Pony bottle

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A pony bottle (left) attached to a larger cylinder
A pony bottle (left) attached to a larger cylinder

A pony bottle is a small diving cylinder, often of only a few litres capacity, which is filled from a main tank before a dive and fitted with its own independent regulator. In an emergency, such as exhaustion of the diver's main air supply, it can be used as an alternate air source during emergency ascent.

[edit] References

  • Busuttili, Mike; Trevor Davies, Peter Edmead et al (1959). Sport Diving. BSAC, 72,130. ISBN 0091864291. 
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