Students from the biology, marine science and animal science departments take part in a Cal Poly Scientific Diving Course in 2019. Students learn both the theoretical and practical aspects of diving. In the classroom, they study diving physics and physiology, decompression theory, the history of the American Academy of Underwater Sciences and underwater data collection techniques. In the field, students make multiple dives, applying techniques in low-visibility navigation, search and salvage and deep and night diving, and employing specialized skills for sampling and identifying local fish, invertebrates and algae. (Photo: Joe Johnston)