Saltwater/Freshwater Question

[E_Mo]

Random question regarding freshwater vs. saltwater...

I know that there is a buoyancy difference when diving freshwater vs. saltwater, since saltwater has all the dissolved minerals. My question is does that affect atmosphere levels? Whenever I read about atmosphere levels, I always see 33 FSW, 66 FSW, etc... When diving in freshwater are there different atmospheric levels, or is the difference (If any) so insignificant the saltwater levels are used?

Thanks

[CaptnJack]

Its does affect pressure but its so ridiculously small that it doesn't matter. For recreational <130ft dives it adds up to about 2 or 3 ft. Depth sensors/gauges are by their very nature less precise than differences in salinity.

[E_Mo]

Thats what I was thinking, but wasn't sure.

Thanks for the help.