History of decompression research and development range of commercial, military and recreational diving. The first recorded experimental work related to decompression was conducted by Robert Boyle, who subjected experimental animals to reduced ambient pressure by use of a primitive vacuum pump. In the earliest experiments the subjects died from asphyxiation, but in later experiments, signs of what was later to become known as decompression sickness were observed. Later, when technological advances allowed the use of pressurisation of mines and caissons to exclude water ingress, miners were observed to present symptoms of what would become known as caisson disease, the bends, and decompression sickness. Once it was
Scuba Schools International Assistant Instructor) followed by Open Water Instructor and above. SSI's training program for children aged 8–12 years is called Scuba Rangers. The training program for technical divers is called TechXR (Technical Extended Range) and includes decompression diving, trimix and other courses that exceed the limit for recreational divers. SSI scuba certifications are recognized throughout the world (such as RSTC - Recreational Scuba Training Council, EUF - European Underwater Federation, CUA - China Underwater Association and others). SSI was founded by Robert Clark in 1970, and was one of the pioneers of professional scuba training. They were the first organization to