Cave Diving Group
The Cave Diving Group (CDG) is a United Kingdom-based diver training organisation specialising in cave diving. The CDG was founded in 1946 by Graham Balcombe, making it the world's oldest continuing diving club. Graham Balcombe and Jack Sheppard pioneered cave diving in the late 1930s, notably at Wookey Hole in Somerset. Passages through caves are often blocked by a submerged section, or sump. Cavers in many countries have tried to pass these barriers in a variety of ways; using the simple "free dive" with a lungful of air or by utilising the available diving technology of the day.
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Cave Diving Group
The Cave Diving Group (CDG) is a United Kingdom-based diver training organisation specialising in cave diving. The CDG was founded in 1946 by Graham Balcombe, making it the world's oldest continuing diving club. Graham Balcombe and Jack Sheppard pioneered cave diving in the late 1930s, notably at Wookey Hole in Somerset. Passages through caves are often blocked by a submerged section, or sump. Cavers in many countries have tried to pass these barriers in a variety of ways; using the simple "free dive" with a lungful of air or by utilising the available diving technology of the day.
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45xCe modèle est-il pertinent ...... , Northern, Somerset et Welsh.
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The Cave Diving Group (CDG) is ...... diving technology of the day.
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731,584,984
key people
Graham Balcombe
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Central Committee
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45xCe modèle est-il pertinent ...... isation de plongée en grottes.
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The Cave Diving Group (CDG) is ...... diving technology of the day.
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Cave Diving Group
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Cave diving group
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Cave Diving Group of Great Britain
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