The dive plan has changed and you need to knock your mix down to enable a deeper dive profile. Use the Bleed Down tool to reduce the mix with a minimum of wasted O2.
You can make the calculations using any available mix that you might have banked or oxygen compatible air by adjusting the “Top With” input value.
Tap on the bookmark icon to recall a previously saved calculation or to save this calculation for future use.
You can easily make the calculations using Metric or Imperial/US units by selecting the “Settings” tab (if it is not visible on the current screen select “More”) and changing the system to the one desired.