The diving file contains collection objects and written documents of the development of sporting as well as professional diving (particularly from the period of 50s to 70s of this century). The collection shows different types of flippers, respiration apparatuses, respiration tubes, mouthpieces, dresses, masks, underwater lamps, diver's helmets, weights, depth gauges and three diving cabins. The collection includes also older objects - i.a. diving suit with copper helmet, weight boots, phone station and unique apparatus for swimming just under the water surface from the period between the Wars.