[Adrian]

Holger,
That was the reason that made me find DB. I couldn't equalize deeper than 8 meters with Valsalva until someone on the board told me to try leveling out and equalizing when horizontal. That allowed me to get to 13 meters but it would take a long time to getto the bottom - It was very curvy diving. Frustrated, I learnt the Frenzel from Erics paper and now it's only my failure depth that limits me, I need to practice keeping that last mouthful of air from going back into the lungs!

Adrian