A poll, sort of.
when you dive, do you turn on your air and then back off a quarter of a turn? Why and why not? How many of you do it because your instructor says so? If so, did he or she explain why?
when you dive, do you turn on your air and then back off a quarter of a turn? Why and why not? How many of you do it because your instructor says so? If so, did he or she explain why?