All Boating Charters
- Chorus Cruise – Private Sunset Cruise
- Chum Crazy Charters
- Chum Em Up Charters – Sunset Beach Boat Tours
- Cielo Privé Yacht Charters
- Circle hook charters
- Classic Boats Ortigia
- Classic Ketch Sailing Experience Barcelona
- Classic Sailing Yacht – Malta And Beyond
- Classic Sport Yacht
- Classic Venetian Limousine – Vio Isabel
- Classic Water Tours Saint Tropez
- Clear Boat Bahamas
- Clear Boat Curacao
- Clear Water Adventures
- ClearWake Watersports – Avalon Pontoon
- ClearWake Watersports – Tahoe Pontoon
- Clearly Hooked
- Clearwater Beach Private Pontoon Boat Tours
- Clearwater Luxury Cruises
- Clearwater Tours Roatan
- Clicquot Yacht – Private All Inclusive
- Clint's Guide Service – Cruises
- Clio Boat Tours Miami
- Cloudbreak Adventures
- Clubman 26 – Positano Coast Tour
- Clyde Legacy
- Coast Runner Outfitters
- Coastal Castaways
- Coastal Current Charters
- Coastal Escape Boat Charters Malta
- Coastal Friends Boat Tours
- Coastal Ga Fishing
- Coastal Guide Service LLC Bay Cruising
- Coastal Life Charters & Adventures
- Coastal Runners, LLC – 25'
- Coastal Runners, LLC – 35'
- Coastline Charters
- Coastline Private Tours
- Coba Belize
- Cobalt Charters
- Cocoa Beach Charters
- Cocoa Beach Eco Tours
- Cocoa Beach Manatee And Dolphin Tours
- Cocolizo Charter
- Coleman’s Guide Service
- Columba's Tours
- Columbia River Fishing Guide
- Coming In Hot
- Comino & Gozo Boat Charter – Blue Lagoon
- Comino & Gozo Boat Charter – Blue Line Malta
- Comino & Gozo Boat Charter – Jet Ski
- Comino & Gozo Boat Charter – Malta
- Comino : Blue Lagoon, Sea-caves + Gozo
- Comino Blue Lagoon, Gozo & Caves – Lucky Lady
- Comino Blue Lagoon, Gozo & Caves–Atlantis II
- Comino Blue Lagoon, Gozo & SeaCaves Tour
- Comino Charters
- Comino Land Charters
- Comino Vibes – Private Boat Charters
- Comino, Blue Lagoon & Gozo Private Boat Trips
- CominoPlus Boat Charters – Experience Comino
- Commodore Yachting Croatia
- Commodore Yachting Croatia
- Comngetit Charters
- Compass Boat Charters
- Compass Boat Club - Axopar 37 XC
- Compass Boat Club – Berkshire 23 CX Sport
- Conam 600sport
- Conch Queen Charters
- Conch Republic Charters
- Conchal Coast
- Conquistador Fishing Chartes
- Contoy Adventures
- Conwy Leisure Yachts – Sunseeker Predator 82
- 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 Keys Adventures
- Coral Motor Yachts – Explore Adriatic
- Coral River Adventures
- Coral Sail Alghero – Controluce II
- Coral Yachting Private Charters Kalymnos
- CoralDreamsSeaAdventure – Muy Caliente Elite
- CoralDreamsSeaAdventure – Tamarindo Premier
- Corfu Boat Rides
- Corfu High Seas
- Cornelia Luxury Cruiser
- Corto Speedboat
- Cost Money Mate Tour (Surf Tours)
- Costa Catch Nosara – La Bonita 29
- Costa Di Lusso
- Costa Rica Adventures Travels
- Costa Rica Extreme Fishing – Beach Getaway
- Costa del Sol 1