Table 9-6. Unlimited/No-Decompression Limits and Repetitive Group Designation Table for Unlimited/NoDecompression Air Dives. Depth (feet/meters) 10 3.0 15 4.6 20 6.1 25 7.6 30 9.1 35 10.7 40 12.2 50 15.2 60 18.2 70 21.3 80 24.4 90 27.4 100 30.5 110 33.5 120 36.6 130 39.6 140 42.7 150 45.7 160 48.8 170 51.8 180 54.8 190 59.9

No-Decompression Limits (min) unlimited unlimited unlimited 595 405 310 200 100 60 50 40 30 25 20 15 10 10 5 5 5 5 5

Group Designation A B C D E F G H I J 60 120 210 300 797 * 35 70 110 160 225 350 452 * 25 50 75 100 135 180 240 325 390 917 20 35 55 75 100 125 160 195 245 315 15 30 45 60 75 95 120 145 170 205 5 15 25 40 50 60 80 100 120 140 5 15 25 30 40 50 70 80 100 110 10 15 25 30 40 50 60 70 80 10 15 20 25 30 40 50 55 60 5 10 15 20 30 35 40 45 50 5 10 15 20 25 30 35 40 5 10 12 15 20 25 30 5 7 10 15 20 22 25 5 10 13 15 20 5 10 12 15 5 8 10 5 7 10 5 5 5 5 5

K

L

* 361 250 160 130 90

540 310 190 150 100

M

N

O

595 344 405 220 270 310 170 200

* Highest repetitive group that can be achieved at this depth regardless of bottom time.

CHAPTER 9 — Air Decompression

Change A 9-53

Table 9-7. Residual Nitrogen Timetable for Repetitive Air Dives.

0:10 0:28 0:27 0:45 0:43 0:59 0:55 1:11 1:08 1:24 1:19 1:36

0:10 0:31 0:29 0:49 0:46 1:04 1:00 1:18 1:12 1:30 1:25 1:43 1:37 1:55

0:10 0:33 0:32 0:54 0:50 1:11 1:05 1:25 1:19 1:35 1:31 1:53 1:44 2:04 1:56 2:17

0:10 0:36 0:34 0:59 0:55 1:19 1:12 1:35 1:26 1:49 1:36 2:05 1:54 2:18 2:05 2:29 2:18 2:42

0:10 0:40 0:37 1:06 1:00 1:29 1:20 1:47 1:36 2:03 1:50 2:19 2:06 2:34 2:19 2:47 2:30 2:59 2:43 3:10

0:10 0:45 0:41 1:15 1:07 1:41 1:30 2:02 1:48 2:20 2:04 2:38 2:20 2:53 2:35 3:08 2:48 3:22 3:00 3:33 3:11 3:45

0:10 0:54 0:46 1:29 1:16 1:59 1:42 2:23 2:03 2:44 2:21 3:04 2:39 3:21 2:54 3:36 3:09 3:52 3:23 4:04 3:34 4:17 3:46 4:29

0:10 1:09 0:55 1:57 1:30 2:28 2:00 2:58 2:24 3:20 2:45 3:43 3:05 4:02 3:22 4:19 3:37 4:35 3:53 4:49 4:05 5:03 4:18 5:16 4:30 5:27

0:10 1:39 1:10 2:38 1:58 3:24 2:29 3:57 2:59 4:25 3:21 4:49 3:44 5:12 4:03 5:40 4:20 5:48 4:36 6:02 4:50 6:18 5:04 6:32 5:17 6:44 5:28 6:56

0:10 3:20 1:40 4:49 2:39 5:48 3:25 6:34 3:58 7:05 4:26 7:35 4:50 7:59 5:13 8:21 5:41 8:50 5:49 8:58 6:03 9:12 6:19 9:28 6:33 9:43 6:45 9:54 6:57 10:05

0:10 12:00* 3:21 12:00* 4:50 12:00* 5:49 12:00* 6:35 12:00* 7:06 12:00* 7:36 12:00* 8:00 12:00* 8:22 12:00* 8:51 12:00* 8:59 12:00* 9:13 12:00* 9:29 12:00* 9:44 12:00* 9:55 12:00* 10:06 12:00*

