Advanced Free Dive Mode
The Aeris CompuMask HUD provides accurate depth and time with an amazing 1-second sampling rate for subsequent PC download and analysis. Dive Time is displayed in seconds and minutes. Custom audible alarms include Elapsed Dive Time, Countdown Timer and (3) Independent Max Depth Alarms. The Aeris CompuMask HUD is the first Free Diving Computer to calculate and track Nitrogen Tissue Loading, allowing you to switch between SCUBA dives and Free Dives on the same dive day.

Patented Air Time Remaining Algorithm
You're at 80 feet with 1300 psi remaining in your cylinder - how long before you need to begin an ascent to a shallower depth? Our patented Air Time Remaining feature calculates your current depth, breathing rate, cylinder pressure, ascent time, and decompression status to tell you exactly how much time you can remain underwater.

AERIS Personal Dive Computer Algorithm
Decompression theory can be trusted only as far as it has been demonstrated by actual test dive data. In 1987 a unique series of experiments were conducted by Diving Science and Technology (DSAT). Commissioned by the Professional Association of Diving Instructors (PADI), these Doppler ultrasound monitored human experiments conducted by Dr. Michael Powell produced the most comprehensive data set that exists for recreational divers to this day. These data were used to validate the PADI Recreational Dive Planner and are the basis of the algorithm used in all AERIS Personal Dive Computers (PDCs).

"The Ultimate Adjustable Algorithm"
That's the way divers, instructors and Authorized Dealers refer to AERIS PDCs. Our tissue loading bar graphs provide complete control of your margin of safety for each dive. Want to be a bit more cautious? Make it a personal rule to never enter into the caution zone; or stay one or more pixel away. Now you can even program several of our PDCs to do it for you with our patent pending Nitrogen Bar Graph Alarm; set it once and let the CompuMask HUD alert you when your bar graph reaches that level.

No Deco Safety Stop Prompt with Adjustable Depth and Time
An audible and visual alarm remind you as you approach your programmed no decompression safety stop depth and an automatic timer counts down to zero. As in any other dive mode, you still have access to other pieces of information, and there is no penalty should you choose to disregard the safety stop.

Alphanumeric Display
An alphanumeric "Message Box" is incorporated in the upper portion of the Aeris CompuMask HUD display to provide text and numeric readouts in simple, unambiguous terms. Imagine beginning an ascent and as the ascent speed increases hearing a warning beep from the Aeris CompuMask HUD as the message box alerts with the words "TOO FAST".

Adjustable OceanGlo Backlighting 
Backlighting may be adjusted before the dive or "on-the-fly" underwater for brightness as well as full-time or on demand use.

24 Dive On-Unit Log Book
The Aeris CompuMask HUD features on-unit data storage capacity for 24 dives. Date and time stamp makes locating and viewing a specific dive quick and easy .

ACI PC Download and Settings Upload Interface
Aeris ACI PC Interface is an exquisitely detailed digital dive log. OceanLog allows you to easily transfer dive data from your Aeris CompuMask HUD to your PC via a plug-in USB cable. Following download, your dive data is automatically formatted for easy viewing, sorting, analysis, and printing. Enter location, dive buddy and your notes and you've instantly created your own digital logbook.