tables. 3. If you wish to continue using a computer, rent the computer that is available and take it with you. Be sure to use your tables for the first day, give yourself an ample surface interval before returning to diving the next day to be sure you have cleared the nitrogen. 18-24 hours. 1.) I would complete the current dive based on my dive plan, bottom timer, and SPG 2.) I would do the rest of the planned dives that day based on dive plans made with V-Planner, bottom timer, and SPG 3.) I would do the rest of the planned dives that week based on dive plans made with V-Planner, bottom timer, and SPG If you actually plan your dives... a computer failure is a mere nuisance. As most of these people said. Tables. I plan all my dives on tables anyway. The computer is a back up. Also try to dive square profiles whenever possible. Don't need to dip into every little valley and follow every contour. You can also use depth averaging and tables. Do multilevel dives with the tables or find an old PADI wheel and learn to use it. Dive with a back up bottom timer or cheap computer in gauge mode. Cheap, gives you all the info you need, and as long as you pay attention to it, no big deal if the main craps out. Cut one of your afternoon dives out. You should be paying attention to your surface intervals and