
150
1:40
9
61
72:20
Z
160
1:40
13
72
87:20
Z
170
1:40
19
79
100:20
Z
