Hello All, I am a newly certified diver and just purchased my first basic set of dive gear. Instead of an octopus, my BCD has a breathable gemini power inflator. My question is: If a situation occurs in which I find myself breathing off of my power inflator, how can I use it to control ascent? During training, we were taught to hold it above our heads and either inflate or deflate as needed, but this seems hard to do if it is in ones mouth. Also, if I do need to put any air into my BCD can I take a breath at the same time? Thanks ahead of time for responses!