Shopper What improvements does this computer have over the Atom 2?
LeisurePro S There were teo main changes made to the Atom3, namely the inclusion of a deep stop function with countdown timer and a dual algorithm, which allows you to choose between two different algorithms depending on your diving preferences/needs (DSAT and Buhlmann). There were also some cosmetic changes made to the case, and the Atom 3 is slightly thinner than the Atom 2.