| Adventure Sports Unlimited | PADI dive center and day boat in Santa Cruz, California |
| Anacapa Dive Center | Day boat in the Channel Islands |
| Aquarius Dive Shop | Dive shop in Montery, California |
| Atlantis Charters | Live-aboard in the Channel Islands |
| Bamboo Reef | Dive center in San Francisco and Monterey, California |
| Beach Hopper | Day boat in Monterey Bay, California |
| Blue Escape | Day boat in San Diego, California |
| Blue Water Divers | Dive center in Mountain View, CA with training, equipment rental, and repairs |
| Blue Water Hunter | Dive center in Santa Barbara, CA focusing on free diving and hunting |
| Bottom Scratchers Charters | Live-aboard in the Channel Islands |
| Captain Aquas | Dive center in Dublin and Fremont, California with training and repair |
| Catalina Divers Supply | Day boat in the Catalina Islands |
| Catalina Scuba Luv | Day boat in the Catalina Islands |
| Catalina Scuba Luv | Resort on Catilina Islands |
| Coral Reef Surf & Dive Factory | Dive center in Westminster, CA with instruction also manufactures wetsuits |
| Cypress Charters | Day boats in Monterey Bay, California |
| Dive Connections | Day boat in the Channel Islands |
| Divequest Charters | Day boat in San Diego |
| Diver Dan's Wet Pleasure | Dive center in Santa Clara, California with training, equipment rentals |
| Diving Charters | Live-aboard and day boat in the Southern Channel Island |
| Dolphin Scuba Center | Dive shop in California |
| Dolphin Swim School & Scuba Center | Dive center in Sacramento, California |
| Great Escape (The) | Live-aboard and day boat in the Southern Channel Island |
| Great
White Adventures | Offers
Great White shark diving off the Farallon Islands |
| Horizon Charters | Live-aboard in the Channel Islands |
| HydroDiver | Day boat in San Diego, California |
| Liberty | Day boat in the Channel Islands |
| Liburdi's Scuba Center | Dive center in Irvine, California |
| Lois Ann Dive Charters | Day boat in San Diego, California with Nitrox |
| Manta Ray Dive Center | Dive center in Monterey Bay, California with instruction and equipment rental |
| Monterey Bay Dive Center | Dive center in Monterey Bay, California |
| Monterey Express | Day boat in Monterey Bay, California |
| Nautilus Diving & Sports Center | Dive shop in Montery, California |
| Ocean Explorations | Day boat in Monterey Bay, California |
| Ocean Odyssey | Dive shop in Santa Cruz, California. Focusing on training the tech diver |
| One Eyed Jacks Dive Charters | Day boat in San Diego, California |
| Pacific Green Divers | Day boat in Monterey Bay, California |
| Pacific Offshore Divers | Dive center in San Jose, California |
| Peace | Live-aboard and day boat in the Southern Channel Island |
| Peninsular Dive Center | Dive center in Mountain View, California |
| Rapture (The) | Live-aboard in the Channel Islands |
| Rohnert Park Dive & Travel | Dive center in Rohnert Park, California |
| Rohnert Park Dive & Travel | Dive center in Rohnert Park, California |
| San Diego Dive Boat Page | Day boats in San Diego, California |
| San Diego Shark Diving Expeditions | Day boat in San Diego, California focusing on shark diving |
| Santa Barabara Aquatics | Dive center in Santa Barabara that offers scuba classes, gear, charters, boat trips, special events, swimming, surfing, and kayaks. |
| Scuba Plus | Dive shop in Montery, California |
| SeaClypse
Dive Adventures |
Dive shop in San Diego, specializing in Scuba
an snorkel tours. Boat dives and instruction also available.
|
| Spectre | Day boat in the Channel Islands |
| Splash Aquatics | Dive center in Santa Clara, California |
| Sun Sports Tahoe | Dive center and day boat in South Lake Tahoe, California focusing on altitude diving |
| Sundiver | Live-aboard and day boat in the Southern Channel Island |
| Truth Aquatics | Live-aboard in the Channel Islands |
| Twin Otter | Day boat in Monterey Bay, California |
| Two Harbors Dive | Dive resort on Catalina Island |
| Union Jack | Day boat in Monterey Bay, California |
| Xanadu | Day boat in Monterey Bay, California |
