We just did this last week. We did it sitting on the bottom and tossed the tank over the top. Almost identical to what we do on land except a lot less weight. So why would you call it diving under?dherbman:But in the water, it takes no strength at all. In effect, you are not 'lifting over', you are 'diving under'.
If you lay the tank on the bottom and flip your body into it you might call it diving under it. But that isn't a good approach.
Also, this is a skill that should be practiced with a blacked out mask.
Gary D.