Mares Sirius Dive ComputerSirius Dive Computer The Sirius is a watch style dive computer that perfectly combines technology and elegance. The characteristics of this dive computer feature top of the range technology both for the recreational and Extended Range diver. The recreational diver can see dive data in a simple, intuitive way, with the possibility of integrating tank data using the optional tank module. The Extended Range diver can insert up to five nitrox and trimix