All Boating Charters
- Cora Beth
- Coral Cruises
- Coral Motor Yachts – Explore Adriatic
- Coral Sea Charters
- Corfu High Seas
- Corto Speedboat
- Costa Di Lusso
- Costa Rica Extreme Fishing – Beach Getaway
- Costa – Catamaran Enjoy
- Cove Charters
- Crab Island & Dolphin Cruises
- Crab Island dolphin cruise
- Cranks charters
- Cretan Isla Sailing – Dia Island
- Crete Yacht Cruises
- Crete Yacht Cruises
- Crete Yacht Cruises
- Cristal Sea – Dipol
- Cristal Sea – Jeanneau 9
- Cronulla Reef Charters
- Cross Island Cruises
- Cruise Piva Lake
- CruiseFishDive
- Cruises by: Berger Ops. Fishing®
- Cruises4all Kalymnos
- Cruising Belgrade
- Cruising by Pacific Boat Rentals
- Crunch Time Sport Fishing
- Cruz'n AMI
- Cruz'n AMI – Sarasota
- Crystal Cruises L.P
- Crystal Dawn Dolphin and Sunset Cruises
- Crystal Flats Guide Service
- Custom Cat Charters
- Custom Charters
- D.C. OUTDOOR ADVENTURES
- D.I. Reef Monster Sightseeing Charters
- DC Marine Charters and Tours
- DENİZ CAN
- DIN Boat Marbella
- DIRTY DOLLY - Dolphin & Port Tours
- DOLPHINSMARBELLA
- DSquared Enterprises
- DUBROVNIK SAIL AWAY
- DaFishHunterCharters
- Dailey Charters
- Daily Boat And Fishing Charters
- Daisy glass botoom boat
- Dan Nealy's Fishing Buddies
- Dancin Doc
- Dancin' Dolphin Cruise Company – Booze Cruise
- Danger Charters
- David
- Davor Zambelli
- Day in the water
- Day on the Bay Charters
- Daytripper Marine Services
- Deboto Boats – Quicksilver 675
- Deboto Boats – Quicksilver 755 / Atlantic 750
- Deep Blue Charters
- Deep Color Excursions
- Deep Mystique Charters
- Deep Sea Fishing
- Deep Sea Scuba and Snorkeling
- Deep blue PG
- DejaVu – Sundancer 46'
- Delta Outfitters
- Destin Dream Yacht
- Destin Private Tiki Lil Kahuna to Crab Island
- Destin Private Yacht
- Detroit river tour
- Devotion boat tours – 5 Islands Boat Trip
- Diamond Jig Charters LLC
- Diamond Sailing Service
- Diamond in the Rough Charters
- Discover Plavnik On A Pirate Ship
- Discover Tamarindo – Jungle Boat Tour
- Discovery Agri Tours
- Dispatch Saltwater Tours
- Ditch Hag Sportfishing Charters
- Divergent Charters
- Divine Boats
- Dolce Vita Charters
- Dolphin & Donuts Cruise
- Dolphin Connection Ingleside
- Dolphin Discoveries 1 – Hilton Head
- Dolphin Discoveries 2 – Hilton Head
- Dolphin Discoveries 3 – Hilton Head
- Dolphin Escape Charters
- Dolphin Landings Charter Boat – Fantasea
- Dolphin Landings Charter Boats – Phoenix
- Dolphin Landings Charter Boats –Island Hopper
- Dolphin Landings Charter Sailing Yacht –Magic
- Dolphin Safari Charters – Vitamin Sea
- Dolphin Tours Cocoa Beach
- Dolphin Tours St Augustine
- Dolphin,Manatee Tours. DolfunTours LLC
- Domestic Six Pack
- Domus Salerno Boat Experience
- Dona Nina Fishing Tour