Extend your bottom time, shorten your surface intervals and dive deeper on repetitive dives.

Share your adventures and learn how to use underwater strobes, reduce backscatter, safely photograph marine life, and choose photo equipment.

Learn how to control the air in your drysuit, buoyancy, common drysuit problems, and basic repairs and maintenance in order to dive more places.

Reach new depths, discover new dive sites, and learn about deep dive planning, dive limits and gas management.

Find the boat without surfacing, learn how to use a diving compass, and improve your navigation and underwater observation skills.

Find the perfect balance: Dive with less weight, and improve your buoyancy control and air consumption.

Learn how to survey and explore wrecks responsibly with special finning techniques, lines and reels, and avoid common problems.

See the underwater world after sundown and learn how to navigate, ascend and descend, and use your dive light to communicate at night.

Help recover lost items, plan a search operation, improve your navigation skills, learn underwater search techniques and how to use a lift bag.