All Boating Charters
- Comngetit Charters
- Compass Boat Charters
- Compass Boat Club - Axopar 37 XC
- Compass Boat Club - Berkshire 23 CX Sport
- Conch Queen Charters
- Conch Republic Charters
- Conquistador Fishing Chartes
- CooC
- Cool Change Charters
- Cool Runnings Powerboat Adventures
- Cool Sailing Bcn
- Cop-Out Charters
- Cora Beth
- Coral Cats Sailing Fiji – Wanaka
- Coral Cruises
- Coral Divers Limited
- Coral Motor Yachts – Explore Adriatic
- Coral Sea Charters
- Coral Yachting Private Charters Kalymnos
- CoralDreamsSeaAdventure – Muy Caliente Elite
- CoralDreamsSeaAdventure – Tamarindo Premier
- Corfu High Seas
- Cornelia Luxury Cruiser
- 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
- Crab Island / Dolphin Cruise
- Cranks Charters
- Creole Charters – MIMI Boat
- Cretan Isla Sailing – Dia Island
- Cretan Yachts
- Crete Yacht Cruises - Incredible Too
- Crete Yacht Cruises - Leinti Tea
- Crete Yacht Cruises - Marina S
- Crissi Boat – Lake Como
- Cristal Cranchi 39
- Cristal Sea – Dipol
- Cristal Sea – Jeanneau 9
- Croisieres Turquoise
- Cronulla Reef Charters
- Cross Island Cruises 90 Minute Dolphin Tour
- 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
- Cruz'n AMI – LUXERY 30ft
- Crystal Cruises L.P
- Crystal Dawn Dolphin and Sunset Cruises
- Crystal Flats Guide Service
- Cubal Adventure – Explore Boca Chica by Boat
- Custom Cat Charters
- Custom Charters
- Cyclades Charters
- CycladesAzulSailing
- Cycladica - Kymatia
- 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
- DSquared Enterprises
- DTS Lanka Tours
- DUBROVNIK SAIL AWAY
- Da Island Link Escapes
- DaFishHunterCharters
- Dahya Yachts
- Dailey Charters
- Daily Boat And Fishing Charters
- Daily Rhodes Cruises
- Daisy – Glass Bottom Boat
- Dalmacija Boat Tours
- Damiano – Captain of Blue Escape
- Dan Nealy's Fishing Buddies
- Dana Wharf Whale Watching – Catamaran
- Dana Wharf Whale Watching – Hatteras
- Dancin Doc
- Dancing Queen Boat Charter
- Danger Charters
- Danlers Eco Tours
- Darrel Water Taxi Services
- David
- Davor Zambelli
- Day on the Bay Charters