All Boating Charters
- Devotion boat tours – 5 Islands Boat Trip
- Diamond Jig Charters LLC
- Diamond Sailing Service
- Diamond in the Rough Charters
- Dimokriteio Cruises
- Discover Plavnik On A Pirate Ship
- Discover Tamarindo – Jungle Boat Tour
- Discovery Agri Tours
- Dispatch Saltwater Tours
- Ditch Hag Sportfishing Charters
- Divergent Charters
- Divine Boats
- Doha, Cruise and Swim Journey
- Dolce Vita Charters
- Dolphin & Donuts Cruise
- 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,Manatee Tours. DolfunTours LLC
- Dolphins Marbella
- Domestic Six Pack
- 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: A Vitamin Sea Tour
- Downtown Tampa Charters
- Dr. George Jones
- Dream Catcher Company
- Dream On Charters
- Dreamcatcher Xperience
- Dressel Divers International
- Dubrovnik Best Offer Speedboat Private Tours
- Dubrovnik Sea Tours
- Dubrovnik Sea View
- Dubrovnik Speedboat Tours
- Dubrovnik by sea
- Duke Sportfishing & Ocean Adventures
- Dupichini
- Dupin S.l. FBC
- E - Sea Mallorca Experience – Eco Catamaran
- E L watersports
- ENJOY CANCUN! – SunDancer 45'
- Eagle Ray
- Earning Stripes
- East Coast Charters – 42'
- East Coast Charters – 43'
- East Coast Charters – 60'
- East Coast Charters – 86'
- East Coast Charters – Pacific 72
- East Cost Explorer – Glass Bottom Boat
- Easy Boat Tour – Kotor
- Easy Does It Charters
- Easy Fix Fun
- Easy Livin Charter
- Easy Livin Charters
- Eco Abrolhos Cruises
- Eco-Discovery Sandbar Adventures
- El Capricho 100 ft. - Mega Yacht
- El Diablo Charter
- El Peleador 1
- El Pilar
- Elaphiti Islands – Tailor-Made Boat Tours
- Elimar Tours
- Elysian Charters
- Emerald "C" Fishing Charters
- Emerald Islands Boating LLC
- Emerald Islands Boating LLC – Crab Island
- Emy Experiences Tours
- Encore Water Ways Inc.
- Encore Yacht
- Endless Summer Charters
- Endless Summer Charters
- EnjoSeayacht – Azimuth 68 Plus Bosphorus Tour
- EnjoSeayacht – Luxury Yacht in Istanbul
- Enjoy A Day On Estero Bay!
- Enjoy Tagus
- Enriques Unique Dives
- Entre Cabos
- Epi fiahing
- Epic Adventures – Key West 19'
- Epic Adventures – Ocean Master 33'
- Epic Adventures – Palm Beach 21'
- Epic Boat Trips