Alternative solutions

The pony canteen is a antecedent of back-up by accouterment an another antecedent of breath gas for the diver as an able advancement to his/her primary gas accumulation in the accident of abortion of the primary system. The pony canteen is advised for use in "bail out" situations – situations in which the dive have to be aborted and safe acknowledgment to the apparent have to be facilitated. There are several another solutions to accouterment such a bombastic gas accumulation for bond out purposes which are in accepted use in diving. These alternatives are listed in the afterward table forth with a appraisal on how these solutions analyze with pony canteen acceptance as a advancement system:

Alternative air source Comparative functionality

Octopus The octopus is an added bombastic additional date regulator taken off the absolute aboriginal date regulator and absolute primary air supply. Because of this, a abortion of the aboriginal date regulator or the burnout of the gas accumulation from the primary catchbasin makes this band-aid inferior to a absolutely bombastic breath gas arrangement such as a pony bottle.

H and Y colonnade valves The primary catchbasin can be adapted with a valve with two abstracted controllable outlets, both of which can arise its own aboriginal date regulator. One aperture is affiliated to the primary additional date regulator, the added to the octopus. This eliminates the crisis of abortion in a individual first-stage system. It does not abate the accident of accident of breath gas from the individual primary gas supply.

Doubles Using a accompanying catchbasin arrangement with isolating assorted provides abounding back-up in gas accumulation as able-bodied as the adeptness to abstract any adulterated apparatus which ability be aperture abroad breath gas. Doubles aswell accommodate abundant greater accommodation than pony bottles. However, because the gas in the arrangement is aswell for use during the dive itself it requires that the diver pays added absorption to gas administration to ensure that an able aggregate of assets is accessible for any bailout claim at any appearance of the dive. However, if the additional catchbasin alone serves the purpose of bailout, the diver is abounding with ample added aggregate and weight which is not appropriate in a abate pony canteen system.