We have become dependent on our Dive Computers to the point that many divers do not even own a set of Dive Tables anymore. However, the Safe Diver always has a Backup Plan, just in case. Make sure you have a set of Dive Tables in your Save-A-Dive Kit just in case your Computer suffers some "Technical Difficulties".
If you Dive NITROX, your best bet to preserve your Safety is to use the NOAA developed Tables that all others have been developed from The National Oceanic and Atmospheric Administration (NOAA) sets the Standards for all the Training Organizations Recognized in the US. Table is Set-Up in the basic 3 Chart Format, and is Easy-to-Follow to make Single or Repetitive Dives. Tables can be used for Imperial (feet) or Metric (meters) Dive Depth Calculations. This NOAA NITROX 32% Diving Table is Waterproof Plastic and has an Eyelet for Attachment of a Lanyard. The Tables measure 7" x 9" (17.8 x 22.9 cm).