The juveniles believed the discussion was in regards to going back down into the “cave” and whether or not they had enough air in their tanks to complete their dive. One of the divers is believed to have mentioned that he possibly had a leak in his tank.
It's probably a safe assumption they were diving single-tank. However, given this info, they're also diving on partially-full tanks, along with potentially a regulator or valve leak.
One possibility is even that one diver has their regulator fail completely, and they both started with partially full tanks, tried to air-share, but in the process ended up both downing.
“Appeared to have appropriate diving equipment.” Wonder if that means single tank or doubles.
Probably means normal store bought and not home made rigged stuff.
My expectation is that the police simply mean they appeared to have equipment appropriate for diving in general, but not making a "professional" evaluation about whether they were equipped for a specific kind of dive.
According to the IUCCR post on the incident, the incident involved "openwater divers", which would indicate single tanks. The IUCCR recovered the 2nd diver from 137' according to the report.
Maybe, we don't know that. We don't know what dives they were doing. Computer downloads will show that later.
Buford is a beautiful site well suited for open water diving. There is no issue diving there responsibly in a single tank. Down to about 70', it is a vertical ascent to open water.
With the normally clear water and peaceful location, I could easily understand wanting to go for a quick dive.
Just because some choose to break rules doesn't mean everybody should be punished.
I'd be curious to see the depths/downloads as well from both dive-computers. That could indicate a likely cause. Their recovery depths (surface and 137ft) unfortunately doesn't tell us much about what kind of dive they did, just where their bodies ended up.
While I still leave a good percent-chance on "shouldn't have been diving in a cave", I'm also starting to see signs of potentially not-enough air, or an equipment issue. Many scuba-deaths, can be traces to multiple things going wrong at the same time. So it's entirely possible we have (a) inadequate training (b) inadequate air for the dive (c) and equipment failure (d) getting lost and (e) panic all at the same time.
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I'm not trying to start any debates here, but I often see
"never dive alone." However, when two divers die, in a scenario like this, I'm also reminded of
"Buddy diving is like solo-diving, but with a Buddy-hazard." It seems unlikely that both divers would have died, except for the actions or encouragements of one of the divers.