I don't have a protocol for decompression on air with that much time at that depth. The last protocol I have (several years old) is only for heliox, but it would require about 30 hours to decompress from 100 fsw. I would expect that twice that (the 60 hours given) would be appropriate on air. That would make a 30 m depth seem reasonable. It sure would be nice to know. It would be nice to know if the dive company had tables for air, found them somewhere or if they made it up on the fly. Most likely, I would think, they called home and someone went to the archives to find them.

Respectfully,

Jerry