Depth (feet)	Time (minutes)	Breathing Media¥	Total Elapsed Time (hr:min)
60†	20	O2§	0:20‡
60	5	Air	0:25
60	20	O2	0:45
60	5	Air	0:50
60	20	O2	1:10
60	5	Air	1:15
60 to 30	30	O2	1:45
30	15	Air	2:00
30	60	O2	3:00
30	15	Air	3:15
30	60	O2	4:15
30 to 0	30	O2	4:45

*	Treatment of Type II or Type I decompression sickness when symptoms are not relieved within 10 minutes at 60 feet.
†	Descent rate--25 ft/min. Ascent rate--1 ft/min. Do not compensate for slower ascent rates. Compensate for faster rates by halting the ascent.
‡	Time at 60 feet begins on arrival at 60 feet.
§	If oxygen must be interrupted because of adverse reaction, allow 15 minutes after the reaction has entirely subsided and resume schedule at point of interruption.
¥	Caregiver breathes air throughout unless he has had a hyperbaric exposure within the past 12 hours, in which case he breathes oxygen at 30 feet.
¶	Extensions to Table 6: Table 6 can be lengthened up to 2 additional 25 minute oxygen breathing periods at 60 feet (20 minutes on oxygen and 5 minutes on air) or up to 2 additional 75 minute oxygen breathing periods at 30 feet (15 minutes on air and 60 minutes on oxygen) or both. If Table 6 is extended only once at either 60 or 30 feet, the tender breathes oxygen during the ascent from 30 feet to the surface. If more than one extension is done, the caregiver begins oxygen breathing for the last hour at 30 feet during ascent to the surface.
Adapted from the US Navy Diving Manual.

Depth (feet)	Time (minutes)	Breathing Media¥	Elapsed Time (hrs:min)
165‡	30#	air	0:30
165 to 60	4	air	0:34
60	20	O2§	0:54
60	5	air	0:59
60	20	O2	1:19
60	5	air	1:29
60	20	O2	1:44
60	5	air	1:49
30	15	air	3:49
30	60	O2	4:49
60 to 30	30	O2	2:19
30	15	air	2:34
30	60	O2	3:34
30 to 0	30	O2	5:19

*	Treatment of arterial gas embolism where complete relief obtained within 30 min at 165 feet. Use also when unable to determine whether symptoms are caused by gas embolism or severe decompression sickness.
†	Descent rate--as fast as possible. Ascent rate--1 ft/min. Do not compensate for slower ascent rates. Compensate for faster ascent rates by halting the ascent.
‡	Time at 165 feet-- includes time from the surface.
§	If oxygen breathing must be interrupted as a result of adverse reaction, allow 15 minutes after the reaction has subsided and resume schedule at the point of interruption.
¥	Caregiver breathes oxygen during ascent from 30 feet to the surface unless he has had hyperbaric exposure within the past 12 hours, in which case he breathes oxygen at 30 feet.
¶	Extensions: Table 6A can be lengthened up to 2 additional 25 minute periods at 60 feet (20 minutes on oxygen and 5 minutes on air) or up to 2 additional 75 minute oxygen breathing periods at 30 feet (15 minutes on air and 60 minutes on oxygen), or both. If Table 6A is extended either at 60 or 30 feet, the tender breathes oxygen during the last half at 30 feet and during ascent to the surface.
#	If complete relief is not obtained within 30 min at 165 feet, switch to Table 4, consulting with a Diving Medical Officer if possible.
Adapted from the US Navy Diving Manual.

Depth (feet)	Time	Breathing Media§	Total Elapsed Time (hrs:min)
165†	_ to 2 hr#	Air	2:00‡
140	_ hr	Air	2:31
120	_ hr	Air	3:02
100	_ hr	Air	3:33
80	_ hr	Air	4:04
60	6 hr	Air or Oxygen/Air	10:05
50	6 hr	"	16:06
40	6 hr	"	22:07
30	12 hr	"	34:08
20	2 hr	"	36:09
10	2 hr	"	38:10
0	1 min	"	38:11

*	Treatment of worsening symptoms during the first 20 minute oxygen breathing period at 60 feet on Table 6, or when symptoms are not relieved within 30 minutes at 165 feet using treatment Table 3 or 6A.
†	Descent rate--as rapidly as possible. Ascent rate--1 minute between stops.
‡	Time 165 feet--includes time from the surface.
§	If only air available--decompress on air. If oxygen available, patient begins oxygen breathing upon arrival at 60 feet with appropriate air breaks. Both tender and patient breathe oxygen beginning 2 hours before leaving 30 feet.
¥	Ensure life support considerations can be met before committing to a Table 4. Internal chamber temperature should be below 85 degrees F 29.4° C.
¶	If oxygen breathing is interrupted, no compensatory lengthening of the table is required.
#	If switching from treatment table VIA at 165 feet, stay the full 2 hours at 165 feet before decompressing.
Adapted from the US Navy Diving Manual.