K

J

I

H

G

F

E

D

C

B

A

** ** 229 138 99 79 64 54 47 43 38 35 31 29 27 26 24 22 21

** 917 190 116 87 70 57 48 43 38 34 32 28 26 24 23 22 20 19

** 399 159 101 76 61 50 43 38 34 31 28 25 23 22 20 19 18 17

** 279 132 87 66 52 43 38 33 30 27 25 22 20 19 18 17 16 15

** 208 109 73 56 44 37 32 29 26 24 21 19 18 17 16 15 14 13

** 159 88 61 47 36 31 28 24 22 20 18 16 15 14 13 12 11 10

797 120 70 49 38 30 26 23 20 18 16 15 13 12 12 11 10 10 10

279 88 54 37 29 24 20 18 16 14 13 12 11 10 9 9 8 8 8

159 62 39 25 21 17 15 13 11 10 10 9 8 7 7 6 6 6 6

88 39 25 17 13 11 9 8 7 7 6 6 6 5 5 4 4 4 4

39 18 12 7 6 5 4 4 3 3 3 3 3 2 2 2 2 2 2

A

Locate the diver’s repetitive group designation from his previous dive along the diagonal line above the table. Read horizontally to the interval in which the diver’s surface interval lies. Next, read vertically downward to the new repetitive group designation. Continue downward in this same column to the row that represents the depth of the al rv repetitive dive. The time given at the intersection is residual nitrogen time, in e t in minutes, to be applied to the repetitive dive. ce * Dives following surface intervals of more than 12 hours are not repetitive dives. Use actual bottom times in the Standard Air Decompression Tables to compute decompression for such dives. ** If no Residual Nitrogen Time is given, then the repetitive group does not change.

ve iti t pe Re K

0:10 0:22

0:10 0:23 0:23 0:34

0:10 0:24 0:24 0:36 0:35 0:48

0:10 0:25 0:25 0:39 0:37 0:51 0:49 1:02

0:10 0:26 0:26 0:42 0:40 0:54 0:52 1:07 1:03 1:18

Z

O

N

M

L

** ** † 257 169 122 100 84 73 64 57 52 46 42 40 37 35 32 31

** ** † 241 160 117 96 80 70 62 55 50 44 40 38 36 34 31 30

** ** † 213 142 107 87 73 64 57 51 46 40 38 35 33 31 29 28

** ** 349 187 124 97 80 68 58 52 47 43 38 35 32 31 29 27 26

** ** 279 161 111 88 72 61 53 48 42 39 35 32 30 28 26 25 24

L M N O Z Repetitive Dive Depth

p ou gr

at

J

e th

ng ni n gi be

e th of

H I

rfa su

G

E F

New Repetitive Group Designation

B C D

feet/meters 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190

3.0 6.1 9.1 12.2 15.2 16.2 21.3 24.4 27.4 30.5 33.5 36.6 39.6 42.7 45.7 48.8 51.8 54.8 59.9

Residual Nitrogen Times (MInutes) †

Read vertically downward to the 40/12.2 (feet/meter) repetitive dive depth. Use the corresponding residual nitrogen times (minutes) to compute the equivalent single dive time. Decompress using the 40/12.2 (feet/meter) standard air decompression table.

9-54 Change A

U.S. Navy Diving Manual—Volume 2

Table 9-8. U.S. Navy Standard Air Decompression Table. Decompression stops(feet/meters) Depth feet/meters

40 12.1 50 15.2 60 18.2

70 21.3

Bottom time (min)

Time first stop (min:sec)

200 210 230 250 270 300 Exceptional Exposure 360 480 720

50

40

30

20

10

15.2

12.1

9.1

6.0

3.0

Total decompression time Repetitive (min:sec) group

1:00 1:00 1:00 1:00 1:00

0 2 7 11 15 19

1:20 3:20 8:20 12:20 16:20 20:20

* N N O O Z

1:00 1:00 1:00

23 41 69

24:20 42:20 70:20

** ** **

1:20 1:20 1:20 1:20 1:20 1:20 1:20 1:20

0 3 5 10 21 29 35 40 47

1:40 4:40 6:40 11:40 22:40 30:40 36:40 41:40 48:40

* L M M N O O Z Z

1:40 1:40 1:40 1:40 1:40 1:40 1:40 1:20

1

0 2 7 14 26 39 48 56 69

2:00 4:00 9:00 16:00 28:00 41:00 50:00 58:00 72:00

* K L M N O Z Z Z

240 360 480 720

1:20 1:20 1:20 1:20

2 20 44 78

79 119 148 187

83:00 141:00 194:00 267:00

** ** ** **

50 60 70 80 90 100 110 120 130 140 150 160 170

2:00 2:00 2:00 2:00 2:00 1:40 1:40 1:40 1:40 1:40 1:40 1:40

2 4 6 8 9 13 19

0 8 14 18 23 33 41 47 52 56 61 72 79

2:20 10:20 16:20 20:20 25:20 35:20 45:20 53:20 60:20 66:20 72:20 87:20 100:20

* K L M N N O O O Z Z Z Z

100 110 120 140 160 180 200 220 240 60 70 80 100 120 140 160 180 200 Exceptional Exposure

* See No Decompression Table for repetitive groups ** Repetitive dives may not follow exceptional exposure dives

CHAPTER 9 — Air Decompression

Change A 9-55

Table 9-8. U.S. Navy Standard Air Decompression Table (Continued). Decompression stops(feet/meters) Depth feet/meters

80 24.3

90 28.7 100 30.4

Bottom time (min) 40 50 60 70 80 90 100 110 120 130 140 150 Exceptional Exposure 180 240 360 480 720 30 40 50 60 70 80 90 100 110 120 130 25 30 40 50 60 70 80 90 100 110 120 Exceptional Exposure 180 240 360 480 720

