All Boating Charters
- CominoPlus Boat Charters – Experience Comino
- Commodore Yachting Croatia
- Commodore Yachting Croatia
- Comngetit Charters
- Compass Boat Charters
- Conch Queen Charters
- Conch Republic Charters
- Conquistador Fishing Chartes
- Cool Change Charters
- Cool Runnings Powerboat Adventures
- Cool Sailing Bcn
- Cop-Out Charters
- Cora Beth
- Coral Cruises
- Coral Divers Limited
- Coral Motor Yachts – Explore Adriatic
- Coral Sea Charters
- Corfu High Seas
- Corto Speedboat
- Costa Di Lusso
- Costa Rica Adventures Travels
- Costa Rica Extreme Fishing – Beach Getaway
- Costa – Catamaran Enjoy
- Cove Charters
- Cozy Waters "Chill’n by da Shores"
- Crab Island & Dolphin Cruises
- Cranks Charters
- Creole Charters – MIMI Boat
- Cretan Isla Sailing – Dia Island
- Crete Yacht Cruises
- Crete Yacht Cruises
- Crete Yacht Cruises
- Crikvenica / Island Krk Boat Tours
- Crissi Boat – Lake Como
- Cristal Cranchi 39
- Cristal Sea – Dipol
- Cristal Sea – Jeanneau 9
- Cronulla Reef Charters
- Cross Island Cruises
- Cruise Destin Bay
- Cruise Gratitude
- Cruise Piva Lake
- Cruise, Chill & Soak Up Paradise!
- CruiseFishDive
- Cruises4all Kalymnos
- Cruising Belgrade
- Cruising by Pacific Boat Rentals
- Crunch Time Sport Fishing
- Cruz Control Charters
- 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
- CycladesAzulSailing
- D.C. Outdoor Adventures
- D.I. Reef Monster Sightseeing Charters
- DC Marine Charters and Tours
- DEEP 07 – Fishing & Boat Charters
- DEEP 07 – Fishing & Boat Charters
- DENİZ CAN
- DIAMANTEDOURO
- DIAMANTEDOURO
- DIN Boat Marbella
- DIRTY DOLLY - Dolphin & Port Tours
- DSJ Fishing Charters
- DSquared Enterprises
- DUBROVNIK SAIL AWAY
- Da Island Link Escapes
- DaFishHunterCharters
- Dailey Charters
- Daily Boat And Fishing Charters
- Daily Rhodes Cruises
- Daisy – Glass Bottom Boat
- Damiano – Captain of Blue Escape
- Dan Nealy's Fishing Buddies
- Dancin Doc
- Dancing Queen Boat Charter
- Danger Charters
- David
- Davor Zambelli
- Day on the Bay Charters
- Day on the water
- Daytripper Marine Services
- De La Paz Boat Traveler
- Deboto Boats – Quicksilver 675
- Deboto Boats – Quicksilver 755 / Atlantic 750
- Deep Blue Charters
- Deep Color Excursions
- Deep Mystique Charters
- Deep Republic
- Deep Sea Fishing
- Deep Sea Scuba
- Deep Sea Scuba and Snorkeling
- Deep blue PG
- DejaVu – Sundancer 46'
- Delphi Watersports – Private Boat Ride
- Delta Outfitters