Depth (feet)	Time (hours)	Breathing Media¥	Total Time (hours)
60	12 hr minimum¥ -no maximum	Oxygen 20 min, air 5 min	12 hours
Ascend 3 ft/hr or two ft every 40 min	6 hours		18 hours
Ascend 2 ft/hr#	10 hours		28 hours
Ascend 1ft/hr	16 hours		44 hours
4 feet	4 hour stop		48 hours
Ascend 1 ft/hr	4 min		48 hours/4 min

*	Used for treatment of unresolved life threatening symptoms after ini valign=toptial treatment on Table 6, 6A, or 4.
†	Use only under the direction of a Diving Medical Officer.
‡	Table begins on arrival at 60 feet. Arrival at 60 feet is accomplished by initial treatment on Table 6, 6A or 4. If initial treatment has progressed to a depth shallower than 60 feet, compress to 60 feet at 25 ft/min to begin table 7.
§	Maximum duration at 60 feet is unlimited. Remain at 60 feet a minimum of 12 hours unless overriding circumstances dictate earlier decompression.
¥	Patient begins oxygen breathing periods at 60 feet. Caregiver need breathe only chamber air throughout. If oxygen breathing is interrupted, no lengthening of the table is required.
¶	Minimum chamber O2 concentration: 19%. Maximum chamber CO2 concentration: 1.5% SEV (12 mm). Maximum temperature: 29.4°C.
#	Decompression starts with a 2 foot upward excursion from 60 to 58 feet. Decompress with stops every 2 feet for the times shown on the above profile. Ascent time between stops is approximately 30 seconds. Stop time begins with ascent from deeper to next shallower step. Stop at 4 feet for 4 hours and then ascend to the surface at 1 ft/minute.
@	Ensure chamber life support requirements can be met before committing to this table.
Adapted from the US Navy Diving Manual.

Depth (feet)	Time (minutes)	Breathing Media¶	Total Elapsed Time (hrs:min)
60†	20	O2§	0:20‡
60	5	Air	0:25
60	20	O2	0:45
60to30	30	O2	1:15
30	5	Air	1:20
30	20	O2	1:40
30	5	Air	1:45
30 to 0	30	O2	2:15

*	Treatment of Type I decompression sickness when symptoms are relieved within 10 minutes at 60 feet and a complete neurological exam is normal.
†	Descent rate--25 ft/min. Ascent rate--1 ft/min. Do not compensate for faster rates by halting the descent.
‡	Time at 60 feet begins on arrival at 60 feet.
§	If oxygen breathing must be interrupted, allow 15 minutes after the reaction has entirely subsided and resume schedule at point of interruption.
¥	If oxygen breathing must be interrupted at 60 feet, switch to Table 6 upon arrival at the 30 foot stop.
¶	Caregiver breathes air throughout unless he has had a hyperbaric exposure within the past 12 hours, in which case he breathes oxygen at 30 feet.

Depth (feet)	Time (minutes)	Breathing Media	Total Elapsed Time (hrs:min)
165†	30 min	Air	0:30‡
140	12 min	Air	0:43
120	12 min	Air	0:56
100	12 min	Air	1:09
80	12 min	Air	1:22
60	30 min	Air	1:53
50	30 min	Air	2:24
40	30 min	Air	2:55
30	720 min	Air	14:56
20	120 min	Air	16:57
10	120 min	Air	18:58
0	1 min	Air	18:59

*	Treatment of Type II symptoms or arterial gas embolism when oxygen unavailable and symptoms are relieved within 30 minutes at 165 feet.
†	Descent rate--as rapidly as possible. Ascent rate--1 minute between stops.
‡	Time at 165 feet--includes time from the surface.
Adapted from the US Navy Diving Manual.