All Boating Charters
- Manatee, Dolphin and 10,000 Islands Tour
- Manatee, Dolphin, 10,000 Islands Sunset Tour
- Manatee, Dolphin, Bird Tours Near Orlando
- MandaLu Sportfishing
- Mandara Phuket
- Mangrove Explorers
- Mangrove Tour
- Mangrove Tour by Long Island Venture
- Mangusta 92f - Drift
- Manicsportfishing Charters
- Manly Sailing – Dk Yachts Force 24
- Manta
- Manta Ray Sailing – Bali Catamaran
- Mantis
- Manu Dreampoint Snorkeling
- Mar Brisa
- Mar Y Chela Boat
- Maragata Charters
- Marbella Boats Charter – Astondoa 40
- Marbella Boats Charter – Azimut 39
- Marbella Boats Charter – Rodman 1250 Sport
- Marco Island Boat Tours – Boat 1
- Marco Island Boat Tours – Boat 2
- Marco Island Boat Tours – Boat 3
- Marco Reel & Shore Charter
- Mare Calmo – Prestige 400 Fly
- Mare Nautica
- Maria del Puerto – Armonía
- Maria del Puerto – Maui Ocean
- Maria del Puerto – Moana
- Maria del Puerto – Sirenas
- Mariaboat
- Marieta Sport Fishing
- Marina Boat Charters
- Marina Boat Charters – Princess V5
- Marina Boat Charters – Sports RIB
- Marina del Rey 39 Passenger Party Cruiser
- Marinas
- Marine Go
- Mariny Charter Srl
- Mario Rent DOO – Hvar Yachting
- Marionrent DOO
- Maritime Commercial Charters
- Maritime Operations LLC
- Maritimo Yachts
- Mark Guillot’s Outdoor Adventures
- Marku Boat Tours
- Marlin My Darlin
- Marosca – Red Sea Snorkel & Island Adventure
- Marrajo Fishing Charter
- Martha’s Vineyard Charter Company
- Maréna Boat Tours
- María del Carmen
- Mas Picudos Charters
- Masheen Charters
- Master Bite
- Master Charters
- Mathis Ocean Adventures
- Mautiyak – 32' Boat
- Mautiyak – Trimaran Kayak
- Mawa Sailing – Nautitech 46ft
- Maxie Sailing Curacao – Private Boat Tours
- Mayara Boating
- Mayhem Sportfishing
- Mb Holding srl
- Mclir Srl
- Medulin Excursions – MB Sandra
- Mega Tours & Sportfishing
- Megabite Costa Rica Sport Fishing
- Megacatch – Cris Makei
- Megacatch – Don Bosco
- Megafishing Beach
- Mera Mare Boat Tours
- Mera Mare Boat Tours
- Meridian Private Yachts
- Merluzapr
- Messiah Charter Srl
- Messiah Cruise
- Messiah Cruise – Five East island Tours
- Messinia Trips
- Mexico Travel Adventure - Black Fin Boat
- Mexico Travel Adventure: Kalal Panga Boat
- Mexico Whale Shark – Capitan Tony
- Mexidivers
- Mi Sofi Tours – Cabo San Lucas
- Mia Vibes Charters
- Miami Beach Catamarans, LLC
- Miami Boat Tour, Raccoon Island, Sandbar
- Michael LR Jackson Tours & Travel
- Michael LR Jackson Tours & Travel
- Michelle Fishing Charters
- Michigan Charters
- Middle Bay Fishing Charters
- Midnight Fleet – Midnight Star
- Mighty Heron Charters
- Mike Harter LLC
- Mike's Watersports
- Miles Escape Charters
- Miller Cruises Pensacola
- Miller Time Tours