The information displayed by a computer changes depending on whether you're diving, are at the surface, or have exceeded your maximum dive time. Additionally, there are features you can access while at the surface that enable you to plan your next dive or review your dive history.

The pages that follow illustrate and describe the typical information displayed by the various display modes. Before continuing, it's important to note that the layout and information displayed varies between computers. This information is provided only as an introduction to computers in general, and does not substitute for the computer's user's manual.