stiebs
Contributor
I dive with 4kg of lead. I struggle a bit to go down but once I reach 2m with a full tank, it is fine. I hold my 5 m safety stop at the end of the dive with no issue however if I reach 2 meters at the end of the dive, I will surface and will not be able to go down after. Some tell me that I should dive with 5 kg but I refuse.
You found yourself in a bad situation, and you did well to get yourself out. Yes, the DM played a big role in that he should have briefed you about the cavern, made sure you were comfortable with it, and made sure that you had lights.
But as we all know, serious diving accidents are made up of a string of contributing, seemingly inconsequential actions.
For me, the bigger issue issue is your stubborness not to carry extra weight, when you know you need it, and have been told by others that you need it.
Things will go wrong in diving - someone else causing it, the environment causing it, you causing it. But by starting out with a less than ideal situation and attitude, you are always diving one error closer to a serious accident.