From la Repubblica, a story of the deceased divers from the Maldives. A Finnish team managed to recover the final two deceased divers yesterday. All four of the remaining divers were located in the same chamber, more than 200 feet below the surface, and more than 300 linear feet inside the cave. The rescue team has given some insight into what happened to the missing divers. To understand what happened, a map of the underwater cave.

This is a diagram of the cave system, as seen from above, looking down. The divers entered the cave from the right, off of the frame.
The divers entered the cave system at a depth of 180 feet. The cave begins with a first large, very bright cavern with a sandy bottom. It would seem enticing to go further, as this looks very inviting.
They swam through a connecting tunnel from the first chamber to the second. This connecting tunnel is almost 100 feet long, ten feet across, and just three feet tall. It led to the second chamber of the cave, which is a large, round space with no natural light. This second chamber had a depth of over 200 feet. The interior of this chamber would be completely cut off from daylight, and the only visibility would be provided by any handheld lights that the divers had brought with them. The inside of such a chamber is a confusing jumble of rocks, with one rock looking much like any other rock. Even though the water in here was clear, it was a dark, confusing maze of rocks and sand.
At some point, they entered the third chamber (which was a dead end with no way out) through another tunnel whose entrance was right next to the connecting tunnel leading back to the first chamber and the exit. The Finnish team notes that the exit tunnel’s opening was partially obscured from view from the vantage point of a diver in the second chamber by a large pile of sand. It is easy to get over the sandbank into the second chamber, but when you turn around to leave again the bank almost looks like a wall, hiding the corridor from view. The team believes that the divers mistook the tunnel leading to the dead end and their literal death for the tunnel that would lead them to safety.
The divers were only equipped with 80 cubic feet of breathing air. At 200 feet, they would breathe through that supply at 7 times the rate of the surface. By the time they had penetrated the cave to that point, they likely had a minute or two of air left before they all drowned from lack of air.
This reinforces my opinion of what I think happened. These divers were diving beyond their training, experience, and equipment. Had they been properly equipped and trained, they would have stretched a guideline as they went and wouldn’t have gotten lost. They would have had more than just 80 cubic feet of breathing gas, and they wouldn’t be dead.
This was diver error, plain and simple. As I said before, the ocean is an outright jealous bitch, and she shows no mercy to those who do not give her the respect she deserves.
EDITED TO ADD
One of the things that gets me, although it shouldn’t at this point, are the social media experts who are claiming this team had tons of training and experience, so something else must have happened. I have seen theories ranging from “they had bad air” to rogue currents (although how a current runs through a dead end cave, they don’t explain), and even one that claims they were drug there by a large squid to be used as food.
I am not the only experienced diver who actually knows better. It doesn’t take any special disaster to have made this happen- just a combination of inadequate training and experience combined with arrogance of Dunning Krueger and a dangerous environment with a very small margin of error, and that’s all you need.


