Prolonged deep-sea diving was first made possible in Europe by the invention of a diving bell in what century?
History of underwater diving of Ethicus the astronomer. The earliest applications were probably for commercial sponge fishing. Diving bells were developed in the 16th and 17th century as the first significant mechanical aid to underwater diving. They were rigid chambers lowered into the water and ballasted to remain upright in the water and to sink even when full of air. The first reliably recorded use of a diving bell was by Guglielmo de Lorena in 1535 to explore Caligula's barges in Lake Nemi. In 1616, Franz Kessler built an improved diving bell. In 1658, Albrecht von Treileben was contracted by King Gustavus Adolphus of
Diving helmet including making the helmet be detachable from the corset; his improved design gave rise to the typical standard diving dress which revolutionised underwater civil engineering, underwater salvage, commercial diving and naval diving. Commercial diver and inventor Joe Savoie is credited with inventing the neck dam in the 1960s, which made possible a new era of lightweight helmets, including the Kirby Morgan Superlite series (an adaption of Morgan's existing "Band Mask" into a full helmet.) Savoie chose not to patent his invention because of his desire to improve diver safety. Historically, deep sea diving helmets ranged from the no bolt to