Off the top of my head, rope to put down Gide lines in case you get silted out so you have something to follow to get out.
Also extra everything, if your open water diving and you run out of air (or other critial equipment failure) you can roll the dice on the bends by going straight to the surface, not so with cave diving; your just going to drown.
If I’m not wrong so many people got oxygen poisoning in there and got confused with their path where they came in and out then went in deeper instead of going out when the tank almost empty
Off the top of my head, rope to put down Gide lines in case you get silted out so you have something to follow to get out.
Also extra everything, if your open water diving and you run out of air (or other critial equipment failure) you can roll the dice on the bends by going straight to the surface, not so with cave diving; your just going to drown.
If I’m not wrong so many people got oxygen poisoning in there and got confused with their path where they came in and out then went in deeper instead of going out when the tank almost empty