7-36 Change AU.S. Navy Diving Manual—Volume 2dive partner’s mouthpiece. The dive partner guides it to the distressed diver’smouth. Both divers maintain direct hand contact on the mouthpiece.4.The mouthpiece may have flooded during the transfer. In this case, clear themouthpiece by using the purge button (if single-hose) or by exhaling into themouthpiece before a breath can be taken. If using a double-hose regulator, themouthpiece should be kept slightly higher than the regulator so that free-flowing air will help keep the mouthpiece clear.5.The distressed diver should take two full breaths (exercising caution in theevent that all of the water has not been purged) and guide the mouthpiece backto the partner. The partner should then purge the mouthpiece as necessary andtake two breaths.6.The divers should repeat the breathing cycle and establish a smooth rhythm.No attempt should be made to surface until the cycle is stabilized and theproper signals have been exchanged.WARNINGDuring ascent, the diver without the mouthpiece must exhale to offsetthe effect of decreasing pressure on the lungs which could cause an airembolism.7-7.8Tending. 7-7.8.1Tending with a Surface or Buddy Line. When a diver is being tended by a linefrom the surface or a buddy line, several basic considerations apply.Lines should be kept free of slack.Line signals must be given in accordance with the procedures given in Table8-3.Any signals via the line must be acknowledged immediately by returning thesame signal.The tender should signal the diver with a single pull every 2 or 3 minutes todetermine that the diver is all right. A return signal of one pull indicates thatthe diver is all right.If the diver fails to respond to line-pull signals after several attempts, thestandby diver must investigate immediately.The diver must be particularly aware of the possibilities for the line becomingsnagged or entangled.
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