OK, it sounds like the statement in the US Navy Diving Manual does not apply to dive computers but relates to the mental shortcuts that metric users take in their calculations. IE: 10M = 1 ATM = 1 Bar, which is pretty close but not exact. I see nothing wrong with that for recreational divers estimating gas consumption or even decompression off tables but I found hard to believe that dive computers would be programmed that way.
Thanks all, I learned a bit. The Navy manual is not entirely incorrect but could be phrased more precisely given the almost universal prevalence of dive computers now. Example:
10MSW is not defined by the Metric system as 1 Bar, even the EU for dive computers. Divers using Metric tend to use it that way for rough calculations, computers don't. I think I will send an E-mail to NEDU.
It is interesting that Bars are no longer the proper (preferred?) Metric unit for pressure. I suspect it will be around a very long time for diving and weather since Pascals do convert evenly (by a factor of 10) to Bars but requires a lot more shifting of the decimal. The part that I always thought was strange is that one Bar is not an accurate conversion to the Standard Atmosphere, even though it was invented to measure atmospheric pressure -- IE the Millibar.
Thanks all, I learned a bit. The Navy manual is not entirely incorrect but could be phrased more precisely given the almost universal prevalence of dive computers now. Example:
3. In the metric system, 10 MSW is defined as 1 BAR.
10MSW is not defined by the Metric system as 1 Bar, even the EU for dive computers. Divers using Metric tend to use it that way for rough calculations, computers don't. I think I will send an E-mail to NEDU.
It is interesting that Bars are no longer the proper (preferred?) Metric unit for pressure. I suspect it will be around a very long time for diving and weather since Pascals do convert evenly (by a factor of 10) to Bars but requires a lot more shifting of the decimal. The part that I always thought was strange is that one Bar is not an accurate conversion to the Standard Atmosphere, even though it was invented to measure atmospheric pressure -- IE the Millibar.