Otherwise the bubble quickly replica rolex watches

Wysłany: Pon 12:11, 21 Mar 2011

If there is more air in the dry suit than is needed to counteract "squeeze" on the undersuit, that excess air creates a "bubble" which moves to the highest point of the suit;[link widoczny dla zalogowanych] in an upright diver this is the shoulders. In such cases, divers wearing loose baggy suits need to keep their legs at level or below their waist. Otherwise the bubble quickly moves to the highest point, and if the legs are above the waist, the bubble moves into the legs and feet, causing the legs to rise to rise, and "inverting" the diver's body into a head-down position.
The movement of a such a large bubble to the legs can be a problem for a number of reasons: It balloons the legs, and it may inflate thin rubber booties enough to cause fins to pop off; a diver without fins has more restricted ability to move and become upright, and also loses the ability to kick downward to maintain depth, so that the bubble expansion problem does not grow worse. Movement of gas into the legs and feet may also cause special difficulties in drysuits that have air exhaust values only at the shoulders or wrists,[link widoczny dla zalogowanych] because the air in the legs and booties cannot be evacuated while the diver is inverted, and such a diver may be moving toward the surface, causing the problem of expanding air in the suit to grow worse with each meter of lost depth. (Some low-quality bouyancy control devices also cannot valve air, when inverted). If the diver is positively buoyant and rising, the buoyancy of the dry suit becomes uncontrollable after rising though a certain fraction of depth, and there is then an increased risk of a rapid ascent which grows more rapid, as the distance to the surface decrease. The final result of such a run-away inversion is a diver rising all the way to the surface, feet first, in an uncontrolled ascent that is too rapid for decompression safety.? [16]
When the suit is being used correctly, the bubble inside it is relatively small, and its movement is not important. The bubble may be large for a variety of reasons: if a diver has ascended without venting the suit; if the valve supplying gas to dry suit fails in the open position; or if the diver is over-weighted, and extra air has been added to the suit at some point to make the diver neutrally buoyant. The size of the bubble can be minimised by being correctly weighted and venting excess gas from the suit on ascent. Some divers ensure that the bubble remains at the top of their body by using the buoyancy compensator to counteract any excess weighting,[link widoczny dla zalogowanych] keeping only the minimum gas necessary to avoid squeeze inside the drysuit.
The recommended solution in all such "inversion accidents," is for the wearer to bend at the knees and powerfully flap the arms to do a backward or forward roll to the upright position and then vent the suit,[link widoczny dla zalogowanych], if needed, by manually opening the neck seal (sometimes called "burping the suit") by breaking the seal-neck contact with a finger.

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