Frogman Training
Training armed forces divers, including combat divers, is often harder, longer, and more complicated than civilian sport scuba diver training, typically takes several months full-time, and the trainees must be at full armed forces fitness and discipline at the start. It needs much higher levels of fitness, and during the course there is often a high elimination rate of trainees who do not make the grade. For more details see the articles on each nation's frogman group below and their external links.
Typically, a frogman with closed circuit breathing equipment will stay within 8 metres (26 ft) due to the risk of oxygen poisoning. For comparison, trained and properly educated recreational divers with open circuit equipment can dive to 50 metres (160 ft) or more.
In some cases, well-trained and experienced amateur divers can - legislation permitting - be capable of accomplishing tasks that regulations forbid professional divers from undertaking. As an example, Simon Mitchell was able to conduct a search for the engine of a crashed helicopter at 74 metres (243 ft), when naval or police divers could not.
Read more about this topic: Combat Diving
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