​​  702-452-5723

Our Business

AAI Neptune Divers was founded in 1992 as the second store for Neptune Divers. In the beginning, the letters AAI stood for American Aquatics Institute, which placed us first in the phone book. Today we just use the first letters and Neptune Divers.  The facility is located on the North-East side of Las Vegas at the base of Sunrise Mt. It is owned and operated by Stephen Castle, an NAUI Scuba Diving Instructor and Course Director. The two stores soon became a main-stay for the Southern Nevada community. The Henderson facility, however, was sold in 2003 leaving just the Las Vegas facility. Today it is the only primer full-service NAUI Pro facility with a Course Director on staff. As a Pro Facility, we can train and educate divers all the way from the new beginner through Scuba Instructor status. AAI Neptune Divers also holds a permit to preform salvage at Lake Mead NP, and has over 50,000 lbs. of lift and can handle the most demanding of jobs. Traveling to exotic locals has become a large part of our business, with exciting trips going overseas several times a year. We are sure that AAI Neptune Divers has the best-trained staff found anywhere. Stop in and meet our friendly staff and check out our top of the line inventory.


Our Staff

Stephen B Castdle

 NAUI Course Director 10670  DAN, PSDA&WR 325

Stephen Castle learned to dive 1985. In 1988 he became an NAUI Scuba Instructor. He
opened AAI Neptune Divers in 1992. In 1994 he became a Course Director for NAUI. In 1996 he was one of the first 1000 instructors for TDI but dropped TDI/SDI (#930) over a dispute with TDI Headquarters in 2014 when they did not condone him teaching for other agencies. In 1999 he Became a Public Safety Diving instructor for PSDA (#325) and has taught several police departments. He is a mix gas blender, DAN instructor, equipment repairman, and lots more. Stephen holds a BS in Aviation, is a pilot, has taught collage,  and is a car enthusiast. NAUI 10670, PSDA 325, DAN, ex TDI/SDI 930.


Keith M. Baker
PADI Master Instructor #30098
Initial certification in 1973 - PAID & NAUI Current dives - 3000+
Master Instructor
Master Scuba Diver Trainer IDC Staff Instructor
Open Water Scuba Instructor Assistant Instructor Divemaster
DSD Leader
EFR Instructor
Public Safety Diver Instructor Equipment Specialist Instructor Altitude Instructor
Boat Instructor
Drift Instructor
Night Diver Instructor
Dry Suit Instructor
Sidemount Instructor
Wreck Instructor
Underwater Videographer Instructor Underwater Photographer Instructor
Deep Instructor
Digital Underwater Photography Instructor Enriched Air Instructor
Underwater Navigator Instructor
Search & Recovery Instructor
Care for Children w/AED Instructor
Peak Performance Buoyancy Instructor
Project Aware Instructor
AWARE Coral Reef Conservation Sp Instructor Marine Life Injuries Instructor
O2 ADMINISTRATION & FIRST AID INSTRUCTOR On-Site Neurological Assessment For Divers
AED For Divers Instructor
Full Face Mask Instructor
Florida Keys Wreck Instructor
SPIEGEL GROVE DIVER INSTRUCTOR
Self-Reliant Diver Instructor
Divers Alert Certifications (Instructor Trainer)
Basic Life Support: CPR and First Aid Active CPR: Health Care Provider
Diving First Aid for Professional Divers Emergency Oxygen for Scuba Diving Injuries First Aid for Hazardous Marine Life Injuries Neurological Assessment 



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