Atlantis Rangers Dive Club
- The Atlantis Rangers Dive Club is a non-profit club located in Green Belt and founded in 1959.
- http://www.atlantisrangers.org/

Underwater Terps SCUBA Diving Club
- A Scuba Diving club located @ the University of Maryland with a goal to go diving!
- http://www.underwaterterps.com/

East Coast Diver LLC Home
- Course offerings and pricing for independent Scuba instructor as well as photos and general dive information.
- http://www.eastcoastdiverllc.com

DiveSafety
- Based in Annapolis with information on technical training, including decompression, technical nitrox, extended range, cavern and cave diving.
- http://www.divesafety.net/

SK Divers
- PADI instruction and dive travel. Dive schedule, services and web specials.
- http://www.skdivers.com/

Atlantic Edge Dive Center
- A PADI 5-Star instructor development center providing scuba sales, services and training. Includes instructor profiles, store hours, and map to location in Gaithersburg.
- http://www.atlanticedge.com/

Sea Dive and Cycle
- Find information on certification classes, dive travel opportunities, hours of operation, and contact details. Based in Solomons.
- http://www.seadiveandcycle.com

Columbia Scuba
- Store hours, contact information and details on various levels of PADI certification courses.
- http://www.columbiascuba.com/

Brass Anchor Scuba Center
- Based in Frederick, with instruction, online newsletter, dive travel, and local dive information.
- http://www.brassanchor.com/

Bel Air Scuba Center
- Providing instruction, equipment sales and service, travel opportunities and air fills.
- http://www.belairscuba.com

Annapolis SCUBA Center
- Full-service PADI 5-Star dive center in Annapolis. Offers instruction, travel and an online newsletter.
- http://www.annapolisscuba.com

Divers Source
- PADI scuba training in Southern Maryland. Find class schedules, dive trips and FAQ.
- http://www.diverssource.com

Olney SCUBA Adventure Dive Club
- Club information includes membership details, photo gallery pages, dive reports, message board and classified ad section.
- http://www.scubaadventure.org

Chesapeake Scuba
- Snorkeling & scuba classes from beginner to instructor; equipment sales & service; underwater video & photo; travel.
- http://www.chesapeakescuba.com

Aqua Ventures Online
- Equipment, classes, dive travel trips, local dive trips, Maryland & Delaware wreck dives, air & nitrox fills,repairs, & rentals.
- http://www.aquaventuresonline.com