based on what?
Recreational depth. Safety stop. 500 psi at surface.
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based on what?
You are bloody delusional
Greetings all,
I am a semi-long term visitor to the board and have only recently created an account and officially joined the community. I have a question that will probably indicate my relative lack of experience diving but, as I wish to learn, looking foolish is often part of the learning curve. I have planned a few dives in the next two weeks. I will be diving on Al80s, 3,000 psi, with an EAN32 mix at a location which bottoms out at 109 ft. I do not plan to exceed 100 ft and may not exceed 90ft. I am not sure what my rate of consumption is; I confess that I have never actually calculated it. (I’m an English major so Math is not my strong point). In your combined and considerable experience, what is a conservative (i.e. safe) pressure at which to begin my assent? I know about the rule of threes but I have always understood this to apply to overhead diving (i.e. cave and wreck) but perhaps it would be a good rule to follow here as well. Dividing 1/3rd of my time to reaching the bottom and exploring, 1/3rd for the return trip, and 1/3rd to operate as a safety buffer might be the best logical solution for my situation, though, I don’t know if I would be unduly depriving myself of time that could be spent exploring the dive location. I realize that without knowing my consumption rate this is a difficult question to answer with any degree of accuracy as it relates to me specifically. However, I thought learning what your individual limits are and how you calculate them might help me make an educated judgment based on my own personal factors. I will tell you that I am a larger man who, while not unfit, is not prepared to run a marathon. In that regard my consumption will likely be more rapid than the average diver.
Thanks,
Josh
P.S. I apologize if this question has been asked and answered before. I did a few keyword searches but nothing seemed to provide the information I was looking for. If I have missed a previous conversation that would answer my questions someone please direct me to it so I don’t waste anyone’s time.
From what depth? That blows the most conservative estimate I have ever encountered out of the water.Not knowing your SAC rate isn't all that important, but it isn't ideal. Using rough numbers, you need to technically start ascending at 1800psi.