No back light, but does glow when exposed to light. Default when in nitrox mode is 50 percent oxygen and 79 percent nitrogen. Although this is a new computer to Sherwood, it is clearly based on obsolete technology. The AWAC-1 is conservative on shallow single dives, liberal on single deep dives and average on multilevel dives. The computer should work correctly without the need to be reset.
Instructions are good, but some information is unclear.
Intuitive bar graphs with three-color highlighting. Excellent back light that works both under water and topside. Wealth of user settings. Excellent PC interface program. User-selected gauge mode for special tech situations.