Time first stop (min:sec)

50

40

30

20

10

15.2

12.1

9.1

6.0

3.0

2 7 11 13 17 19 26 32

0 10 17 23 31 39 46 53 56 63 69 77

2:40 12:40 19:40 25:40 35:40 48:40 59:40 68:40 75:40 83:40 97:40 111:40

* K L M N N O O Z Z Z Z

35 52 90 107 142

85 120 160 187 187

122:40 180:40 281:40 355:40 456:40

** ** ** ** **

7 13 18 21 24 32 36

0 7 18 25 30 40 48 54 61 68 74

3:00 10:00 21:00 28:00 40:00 56:00 69:00 78:00 88:00 103:00 118:00

* J L M N N O Z Z Z Z

3 7 10 12

2 9 17 23 23 23 34 41

0 3 15 24 28 39 48 57 66 72 78

3:20 6:20 18:20 29:20 40:20 59:20 74:20 86:20 99:20 119:20 134:20

* I K L N O O Z Z Z Z

29 42 73 91 122

53 84 111 142 142

118 142 187 187 187

204:20 285:20 418:20 505:20 615:20

** ** ** ** **

2:20 2:20 2:20 2:00 2:00 2:00 2:00 2:00 2:00 2:00 2:00

2:00 1:40 1:40 1:40 1:20

17

2:40 2:40 2:40 2:20 2:20 2:20 2:20 2:20 2:20 2:00

2:00 2:00 1:40 1:40 1:40

6 29 59 108

5

3:00 3:00 2:40 2:40 2:40 2:40 2:20 2:20 2:20 2:20

2 21 55

1 14 42 61 106

Total decompression time Repetitive (min:sec) group

* See No Decompression Table for repetitive groups ** Repetitive dives may not follow exceptional exposure dives

9-56 Change A

U.S. Navy Diving Manual—Volume 2

Table 9-8. U.S. Navy Standard Air Decompression Table (Continued). Decompression stops(feet/meters) Depth feet/meters

110 33.1

Depth feet/meters

120 36.5

130 39.6

Bottom time (min)

Time first stop (min:sec)

20 25 30 40 50 60 70 80 90 100

3:20 3:20 3:00 3:00 3:00 2:40 2:40 2:40 2:40

Bottom time (min)

Time 70 first stop (min:sec) 21.3

15 20 25 30 40 50 60 70 80 90 100 Exceptional Exposure 120 180 240 360 480 720 10 15 20 25 30 40 50 60 70 80 90

50

40

30

20

10

15.2

12.1

9.1

6.0

3.0

2 8 18 23 23 30 37

1 7 12 15

15.2

12.1

3:40 3:40 3:40 3:20 3:20 3:00 3:00 3:00 3:00 3:00

2:40 2:20 2:20 2:00 1:40 1:40

4:00 4:00 4:00 3:40 3:40 3:20 3:20 3:20 3:00 3:00

3 32

0 3 7 21 26 36 48 57 64 72

Decompression stops(feet/meters) 50 40 30 20 60 18.2

18 41 74

5 23 45 64 100

10 27 35 64 93 114

3 8

9.1

Total decompression time Repetitive (min:sec) group 3:40 6:40 10:40 26:40 37:40 57:40 75:40 90:40 109:40 127:40

10

* H J L M N O Z Z Z

Total Repetitive decompression group time (min:sec) 4:00 * 6:00 H 10:00 I 18:00 J 34:00 L 50:00 N 73:00 O 91:00 O 109:00 Z 134:00 Z 152:00 Z

6.0

3.0

2 9 15 19 23

5 15 22 23 27 37 45

0 2 6 14 25 31 45 55 63 74 80

19 37 60 93 122 122

47 76 97 142 142 142

98 137 179 187 187 187

178:00 286:00 398:00 553:00 656:00 775:00

** ** ** ** ** **

3 10 21 23 24 35 45

0 1 4 10 18 25 37 52 61 72 80

4:20 5:20 8:20 14:20 25:20 39:20 65:20 88:20 105:20 133:20 156:20

* F H J M N O Z Z Z Z

3 9 16 19 19

* See No Decompression Table for repetitive groups ** Repetitive dives may not follow exceptional exposure dives

CHAPTER 9 — Air Decompression

Change A 9-57

Table 9-8. U.S. Navy Standard Air Decompression Table (Continued).

