2. Diving technology SCUBA (Self Contained Underwater Breathing Apparatus) System used to “breathe underwater” Jacques Cousteau and Emile Gagnan 1943

3. Diving technology Rebreather recycle the breathing gas Freeflowing surface supply diving large high flow Inefficent Surface controlled Demand regulator Lowers air pressure in tube Gives air in increments First version created in 1838

4. Diving Technology Pressure Gauge Air pressure Air left BCD Buoyancy Compensator Device Makes diving eaisier

5. Types of Diving Surface supplied diving Supplied from the surface Limited depth Support platform Mixed-gas diving Avoid nitrogen narcosis Heliox (deep) NOT Nitrox