Incident Report

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Incident Report 2020-05-01T16:26:00+00:00

Frozen and free-flowing regulators

Incident Date

1905-06-06

Incident Description

On a very cold day after his diving equipment had been left in the car overnight the diver noted ice forming on the first stages on entering the water. Heading upstream the diver was approximately 60m from base when the regulator in use started to free-flow. The diver switched the tap for the offending regulator off and swapped to the other regulator while turning round and heading for the entrance. After a few breaths the second regulator now started free-flowing. This was also switched off at the tap and swapped back to the first regulator while switching this tap on. This still free-flowed so the exit was made using the tap to supply air whilst keeping air waste to a minimum.

Lessons Learned

Avoid leaving regulators in cars overnight in winter where they will become extremely cold. Consider using anti-freeze caps (even though I never have!) Remember to stay cool and that hand driving the taps is not too dificult.
Factors
Line Management Unknown
Gas Management Unknown
Equipment Management Unknown
Equipment Failure Major
Training Unknown
Medical Unknown
Planning Major
Procedural Error Unknown
Cave Environment Minor
Weather Major
Other Factor Unknown