Schwarzkopf Osis Plus Blow and Go Smooth Blow Dry Spray 200 ml 1720057

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Free ascent is the procedure used in US Navy submarine escape training. However the term is also used for other emergency diver ascent procedures where breathing gas is not available to the diver during the ascent. [3] Drowning is the most likely consequence of a failure to reach the surface during an independent emergency ascent, and is a significant risk even if the diver reaches the surface if he or she loses consciousness on the way. Ascent during which the diver is provided with breathing gas from the same demand valve (second stage regulator) as the donor, and they breathe alternately. The out-of air diver must attract the attention of a nearby diver and request to share air. If the chosen donor has sufficient gas, and is competent to share by this method, an emergency ascent may be accomplished safely. Accurate buoyancy control is still required, and the stress of controlling the ascent rate and maintaining the breathing procedure can be more than some divers can handle. There have been occurrences of uncontrolled ascent and panic, in some cases with fatal consequences to both divers. This procedure is best suited to divers who are well acquainted with each other, well practiced in the procedure, and highly competent in buoyancy control and ascent rate control. [ citation needed] In most circumstances analysis of the risk would indicate that the divers should have an alternative breathing gas source in preference to relying on buddy breathing. Failure to provide alternative breathing gas without good reason would probably be considered negligent in professional diving. Some lung pathologies increase the risk of lung overpressure injury significantly. Divers can inform themselves of these increased risks by undergoing appropriate medical examinations. [ citation needed] Personalised T-Shirt- Any Design ,Any Colour, Any Image, Your own Message, Friends, Funny, College Graduation Unisex Adult Kids Tee Top

Add volume and body to fine hair, or achieve corkscrew curls. Please ask for a complimentary consultation to ensure that your hair is suitable for perming treatment. Keep collections to yourself or inspire other shoppers! Keep in mind that anyone can view public collections - they may also appear in recommendations and other places. Controlled emergency swimming ascent is a technique used by scuba divers as an emergency procedure when a diver has run out of breathing gas in shallow water and must return to the surface. [3] During the ascent, the diver propels him/herself towards the surface at a safe ascent rate by means of swimming, usually finning, with continuous exhalation at a rate unlikely to cause injury to the diver by lung overexpansion, and remains under control.An emergency ascent implies that the dive plan has been abandoned due to circumstances beyond the control of the diver, though they may have been caused by the diver, as is often the case in out-of gas emergencies in scuba diving. [1] Out of gas emergencies are generally the most urgent contingencies in diving, as the available time to deal with the emergency can be measured in minutes or seconds, while most other non-traumatic emergencies allow more time.

In 1977 a formal policy regarding training of emergency ascent procedures was adopted by five major American recreational diver certification agencies: NASDS, NAUI, PADI, SSI and YMCA. [3] ISO 24801 Recreational diving services — Requirements for the training of recreational scuba diversNo other procedures are recommended in this agreement, though the use of a bailout cylinder may be considered effectively equivalent to either octopus assisted ascent, when gas is supplied by a donor, or not actually running out of gas if it is the diver's own bailout set. [3] SSAC [ edit ] The most generally effective method is for each diver to carry an independent bailout set sufficient to safely reach the surface, after completing all required decompression for the planned dive profile. [6] This is relatively expensive and many recreational divers have never been trained in this skill, so there may be unacceptable additional task loading to carry and use the equipment. Also known as octopus assisted ascent, assisted ascent is an emergency ascent during which the diver is provided with breathing gas by another diver via a demand valve other than the one in use by the donor during the ascent. This may be supplied from the same or a different cylinder, and from the same or a separate 1st stage regulator. The divers' breathing patterns are not constrained by each other, and they may breathe simultaneously. Task loading is reduced in comparison with buddy breathing, and the divers can concentrate on controlling the ascent.