Depth feet/meters

140 42.6

150 45.7

160 48.7

Bottom time (min) 10 15 20 25 30 40 50 60 70 80 Exceptional Exposure 90 120 180 240 360 480 720 5 10 15 20 25 30 40 50 60 70 80 5 10 15 20 25 30 40 50 60 Exceptional Exposure 70

Decompression stops(feet/meters) Time 90 80 70 60 50 40 30 20 first stop (min:sec) 27.4 24.3 21.3 18.2 15.2 12.1 9.1 6.0

2 6 16 19 23

2 5 16 24 23 32 41

4:40 6:40 10:40 20:40 30:40 48:40 78:40 99:40 127:40 157:40

* G I J K N O Z Z Z

2 14 18 12 14 36 26 32 54 34 50 78 64 84 122 100 114 122 100 114 122

42 56 94 124 142 142 142

88 120 168 187 187 187 187

168:40 242:40 388:40 513:40 686:40 803:40 926:40

** ** ** ** ** ** **

2 4 8 19 23 26 39 50

0 1 3 7 17 24 33 51 62 75 84

5:00 6:00 8:00 14:00 26:00 37:00 62:00 91:00 115:00 149:00 176:00

C E G H K L N O Z Z Z

2 9

2 7 16 19

1 3 7 11 23 23 33

0 1 4 11 20 25 39 55 69

5:20 6:20 10:20 19:20 32:20 43:20 74:20 101:20 135:20

D F H J K M N Z Z

17

22

44

80

169:20

**

4 10

3:00 3:00 2:40 2:20 2:00 2:00 1:40

4:40 4:40 4:20 4:20 4:20 4:00 4:00 3:40 3:40 3:20

16

9 31 56

10 28 42 59 97

1

5:00 4:40 4:40 4:40 4:20 4:20 4:00 4:00 3:40

3.0 0 2 6 14 21 26 44 56 68 79

4:20 4:20 4:00 4:00 3:40 3:40 3:40 3:20 3:20

8 32 44 88

10

Total decompression time Repetitive (min:sec) group

1

3 11 17

5 12 19 19 19

* See No Decompression Table for repetitive groups ** Repetitive dives may not follow exceptional exposure dives

9-58 Change A

U.S. Navy Diving Manual—Volume 2

Table 9-8. U.S. Navy Standard Air Decompression Table (Continued). Depth feet/meters

170 51.8

180 54.8 190 57.9

Bottom time (min)

Decompression stops(feet/meters) Total Time decompression Repetitive first stop 110 100 90 80 70 60 50 40 30 20 10 time group (min:sec) 33.5 30.4 27.4 24.3 21.3 18.2 15.2 12.1 9.1 6.0 3.0 (min:sec)

5 10 15 20 25 30 40 50 60 Exceptional Exposure 70 90 120 180 240 360 480

5:20 5:00 5:00 4:40 4:40 4:20 4:20 4:00 4:00 3:40 3:00 2:40 2:40 2:20 2:00

5 10 15 20 25 30 40 50 60 5 10 15 20 25 30 40 Exceptional Exposure 50 60

5:40 5:20 5:00 5:00 5:00 4:40 4:20 4:20 5:40 5:40 5:40 5:20 :5:20 5:00 5:00 4:40 4:40

2 4 7 13 23 23 37

0 2 5 15 23 26 45 61 74

5:40 7:40 12:40 24:40 37:40 48:40 84:40 112:40 155:40

D F H J L M O Z Z

51 52 82 120 142 142 142

86 120 156 187 187 187 187

186:40 249:40 359:40 538:40 684:40 876:40 1010:40

** ** ** ** ** ** **

1 3 6 3 14 2 9 19 5 16 19

3 5 10 17 23 30 44

0 3 6 17 24 27 50 65 81

6:00 9:00 15:00 29:00 43:00 56:00 96:00 131:00 171:00

D F I J L N O Z Z

2 5 1 8 8 14

1 6 6 11 19 23

0 3 7 20 25 32 55

6:20 10:20 17:20 34:20 47:20 66:20 106:20

D G I K M N O

4 13 22 33 72 10 17 19 50 84

150:20 186:20

** **

2 4 1 10 5 18 2 15 22

14

4 18 22 34 40 42

2 10 24 40 56

10 22 30 52 91

12 12 28 42 60 97

8 12 18 34 50 98 100

17 14 32 50 70 114 114

19 34 42 78 116 122 122

* See No Decompression Table for repetitive groups ** Repetitive dives may not follow exceptional exposure dives

CHAPTER 9 — Air Decompression

Change A 9-59

Table 9-8. U.S. Navy Standard Air Decompression Table (Continued). Depth feet/meters

200 60.9

210 64.0 220 67.0

230 70.1

9-60 Change A

Bottom time (min)

Decompression stops(feet/meters) Total Time 130 120 110 100 90 80 70 60 50 40 30 20 10 decompression first stop time (min:sec) 36.5 30.4 24.3 18.2 12.1 6.0 (min:sec) 39.6 33.5 27.4 21.3 15.2 9.1 3.0

