 They are transported if necessary (e.g.by SAR helicopters in low-altitude flight) to Kiel, to the largest pressure chamber of the German Federal Navy, in which up to 12 people can be subjected to pressure, as a simulation of deep diving as part of training, or to treat decompression sickness.For this reason and due to the outstanding training, the number and the consequences of serious and deadly diving accidents with the mine clearance divers in the German navy are remarkably small compared to the comparable units in other countries.