No-Decompression Limits and Repetitive Group Designation Table for No-Decompression Air Dives
. No-Decompression Limits (minutes) Group Designation
Depth(ft) Doppler Navy A B C D E F G H I J K
10
 . . 60 120 210 300 . . . . . . .
15
 . . 35 70 110 160 225 350 . . . . .
20
 . . 25 50 75 100 135 180 240 325 . . .
25
245
 . 20 35 55 75 100 125 160 195 245 . .
30
205
 . 15 30 45 60 75 95 120 145 170 205 .
35
160
310
 5 15 25 40 50 60 80 100 120 140 160
40
130
200
 5 15 25 30 40 50 70 80 100 110 130
50
70
100
 . 10 15 25 30 40 50 60 70 . .
60
50
60
 . 10 15 20 25 30 40 50 . . .
70
40
50
 . 5 10 15 20 30 35 40 . . .
80
30
40
 . 5 10 15 20 25 30 . . . .
90
25
30
 . 5 10 12 15 20 25 . . . .
100
20
25
 . 5 7 10 15 20 . . . . .
110
15
20
 . . 5 10 13 15 . . . . .
120
10
15
 . . 5 10 . . . . . . .
130
5
10
 . . 5 . . . . . . . .
REPETITIVE DIVE GROUP AT THE BEGINNING OF THE SURFACE INTERVAL
 A 0:10
12:00 
. B 0:10
2:10		 2:11
12:00 
. C 0:10
1:39		 11:40
2:49		 2:20
12:00 
. D 0:10
1:09		 1:10
2:38		 2:39
5:48		 5:49
12:00 
. E 0:10
0:54		 0:55
1:57		 1:58
3:22		 3:23
6:32		 6:33
12:00 
. F 0:10
0:45		 0:46
1:29		 1:30
2:28		 2:29
3:57		 3:58
7:05		 7:06
12:00 
. G 0:10
0:40		 0:41
1:15		 1:16
1:59		 2:00
2:58		 2:59
4:25		 4:26
7:35		 7:36
12:00 
. H 0:10
0:36		 0:37
1:06		 1:07
1:41		 1:42
2:23		 2:24
3:20		 3:21
4:49		 4:50
7:59		 8:00
12:00 
. I 0:10
0:33		 0:34
0:59		 1:00
1:29		 1:30
2:02		 2:03
2:44		 2:45
3:43		 3:44
5:12		 5:13
8:21		 8:22
12:00 
. J 0:10
0:31		 0:32
0:54		 0:55
1:19		 1:20
1:47		 1:48
2:20		 2:21
3:04		 3:05
4:02		 4:03
5:40		 5:41
8:40		 8:41
12:00 
K 
 0:10
0:28		 0:29
0:49		 0:50
1:11		 1:12
1:35		 1:36
2:03		 2:04
2:38		 2:39
3:21		 3:22
4:19		 4:20
5:48		 5:49
8:58		 8:59
12:00 
Repetitive Dive Depth K J I H G F E D C B A
40
 138 116 101 87 73 61 49 37 25 17 7 
50
 99 87 76 66 56 47 38 29 21 13 6 
60
 . . . 52 44 36 30 24 17 11 5 
70
 . . . 43 37 31 26 20 15 9 4 
80
 . . . 38 32 28 23 18 13 8 4 
90
 . . . . 29 24 20 16 11 7 3 
100
 . . . . . 22 18 14 10 7 3 
110
 . . . . . . 16 13 10 6 3 
120
 . . . . . . . 12 9 6 3 
130
 . . . . . . . . 8 6 3 

 
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