I want to say to Ravenware, how my heart goes out to you and your husband. You did the right thing. You tried to help, and quickly realized that you could not without jeopardizing your own safety, you ascended and quickly signaled for help. I can not imagine how hard this is for you. You have the support of your fellow divers.
It is tragic and my heart goes out to this young woman and her family.
With that being said, I do need to ask a couple of questions to the group here.
First of all, I live in Cozumel full time, I have been diving in Cozumel for 22 years and moved here five years ago.
I have read through a lot of these comments and I see several things that are very concerning to me.
First and most importantly -- How many times did divers here on this board mention in other comments about the "faulty, stuck or disconnected", power inflator valve?? (Speculative at this point, but let's explore that situation.)
Out of those of you that made that comment to the fact, how many of you have over 50 scuba dives? Or have advanced certifications? As tragic as this is, there is a very disturbing issue here and one I hope that I can bring to light, before someone else makes a mistake. PLEASE!
The inflator valve is connected to a LOW PRESSURE hose. Please think about that for a moment.
1.) If the inflator button gets stuck, you can easily disconnect the hose underwater.
2.) Many people can easily reconnect the hose underwater (most of the time).
3.) If you can not reconnect the hose underwater, then you can easily manually inflate your BC, orally!! This is one of the first things you learn to do when you get certified.
If you have somehow forgotten this basic skill/exercise when you first got certified, then you need to get into a pool or a safe shallow area and PRACTICE this skill. I am shocked how many people are bringing this up as if it weren't easily resolved above or underwater! To me, that is extremely concerning.
PS DiverJ1234 - You said you don't speak Spanish, (at least by your comment it appears you do not) and, as you stated, you are relatively inexperienced divers, then why are making all these assumptions (too many too even start listing here). It is a VERY unfortunate and sad event but you are not helping anything by quoting "rumor" as you stated and making speculations (based on what fact). I am very sorry for everyone involved but I do not see how you are helping the situation at all. I am so sorry you were witness to this tragedy.