I am also a skydiver and we have been using GoPros for quite sometime so I can attest to their quailty. I am wanting to use it for flight instruction as well, my question is, is there a way to have external audio into the video so you can record the cockpit "chatter" as well so my students can hear themselves when they go into controled airspace? Or is this not a function that is offered on a GoPro?