MaxTorque
Contributor
Mosquito rediscovered 60 years after crash
See above news article. People do this dive on a pony / stage bottle and a single reg and stones for dive weights. The reason being its about 2500 ft above sea level and too far to walk carrying full dive kit. Some even snorkel / free dive a few bits of the tarn.
I know it's totally semantics, but they are not doing the dive on a "pony" really, they are just doing it on a small capacity primary tank ;-)