All Boating 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
- DIN Boat Marbella
- DIRTY DOLLY - Dolphin & Port Tours
- DREAM CHARTER COMPANY LIMITED
- DSquared Enterprises
- DUBROVNIK SAIL AWAY
- DaFishHunterCharters
- Dailey Charters
- Daily Boat And Fishing Charters
- Daily Rhodes Cruises
- Daisy – Glass Bottom Boat
- Damiano – Captain of BluEscape
- Dan Nealy's Fishing Buddies
- Dancin Doc
- Dancing Queen Boat Charter
- 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
- Deluxe Private Boats
- 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 Head Cruises - Snorkel & Whale Watch
- Diamond Jig Charters LLC
- Diamond Sailing Service
- Diamond in the Rough Charters
- Dimokriteio Cruises
- Discover Plavnik On A Pirate Ship
- Discover St.Lucia Tours
- Discover Tamarindo – Jungle Boat Tour
- Discovery Agri Tours
- Disney the VIP Yacht
- Dispatch Saltwater Tours
- Ditch Hag Sportfishing Charters
- Divergent Charters
- Diverso Cruiser VIP
- Divine Boats
- Doha, Cruise and Swim Journey
- Dolce Vita Charters
- Dolphin & Donuts Cruise
- Dolphin & Morris Island Boat Tours
- 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 Watching with a Marine Biologist
- Dolphin,Manatee Tours. DolfunTours LLC
- Dolphins Marbella
- Domestic Six Pack
- Dominican Attitude Excursions
- Domus Salerno Boat Experience
- Dona Nina Fishing Tour
- Dorothy Charters
- Dorothy Marie Tours
- Dos Reyes Roatán Charter Fishing & Snorkeling
- Double "DD" Adventures
- Double Ace Charters
- Double Decker Tritoon with Waterslide
- Double Hooker Charters
- Double Trouble Charters
- Douro Charter
- Downtime: Vitamin Sea Tours
- Downtown Tampa Charters
- Dr. George Jones