Exceptional Exposure 5 10 15 20 25 30 40 50 60 90 120 180 240 360

6:20 6:00 5:40 5:40 5:40 5:20 5:00 5:00 4:40 3:40 3:20 2:40 2:40 2:20

Exceptional Exposure 5 10 15 20 25 30 40 50

6:40 6:20 6:00 6:00 5:40 5:40 5:20 5:20

Exceptional Exposure 5 10 15 20 25 30 40 50

7:00 6:40 6:20 6:00 6:00 5:40 5:40 5:20

Exceptional Exposure 5 10 15 20 25 30 40 50

7:20 6:20 6:20 6:20 6:20 6:00 5:40 5:40

12

1 6 22

10 20 36

6 10 24 40

1 10 18 24 44

10 10 24 36 56

10 10 24 42 82

2 12 24 42 54 98

2 2 8 6 16 13 17 12 30 28 40 48 70 68 114 100 114

2 4 4 9 9 17

1

3

1 5

1 3 7 9 17 22 24 38 64 106 122 122

1 4 7 9 19 19

1 4 7 14 22 23 39 51 74 98 142 142 142

2 5 10 17 24 26 45

1 4 10 27 25 37 59 75 89 134 180 187 187 187

1 4 13 23 27 41 63 80

7:40 11:40 21:40 43:40 52:40 76:40 115:40 164:40 202:40 327:40 476:40 688:40 845::40 1061:40

8:00 13:00 26:00 44:00 60:00 85:00 128:00 178:00

1 3 1 7 6 12 12 17

2 2 5 3 11 8 19 10 23 22 29 18 51

1 5 16 24 33 47 68 86

8:20 14:20 30:20 46:20 70:20 95:20 144:20 194:20

2 4 2 8 7 15 14 16

1 3 5 8 12 22 24

2 6 18 26 37 51 74 89

9:40 16:40 34:40 52:40 78:40 103:40 160:40 206:40

2 6 12 22 23 34 51

U.S. Navy Diving Manual—Volume 2

Table 9-8. U.S. Navy Standard Air Decompression Table (Continued). Bottom time (min)

Depth feet/meters

Exceptional Exposure 5 10 15 20 25 30 40 50

240 73.1 Depth feet/meters

250 76.2

260 79.2 270 82.3

Decompression stops(feet/meters) Total Time 130 120 110 100 90 80 70 60 50 40 30 20 10 decompression first stop time (min:sec) 36.5 30.4 24.3 18.2 12.1 6.0 (min:sec) 39.6 33.5 27.4 21.3 15.2 9.1 3.0

Bottom time (min)

7:40 7:00 7:00 6:40 6:20 6:20 6:00 5:40

3 8

1

3 1 4 4 8 7 17 15 16

1 4 6 9 15 22 29

3 6 15 24 22 39 51

2 6 21 25 40 56 75 94

10:00 18:00 39:00 57:00 86:00 113:00 171:00 222:00

Decompression stops(feet/meters) Total Time first 200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 decomstop pression (min: time 57.9 51.8 45.7 39.6 33.5 27.4 21.3 15.2 9.1 3.0 sec) 60.9 (min:sec) 54.8 48.7 42.6 36.5 30.4 24.3 18.2 12.1 6.0

Exceptional Exposure 5 10 15 20 25 30 40 60 90 120 180 240

7:40 7:20 7:00 7:00 6:40 6:40 6:20 5:20 4:20 3:40 3:00 3:00

Exceptional Exposure 5 10 15 20 25 30 40

8:00 7:40 7:20 7:00 7:00 6:40 6:20

Exceptional Exposure 5 10 15 20 25 30 40

8:20 8:00 7:40 7:20 7:00 7:00 6:40

CHAPTER 9 — Air Decompression

8 10 5 10 10 10 4 8 8 10 22 24 9 14 21 22 22 40

10 10 24 40

4 10 16 32 42

10 10 24 42 56

10 10 24 44 76

1

5

1 4 7 7 17 22 44 64 114 114

1 4 7 10 17 19 36 68 94 122 122

1 4 7 17 24 23 45 64 98 142 142 142

2 1 4 3 8 2 6 8 6 11 16

2 4 7 11 19 19

1 4 10 20 23 26 49

2 9 22 31 50 61 84

11:40 23:40 46:40 71:40 103:40 130:40 194:40

3 2 3 2 3 8 3 6 12 6 11 17

2 4 9 13 22 22

1 5 11 21 23 27 51

3 11 24 35 53 64 88

13:00 27:00 51:00 79:00 111:00 143:00 209:00

5 10 28 36 60 98

2 6 9 12 28 48 84 100

2 11:20 7 20:20 22 42:20 27 63:20 45 96:20 59 120:20 79 182:20 164 302:20 186 518:20 187 688:20 187 935:20 187 1113:20

Change A 9-61

Table 9-8. U.S. Navy Standard Air Decompression Table (Continued). Decompression stops(feet/meters) Time Total first 200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 decomstop pression (min: time 57.9 51.8 45.7 39.6 33.5 27.4 21.3 15.2 9.1 3.0 sec) 60.9 (min:sec) 54.8 48.7 42.6 36.5 30.4 24.3 18.2 12.1 6.0

