One of the most common errors I witness as an Instructor is calculating the correct Total Bottom Time on the Recreational Dive Planner. The failure to add Residual Nitrogen Times to the Actual Bottom Time leaves the diver with an increasing accumulation of nitrogen in the body. Why is this a problem? It exposes the diver to the possibilities of Decompression Illness which could lead to serious harm to the diver. Why is calculating Total Bottom … Read entire article »