All Boating Charters
- Devotion boat tours – 5 Islands Boat Trip
- Dhermi Boat Tours
- Diamante Blu – Next 22 Self-drive
- Diamante Blu – Saver 750
- Diamond Estates and Yachting SL
- Diamond Head Cruises – Snorkel & Whale Watch
- Diamond Jig Charters LLC
- Diamond Sailing Service
- Diamond in the Rough Charters
- Dimokriteio Cruises
- Dino Yachts Cancun – Flawless 46 & Jetski
- Dirty Dolly Boat Tours | Cocoa Beach
- Discover Parguera Boat Charter
- 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
- Divine Boats
- Divota Boat Rental
- Doha, Cruise and Swim Journey
- Dolce Vita Charters
- Dolin Dive Center – Tobogan Tortuga Boat
- Dolphin & Donuts Cruise
- Dolphin & Morris Island Boat Tours
- Dolphin Connection Ingleside
- Dolphin Discoveries 2 – 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 Navigation Catamaran Cruises
- Dolphin Navigation Catamaran Cruises – L 44
- Dolphin Safari Charters – Vitamin Sea
- Dolphin Tours Cocoa Beach
- Dolphin Watching with a Marine Biologist
- Dolphin, Shark Tooth & Fishing tours
- Dolphin,Manatee Tours. DolfunTours LLC
- Dolphins Marbella
- Domestic Six Pack
- Dominican Attitude Excursions
- Domino Charter
- Domus Salerno Boat Experience
- 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 Slide Boat with Restroom up to 12
- Double Trouble Charters
- Doubledown Charters
- Douro Charter
- Douro Wave
- Downtime: Vitamin Sea Tours
- Dr. George Jones
- Dream Boat Service – Costa Smeralda Charter
- Dream Boat Service – Jet Ski Exclusive
- Dream Boat Service – Jet Ski Exclusive
- Dream Boat Service – Jet Ski Exclusive
- Dream Boat Service – Luxury Beneteau Antares
- Dream Boat Service – Luxury Yacht Sardinia
- Dream Boat Tours
- Dream Charter Company Limited
- Dream Chaser Charters
- Dream On Charters
- Dream Rental Boat – Saver
- Dream Star
- DreamCatcher Sailboat Tours
- Dreamcatcher Xperience
- Dreams Safaris
- Dressel Divers International
- Drissi Boats Agency
- Drop 'Em Down Tours
- Dubrovnik Best Offer Speedboat Private Tour
- Dubrovnik Blu – Speedboat Tours and Transfers
- Dubrovnik Boat Charter
- Dubrovnik Boat Charter
- Dubrovnik Boat Charter
- Dubrovnik Boat Charter
- Dubrovnik Boat Charter – Tecnomar Madras
- Dubrovnik Islands Tours
- Dubrovnik Premium Cruising
- Dubrovnik Sea View
- Dubrovnik Speedboat Tours
- Dubrovnik by sea
- Dubrovnik: Private Tailored Boat Tours
- Due South Fishing
- Duke Sportfishing & Ocean Adventures
- Dupichini
- Dupin S.l. FBC
- Duruma Tours and Safaris
- E - Sea Mallorca Experience – Eco Catamaran
- E - Z Boy Tours
- E L Watersports