It is possible for a dive computer to malfunction during a dive. If the diver has been monitoring decompression status and is within the no-decompression limits, a computer failure can be safely managed by simply surfacing at the recommended ascent rate, and if possible, doing a short safety stop near the surface. If, however the computer could fail while the diver has a decompression obligation, or cannot make a direct ascent, some form of backup is prudent. The dive computer can be considered safety-critical equipment when there is a significant decompression obligation, as failure without some form of backup system can expose the diver to a risk of severe injury or death.