Shops allow OW class in rental gear, including mask/fins/snorkel. Charge an extra $50 for it. Equipment is a bell curve, most inventory is in the most common sizes, opposite ends of sizes get less inventory, i.e. kids and very large adults. Usually first come, first served so kids get stuck with too large BCDs, plus sized divers get stuck with wetsuits that are too restrictive.What I don't know is why her fins would not fit well. Generally, I know shops would require basic equipments to be bought, like mask, snorkel, fins. But this was something she complained about, I was told.
Rental gear is often so very, very old and abused, i.e. full foot fins with torn foot pockets, BCDs with velcro that won't stay attached, don't even get me started on masks and regs.
So, if it was Dive 1 of Day 2, they likely reused a tank from the day before and knew the pressure. Or it was initial descent on Dive 2. Or they were on their "graduation" dive, which would also explain their nonchalance towards finding her. I've heard instructors on multiple instances say something to the effect of, "you're a certified diver now, if you die that's on you". On my OW, I was told to go "dive away" in Athens with 5' vis never having a single guided dive the entire weekend. Only 3 of us in the class opted to do a "fun" dive. 1 of them got to the houseboat at whatever depth, freaked out and bolted back to the surface. Diver 2 would have too, but that was my wife and she wasn't going to leave me alone.Here's where story gets a bit muddy. I was told that they lost her on the initial descent. Obviously, accountability wasn't there to ensure everyone made it to their designated area. Why I feel this is a bit muddy is because when rescue efforts were underway, the frantic person that was driving around asking for help told me that she was last seen with 1050PSI. This doesn't quite add up. How did they know her pressure when they lost her on the first descent? Maybe they did account for her and lost her later? maybe lost her on subsequent descent, where they asked her for her pressure before descending?
I was also told that sense of urgency wasn't there by Scuba Toys when they realized that she wasn't with the group. They disregarded it as not a big deal and kept going with their usual business. After some time have passed, they did report the missing girl, but even then, they weren't really too concerned. Obviously, as more and more time clicked by, that's when things seemed more real and that's when they were expressing concerns.