Depth feet/meters

Bottom time (min)

280 85.3

Exceptional Exposure 5 10 15 20 25 30 40

8:40 8:00 7:40 7:40 7:20 7:00 6:40

Exceptional Exposure 5 10 15 20 25 30 40

9:00 8:20 8:00 8:00 7:40 7:20 7:00

290 88.4

Depth feet/meters

300 91.4

Bottom time (min) Exceptional Exposure 5 10 15 20 25 30 40 60 90 120 180

9-62 Change A

1

3

1 6

1 5

1 3 2 5 3 7 6 13

2 2 1 2 5 13 3 4 11 26 4 8 23 39 7 16 23 56 13 22 30 70 17 27 51 93

13:20 30:20 54:20 86:20 118:20 155:20 223:20

1 3 3 5 5 6 7 15

2 3 1 3 5 16 3 6 12 26 7 9 23 43 8 17 23 60 16 22 36 72 16 32 51 95

14:40 34:40 57:40 94:40 125:40 167:40 233:40

Decompression stops(feet/meters) Total Time first 200 190 180 170 160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 decomstop pression (min: time 57.9 51.8 45.7 39.6 33.5 27.4 21.3 15.2 9.1 3.0 54.8 48.7 42.6 36.5 30.4 24.3 18.2 12.1 6.0 sec) 60.9 (min:sec)

9:20 8:40 8:20 8:00 7:40 7:40 7:20 6:00 4:40 4:00 3:30

6

8

4 8

4 ‘3 8 8 10 10 8 8 8 8 10 14 8 14 20 21 21 28

10 10 24 40

10 10 24 40

10 16 24 48

4 10 24 34 56

1 2 6 10 24 42 82

2 3 5 9 14 34 58 98

2 3 6 7 15 28 48 66 100

1 3 7 8 17 17 32 64 102 114

3 6 10 19 22 34 50 90 122 122

3 6 15 23 26 39 51 90 142 142 142

3 16:00 17 37:00 26 62:00 47 102:00 61 134:00 75 177:00 90 ‘236:00 187 465:00 187 698:00 187 895:00 187 1173:00

U.S. Navy Diving Manual—Volume 2

Table 9-9. Surface Decompression Table Using Oxygen.

70 21.3 80 24.3 90 27.4 100 30.4 110 33.5

40 70 85 100 115 130 150

2:40 2:40 2:40 2:40 2:40 2:40 2:40

30 60 70 80 90 100 110 120 130

3:00 3:00 3:00 3:00 3:00 3:00 3:00 3:00 3:00

25 50 60 70 80 90 100 110 120

3:20 3:20 3:20 3:20 3:20 3:20 3:20 3:20 2:20

20 40 50 60 70 80 90 100 110

3:40 3:40 3:40 3:40 3:40 2:40 2:40 2:40 2:40

CHAPTER 9 — Air Decompression

50

40

30

15.2

12.1

9.1

3

1 2 5 12

Surface Interval

TOTAL TIME FROM LAST WATER STOP TO FIRST CHAMBER STOP NOT TO EXCEED 5 MINUTES

Depth feet/meters

Bottom time (min) 50 90 120 150 180

Time to first stop or 60 surface (min:sec) 18.2 2:20 2:20 2:20 2:20 2:20

Time at 40-foot chamber stop (min) on oxygen 15 23 31 39

Total decompression time (min:sec) 2:20 22:40 30:40 43:40 51:40

14 20 26 31 37 44

2:40 22:00 28:00 34:00 44:00 50:00 57:00

14 20 25 30 34 39 43 48

Surface

1-MINUTE 20 SECONDS ASCENT FROM 40 FEET IN CHAMBER TO SURFACE

Time (min) breathing air at water stops (feet/meters)

3:00 22:20 28:20 33:20 38:20 47:20 52:20 56:20 61:20

14 20 26 32 38 44 49 53

3:20 22:40 28:40 34:40 45:40 51:40 57:40 62:40 69:20

12 19 26 33 40 46 51 54

3:40 21:00 28:00 35:00 47:00 55:00 62:00 70:00 80:00

Change A 9-63

Table 9-9. Surface Decompression Table Using Oxygen (Continued).

