Shopper why is this considered a "Back Up" computer, can it be used for your main computer? What is it missing that a primary computer includes?
Brett H It is designed to be used as a backup because it is adjustable to read close to just about any dive computer that you may already own and it has a few less features than you will find on other computers. Mainly it does not have an audible alarm and it is not downloadable to your home pc. That said, could you dive with it as your only dive computer? yes you could.