All Boating Charters
- Maxie Sailing Curacao – Private Boat Tours
- Mayhem Sportfishing
- Mclir Srl
- Medulin Excursions – MB Sandra
- Megabite Costa Rica Sport Fishing
- Megacatch – Cris Makei
- Megacatch – Don Bosco
- Megafishing Beach
- Mera Mare Boat Tours
- Mera Mare Boat Tours
- Merluzapr
- Messiah Charter Srl
- Messiah Cruise
- Messiah Cruise – Five East island Tours
- Mexidivers
- Mi Sofi Tours – Cabo San Lucas
- Mia Vibes Charters
- Miami Boat Tour, Raccoon Island, Sandbar
- Miami Mistress – Sea Ray 52'
- 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
- Miles Escape Charters
- Miller Cruises Pensacola
- Miller Time Tours
- Milos VIP Services
- Mimosa Jamaica Yacht Charter - 55ft Mimosa
- Mina Boat Tours
- Mirabello Boats - Apollon
- Mirabello Boats - Ares
- Mirabello Boats - Athena
- Mirabello Boats - Hera
- Mirabello Boats – Archangel Michael
- Mirabello Boats – Ermis
- Mirabello Boats – Eros
- Mirabello Boats – Ifestos
- Mirabello Boats – Poseidon
- Mirabello Boats – Zeus
- Mirisola Fishing Charters
- Mirse Azul
- Misraab by Merenga
- Miss B Haven
- Miss Oregon Inlet II
- MissBhaven
- Missphitty Charters
- Mitchell Y Tapia SA De CV – Beluga's
- Mitchell Y Tapia SA De CV – Mariah
- Mizu Fishing Lanzarote
- Moana
- Mobile Bay Charters
- Mod Squad Charters
- Mollys Boats
- Moloko Charter
- Mona Lisa Cruises Bermuda
- Monarca Nautica
- Mongibello
- Montauk Charterboat CUJO
- Montenegrina Boat
- Montenegro Sailing Kotor
- Montenegro Submarine
- Montenegro Waves
- MontenegroGlobe Tours
- Monty Charter Experience
- Moorea Sunrise Fishing
- Moover Fishing Adventures
- Morris Island Tours
- Morska Vila II
- Mosselbay Ggroup Boat Trips
- Mother Ocean Charters
- Mother Ocean Charters – Adventures Your Way
- Motor Boat Rocco
- Motor Yacht Naïades
- Mow Fish Charter
- Mr Pelicano Private Boat Tour
- Mr. Bombastic Yacht Rentals
- Mr. Sea 50ft Flybridge w/Paddle & Inflatables
- Mr. Yacht Mexico – Isla Mujeres Charter
- Muddy Creek Adventures
- Mulan Charters
- Murrells Inlet Sunset Cruises
- Muscles Magoo – Hey Pal Fishing LLC
- Mutton Tours & Water Sports
- Muy Caliente Elite Charter By CoralDreams
- My Bahamas Boat Tours & Excursions
- My Dream (private Tour)
- My Islands Adventure
- My Local Sea. Zth
- Mycrew Nautic Activities – Beneteau Oceanis
- Mycrew Nautic Activities – Beneteau ST 48
- Mycrew Nautic Activities – Jeanneau DB 43
- Mycrew Nautic Activities – Ribera Yacht 980
- Mycrew Nautic Activities – Sea-Doo GTX
- Mykonian Spirit Cruises
- Mykonos Boat Trips
- Mykonos Luxury Cruise – Pershing 54