Dive Rite - "Whether your passion is diving beautiful reefs, deep wrecks, extreme caves, or diving them all, we make the gear to take you as far as you want to go. www.diverite.com

PADI - "The Way the World Learns to Dive" www.padi.com

International Association of Nitrox and Technical Divers (IANTD) - "The World'Largest Scuba Diving Training Organization of Open Water, Nitrox, Enriched Air, Overhead Environment, Cave, Wreck, Rebreather, Trimix, Gas Blenders, Technical Scuba Divers, Instructors and Instructor Trainers" www.iantd.com

Technical Diving International (TDI) - "Whether your interests lie in nitrox, rebreathers, mixed gas or any of the many other programs that TDI offers you can be assured that you will be participating in training that offers you the "cutting edge" of diving technology." www.tdisdi.com

National Assocation for Cave Diving (NACD) - "The NACD was established in 1968 for the purpose of achieving safer cave diving through training and education."  www.safecavediving.com

Riviera Maya Association of Dive and Water Sport Operators (APSA) www.diverivieramaya.com/rivierainfo.html

SSS Recompression Chamber Network, Sub-Aquatic Safety Services Global Hyperbaric Medicine www.sssnetwork.com

Len Bucko Photo School - "A One Week Trip through the digital maze of menus, downloads and editing techniques that will have you capturing and creating incredible images with your digital still or video camera." www.lenbuckophoto.com

Diablo Divers and Diablo Adventures - Adventures on Mexico's Mayan Riviera, from Cancun to Tulum. www.diablodivers.com NOW under the same roof

H2O Peak Performance - "A company where an excellent client travel experience is our highest mission. We pledge to provide the finest personal guiding service and instruction for our clients who will always enjoy a warm, friendly, safe, and exciting ambience in the Riviera Maya community." www.h2opeakperform.com

Divers Alert Network (DAN) - "A 501(c)(3) non-profit medical and research organization dedicated to the safety and health of recreational scuba divers and associated with Duke University Medical Center." www.diversalertnetwork.com