2. 1.- WHAT’S SCUBA DIVING? 2.- DIVING HISTORY 3.- EQUIPMENT FOR DIVING 4.- UNDERWATER PHOTOGRAPHY EQUIPMENT 5.- THE CIES ISLANDS: THE MARINE HABITAT 6.- UNDERWATER PHOTOS OF THE CIES ISLANDS SUMMARY
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4. Early Diving Equipment Ancient swimmers used cut hollow reeds to breathe air, the first rudimentary snorkel used to enhance our abilities underwater. Around 1300, Persian divers were making rudimentary eye goggles from the thinly sliced and polished shells of marine turtles. By the 16th century, wooden barrels were used as primitive diving bells. More Than One Breath In 1771, British engineer, John Smeaton invented the air pump. A hose was connected between the air pump and the diving barrel, allowing air to be pumped to the diver. In 1876, Englishmen Henry Fleuss invented a closed circuit, oxygen rebreather. Fleuss then decided to use his invention for a thirty-foot deep dive underwater. He died from the pure oxygen (oxygen is toxic to humans under pressure). Rigid Diving Suits In 1873, Denayrouze built a new piece of equipment a rigid diving suit with a safer air supply, however it weighed about 200 pounds. 2.- DIVING HISTORY
5. Houdini Suit - 1921 Famous magician and escape artist, Harry Houdini was also an inventor. Houdini's invention for a diver's suit permitted divers, in case of danger, to quickly release themselves of the suit and to safely escape and reach the surface of the water. Jacques Cousteau & Emile Gagnan Emile Gagnan and Jacques Cousteau invented the modern demand regulator and an improved autonomous diving suit. In 1942, redesigned a car regulator and invented a demand regulator that would automatically fresh air when a diver breathed.
24. CIES ISLANDS UNDERWATER PHOTOS by Jorge Hernández Urcera
25. Now we are going to discover some of the fantastic animals that live in The Cíes Islands seabed
26. MOST OF THESE PHOTOS WERE TAKEN IN THIS SPOTS: 1. - El Ruso. 2. - El Príncipe. 3. - Monteagudo. 4. - Islote de Viños. 5. - Los Ciegos. 6. - Bajo San Martiño. 7. - Pared de San Martiño.
