Side underwater shot of a woman in scuba gear in a pool, she turns to the camera and waves in the sun's glare, then continues swimming

dive diving suit scuba gear diving class scuba dive apprentice underwater swimming pool breathe scuba equipment wetsuit regulator mask snorkel diving equipment certification first class recreational diver adventure hobby water sport dive center scuba lessons pool sessions learning to dive beginner training depth buoyancy shallow water training displacement techniques floating techniques body positioning knowledge of safety rules underwater navigation underwater orientation breath control equalization pressure sun glare waving buddy diving woman adequate decompression flippers underwater communication nitrogen saturation