120 36.5 130 39.6 140 42.6

150 45.7

9-64 Change A

10 30 40 50 60 70 80 90

4:20 4:20 4:20 3:20 3:20 3:20 3:00 3:00

10 25 30 35 40 45 50 55 60 65 70

4:40 4:40 4:40 4:40 3:40 3:40 3:40 3:40 3:40 3:20 3:00

5 25 30 35 40 45 50 55

5:00 5:00 5:00 4:00 3:40 3:40 3:20 3:00

50

40

30

15.2

12.1

9.1

3 6

6 10

2

2

2 5

3 7

3 5 5 9

2 4 5 7 15

3 5 7 7 12

2 4 6 7 8 7 7

4 6 7 8 4

Surface Interval

TOTAL TIME FROM LAST WATER STOP TO FIRST CHAMBER STOP NOT TO EXCEED 5 MINUTES

Depth feet/meters

Bottom time (min) 15 30 40 50 60 70 80 90 100

Time to first stop or 60 surface (min:sec) 18.2 4:00 4:00 4:00 4:00 3:00 3:00 3:00 3:00 3:00

Time at 40-foot chamber stop (min) on oxygen 9 16 24 32 39 46 51 54

Total decompression time (min:sec) 4:00 18:20 25:20 33:20 48:20 57:20 65:20 75:20 89:20

12 21 29 37 45 51 56

4:20 21:40 30:40 41:40 56:40 66:40 78:40 92:40

11 15 20 24 29 33 38 43 48 51

13 18 23 27 33 38 44

Surface

1-MINUTE 20 SECONDS ASCENT FROM 40 FEET IN CHAMBER TO SURFACE

Time (min) breathing air at water stops (feet/meters)

4:40 21:00 25:00 30:00 36:00 43:00 54:00 60:00 66:00 73:00 82:00

5:00 23:20 28:20 37:20 46:20 60:20 68:20 79:20

U.S. Navy Diving Manual—Volume 2

Table 9-9. Surface Decompression Table Using Oxygen (Continued).

160 48.7 170 51.8

5 20 25 30 35 40

5:40 5:40 5:40 4:20 4:00 3:40

CHAPTER 9 — Air Decompression

4

50

40

30

15.2

12.1

9.1

3 4

4 4

4 5 8

3 4 8

2 6 8 6

5 7 6

Surface Interval

Time at 40-foot chamber stop (min) on oxygen 11 16 21 26 32 38

13 19 23 29 36

Surface

1-MINUTE 20 SECONDS ASCENT FROM 40 FEET IN CHAMBER TO SURFACE

Depth feet/meters

Bottom time (min) 5 20 25 30 35 40 45

Time to first stop or 60 surface (min:sec) 18.2 5:20 5:20 5:20 4:20 4:00 3:40 3:20 3

TOTAL TIME FROM LAST WATER STOP TO FIRST CHAMBER STOP NOT TO EXCEED 5 MINUTES

Time (min) breathing air at water stops (feet/meters)

Total decompression time (min:sec) 5:20 21:40 26:40 33:40 46:40 63:40 74:40

5:40 24:00 30:00 42:00 55:00 74:00

Change A 9-65

Table 9-10. Surface Decompression Table Using Air.

Time to first stop or surface (min:sec)

Chamber stops (air) (min) (feet/meters)

Time (min) at water stops (feet/meters)

3.0

Total decompression time (min:sec)

40 12.1

230 250 270 300

1:00 1:00 1:00 1:00

3 3 3 3

7 11 15 19

15:20 19:20 23:20 27:20

50 15.2

120 140 160 180 200 220 240

1:20 1:20 1:20 1:20 1:20 1:20 1:20

3 3 3 3 3 3 3

5 10 21 29 35 40 47

13:40 18:40 29:40 37:40 43:40 48:40 55:40

60 18.2

80 100 120 140 160 180 200

1:40 1:40 1:40 1:40 1:40 1:40 1:20

3 3 3 3 3 3 3

7 14 26 39 48 56 69

16:00 23:00 35:00 48:00 57:00 65:00 81:30

60 70 80 90 100 110 120 130 140 150 160 170

2:00 2:00 2:00 2:00 2:00 1:40 1:40 1:40 1:40 1:40 1:40 1:40

3 4 6 8 9 13 19

8 14 18 23 33 41 47 52 56 61 72 79

17:20 23:20 27:20 32:20 42:20 53:50 60:50 67:50 73:50 79:50 94:50 107:50

50 60 70 80 90 100 110 120 130 140 150

2:20 2:20 2:20 2:00 2:00 2:00 2:00 2:00 2:00 2:00 2:00

3 7 11 13 17 19 26 32

10 17 23 31 39 46 53 56 63 69 77

19:40 26:40 32:40 44:10 56:10 67:10 76:10 83:10 92:10 128:10 148:10

Depth feet/meters

70 21.3

80 24.3

9-66 Change A

Bottom time (min)

30

20

10

9.1

6.0

3.0

3

Surface Interval

20

10

6.0

3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 26 32

U.S. Navy Diving Manual—Volume 2

Table 9-10. Surface Decompression Table Using Air (Continued).

