As the sun sets, you don your dive gear, slip on your scuba mask and bite down on your dive regulator. A deep breath and you step off the boat – into the underwater night. Although you've seen this reef many times before, this time you drop into a whole new world and watch it come to life under the glow of your dive light.

Be the diver everyone wants to follow and make your sense of direction legendary with the PADI Underwater Navigator Specialty course.

Underwater photography is one of the most popular diving specialties, and the rise of digital underwater photography has made it easier and more fun than ever. This is why there are actually two PADI underwater photography courses. The PADI Digital Underwater Photographer course gets you going quickly with today modern digital equipment, whether you use a point-and-shoot snap camera or a sophisticated D-SLR like the pros. The PADI Underwater Photographer course is a more traditional photography course designed for conventional film equipment.

After your first few scuba dives, you soon want to explore a bit deeper. There's something exciting and mysterious about the depth that attracts dives.

What is neutral buoyancy? Scuba divers like to be neutrally buoyant so they neither sink nor float. It can be a tricky thing. Divers who've mastered the highest performance levels in buoyancy stand apart. You've seen them underwater. They glide effortlessly, use less air and ascend, descend or hover, almost as if by thought. They interact gently with aquatic life and affect their surroundings minimally. The PADI Peak Performance Buoyancy course refines the basic skills you learned as a PADI Open Water Diver and elevates them to the next level.

The PADI Enriched Air Diver course is PADI's most popular specialty scuba diving course, and it's easy to see why. Scuba diving with enriched air nitrox gives you more no decompression dive time. This means more time underwater, especially on repetitive scuba dives. You can typically stay down longer and get back the water sooner. No wonder many divers choose this as their very first specialty.

Have you ever dropped something in the water? Are you looking for lost "treasure"? The PADI Search and Recovery Diver Specialty course will teach you effective ways to find objects underwater and bring them to the surface. Small, large or just awkward, there is a way to bring them up.

Don't miss a dive due to a scuba gear issue. Whether it's a blown o-ring, regulator problem, wetsuit tear or a broken fin strap, you can learn how to manage basic scuba equipment adjustments. As a PADI Equipment Specialist, you are prepared for the basic scuba equipment maintenance, care and adjustments you'll encounter every day. In addition, you'll learn interesting background information about how your gear works, how it's repair and other information that helps you with your equipment investment.

Look closer to see more on your next dive. Look for symbioses, predator/prey and other relationships between aquatic plant and animal life. Learn not just what fish and animals are, but how they interact with each other and the environment. Learn about why some creatures behave the way they do and what their role is in the aquatic ecosystem.

Whether you've never made a boat dive or you've logged dozens, the PADI Boat Diver Specialty course can benefit almost every diver because different boats in different parts of the world do things differently.

Be the one ready to help a fellow diver should the need arise by becoming a PADI Emergency Oxygen Provider. Breathe easy—knowing that you know how to recognize illnesses treatable by emergency oxygen. Being the best buddy you can be means being prepared – especially in a time of need.

Maximize your dive time so you can explore more! In this course, you learn how to plan dives that extend your bottom time by crediting you for slower nitrogen absorption when you ascend to a shallower depth. That's the way you really dive, after all.