The VPM (Varying Permeability Model) and the BUHLMANN model in SCUBA diving planning
Scuba diving is a popular recreational activity that allows people to explore the underwater world. However, it is a dangerous activity that requires proper training and equipment to ensure the safety of the divers. One important aspect of diving is the calculation of dive profiles, which involves determining the amount of time that a diver can safely spend at different depths. There are two main models used for calculating dive profiles: the VP M (Varying Permeability Model ) and the BUHLMANN model. Both models are used to predict the maximum operating depth (MOD) and the no-decompression limit (NDL) for a diver. The VPM model was developed by Dr. Bill Stone and Dr. Pete Ekstrom in the 1980s. It is based on the idea that the permeability of gases in the body changes with depth and time. The model takes into account the effect of tissue compartments on the absorption and elimination of gases, and it predicts the risk of decompression sickness (DCS) based on the diver's dive profil...