MrBigfins
Contributor
Both back gas and "stage" (don't do deco as of yet so do not have any experience there) Although I don't see a difference in what data you would list on tank regardless of the use of the tank. If I am to use the tank immediately then date and initial are irrelevant to list on tank tape, when picking up tanks from a shop to use at a later date then the additional information of pressure and date etc are more useful.Are you talking about a tank on your back, or a tank that you sling as an additional tank (stage or deco)?
I understand the concept of personal tanks having particular uses and gas mixtures assigned and permanently marked on tank for ease of sorting and gathering gear. That shouldn't change the procedure or information recorded when analyzing the gas mixtures regardless of the tanks intended use ie. Back gas, stage or deco