9-52 Change AU.S. Navy Diving Manual—Volume 2The planned increase in altitude is 3000 feet. Enter Table 9-5 at 3000 feet and readdown to Repetitive Group K. The diver must delay 6 hours and 25 minutes beforetaking the flight.Table 9-5. Required Surface Interval Before Ascent to Altitude After Diving.RepetitiveGroupDesignatorIncrease in Altitude10002000300040005000600070008000900010000A0:000:000:000:000:000:000:000:000:000:00B0:000:000:000:000:000:000:000:000:002:11C0:000:000:000:000:000:000:000:003:068:26D0:000:000:000:000:000:000:093:287:3312:52E0:000:000:000:000:000:513:356:5410:5916:18F0:000:000:000:001:123:406:23 9:4313:4719:07G0:000:000:001:233:346:028:4612:0516:1021:29H0:000:001:313:265:378:0510:4914:0918:1323:33I0:001:323:205:157:269:5412:3815:5820:0224:00J1:323:094:576:529:0411:3214:1617:3521:3924:00K3:004:376:258:2010:3213:0015:4419:0323:0724:00L4:215:577:469:4111:5214:2017:0420:2324:0024:00M5:357:119:0010:5513:0615:3418:1821:3724:0024:00N6:438:2010:0812:0314:1416:4219:2622:4624:0024:00O7:479:2411:1213:0715:1817:4620:3023:4924:0024:00Z8:179:5411:4213:3715:4918:1721:0124:0024:0024:00Exceptional ExposureWait 48 hours before flyingNOTE 1 When using Table 9-5, use the highest repetitive group designator obtained in the previous 24-hourperiod.NOTE 2 Table 9-5 may only be used when the maximum altitude achieved is 10,000 feet or less. For ascentsabove 10,000 feet, consult NAVSEA 00C for guidance.NOTE 3 The cabin pressure in commercial aircraft is maintained at a constant value regardless of the actualaltitude of the flight. Though cabin pressure varies somewhat with aircraft type, the nominal value is8,000 feet. For commercial flights, use a final altitude of 8000 feet to compute the required surfaceinterval before flying.NOTE 4 No surface interval is required before taking a commercial flight if the dive site is at 8000 feet orhigher. In this case, flying results in an increase in atmospheric pressure rather than a decrease.NOTE 5 No repetitive group is given for air dives with surface decompression on oxygen or air. For these sur-face decompression dives, enter the standard air table with the sea level equivalent depth and bottomtime of the dive to obtain the appropriate repetitive group designator to be used.NOTE 6 For ascent to altitude following a non-staturation helium-oxygen dive, wait 12 hours if the dive was ano-decompression dive. Wait 24 hours if the dive was a decompression dive.
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