Not a tech diver just thinking, and was wondering with all the different Deco software out there how do individuals plan a dive if they are using different software? And what if the divers are using different gases, say one on trimix the other doing deep air. I am not looking for an answer of what agency the individuals were taught by I understand that side of it just wondering if two people were diving and they were not exactly diving the same software or had other variations how would they plan the dive. As I said above say one was only diving air and the other on mixed gases of some other variety.