Full-service PADI 5-Star dive center in Annapolis. Offers instruction, travel and an online newsletter.

Snorkeling and scuba classes from beginner to instructor; equipment sales and service; underwater video and photo; travel.

Store hours, contact information and details on various levels of PADI certification courses.

Full service dive store in Chelmsford. Offers recreational and technical dive instruction from beginner through instructor. Includes course descriptions, training schedule, products, and travel information.

Full service dive store in Marshfield. Course information, quizzes, stories, and local dive conditions.

Retail dive store. Includes classes, charters, and equipment.

Full service diving training facility in Pittsfield. Basic to instructor and technical diving courses. Fills, equipment sales and service.

Trips and fun dives are emphasized. Photo gallery and information downloads are available.

Retail dive center. Includes information on air fills, equipment, dive charters and dive sites in the Straits of Mackinac.

Rochester dive center promotes instruction, trips and classes for kids.