Decompression time is a function of depth, time, and N2 concentration. (Yes, O2 matters for because of O2 toxicity, but that's not a decompression issue.) Scu

Decompression time is a function of depth, time, and N2 concentration. (Yes, O2 matters for because of O2 toxicity, but that's not a decompression issue.) Scuba can let you breathe different mixtures than the standard atmosphere but need not increase decompression time.