Depth feet/meters

90 27.4

Bottom time (min)

Time to first stop or surface (min:sec)

40 50 60 70 80 90 100 110 120 130

2:40 2:40 2:40 2:20 2:20 2:20 2:20 2:20 2:20 2:00

40 50 60 70 80 90 100 110 120

3:00 2:40 2:40 2:40 2:40 2:20 2:20 2:20 2:20

110 33.5

30 40 50 60 70 80 90 100

3:20 3:00 3:00 3:00 2:40 2:40 2:40 2:40

120 35.5

25 30 40 50 60 70 80 90 100

3:40 3:40 3:20 3:20 3:00 3:00 3:00 3:00 3:00

100 30.4

CHAPTER 9 — Air Decompression

Chamber stops (air) (min) (feet/meters)

Time (min) at water stops (feet/meters) 30

20

10

9.1

6.0

3.0

Surface Interval

20

10

6.0

3.0

Total decompression time (min:sec)

7 13 18 21 24 32 36

7 18 25 30 40 48 54 61 68 74

17:00 28:00 35:00 47:30 73:30 91:30 103:30 116:30 139:30 158:30

3 9 17 23 23 23 34 41

15 24 28 39 48 57 66 72 78

25:20 37:50 47:50 66:50 101:50 113:50 126:50 157:50 179:50

3 8 18 23 23 30 37

7 21 26 36 48 57 64 72

17:40 35:10 45:10 80:10 103:10 118:10 144:10 169:10

5 15 22 23 27 37 45

6 14 25 31 45 55 63 74 80

17:00 25:00 41:30 69:30 99:30 118:30 140:30 175:30 201:30

3 3 3

5

3 13 18 21 24 32 36

3 7 10 12

3 3 3 23 23 23 34 41

1 7 12 15

3 3 18 23 23 30 37

3

3

3 3 2 9 15 19 23

3 15 22 23 27 37 45

Change A 9-67

Table 9-10. Surface Decompression Table Using Air (Continued).

Depth feet/meters

130 39.6 140 42.6 150 45.7 160 48.7 170 51.8

9-68 Change A

Bottom time (min)

Time to first stop or surface (min:sec)

25 30 40 50 60 70 80 90

4:00 3:40 3:40 3:20 3:20 3:20 3:00 3:00

20 25 30 40 50 60 70 80

4:20 4:00 4:00 3:40 3:40 3:40 3:20 3:20

20 25 30 40 50 60 70 80

4:20 4:20 4:20 4:00 4:00 3:40 3:40 3:20

20 25 30 40 50 60 70

4:40 4:40 4:20 4:20 4:00 4:00 3:40

15 20 25 30 40 50 60 70

5:00 5:00 4:40 4:40 4:20 4:20 4:00 4:00

Time (min) at water stops (feet/meters) 50

40

30

20

10

15.2

12.1

9.1

6.0

3.0

3 9 16 19 19

3 10 21 23 24 35 45

Surface Interval

Chamber stops (air) (min) Total (feet/meters) decompression 20 10 time 6.0 3.0 (min:sec)

3

3 8

3 10 21 23 24 35 45

10 18 25 37 52 61 72 80

21:20 32:50 53:50 90:50 115:50 133:50 172:50 205:50

2 6 16 19 23

3 5 16 24 23 32 41

3 5 16 24 23 32 41

6 14 21 26 44 56 68 79

17:40 29:10 40:10 69:10 107:10 127:10 164:10 203:10

5 12 19 19 19

3 4 8 19 23 26 39 50

3 4 8 19 23 26 39 50

7 17 24 33 51 62 75 84

22:30 34:30 49:30 85:30 118:30 145:30 192:30 230:30

2 7 16 19 22

3 7 11 23 23 33 44

3 7 11 23 23 33 44

11 20 25 39 55 69 80

26:50 43:50 58:50 101:50 128:50 172:50 217:50

2 4 10 18 22 19

3 4 7 13 23 23 37 51

3 4 7 13 23 23 37 51

5 15 23 26 45 61 74 86

21:10 33:10 49:10 66:10 112:10 140:10 197:10 242:10

3

4 10

1

1

2 8

3 11 17

2 9 17

1 5 15 17

U.S. Navy Diving Manual—Volume 2

Table 9-10. Surface Decompression Table Using Air (Continued).

Depth feet/meters

180 54.8 190 57.9

Bottom time (min)

Time to first stop or surface (min:sec)

15 20 25 30 40 50 60

5:20 5:00 5:00 5:00 4:40 4:20 4:20

15 20 25 30 40 50 60

5:40 5:20 5:20 5:00 5:00 4:40 4:40

CHAPTER 9 — Air Decompression

Time (min) at water stops (feet/meters)

Chamber stops (air) (min) Total (feet/meters) decompression 20 10 time 6.0 3.0 (min:sec)

50

40

30

20

10

15.2

12.1

9.1

6.0

3.0

3 9 16

1 3 6 14 19 19

3 5 10 17 23 30 44

3 5 10 17 23 30 44

6 17 24 27 50 65 81

22:30 38:30 57:30 77:30 123:30 165:30 219:30

1 8 13 17

2 5 8 14 22 19

4 6 11 19 23 33 50

4 6 11 19 23 33 50

7 20 25 32 55 72 84

25:50 44:50 62:50 89:50 133:50 187:50 240:50

2 5

4 10

Surface Interval

Change A 9-69