All Boating Charters
- Mayer Charter – Quicksilver 755 Sundeck
- Mayhem Sportfishing
- Mb Holding SRL
- Mclir Srl
- Mediterranea Excursion
- Medulin Excursions – MB Sandra
- Medusa Charters
- Mega Tours & Sportfishing
- Mega x tours
- Megabite Costa Rica Sport Fishing
- Megacatch – Cris Makei
- Megacatch – Don Bosco
- Megafishing Beach
- Meio dia de exploração marinha saindo
- Mekong Sunset Cruise
- Melita - High Class Motoryat
- Memories Boat Tour di Fresta
- Mendoza's Sportfishing – Yaz Itzy
- Mera Mare Boat Tours
- Mera Mare Boat Tours - Mojito
- Meridian Private Yachts – 47' Carver Yacht
- Meridian Private Yachts – 62' Azimut Yacht
- Meridian4People
- Merit Boat Tours Split
- Merluzapr
- Mermaid Discovery
- Messiah Charter Srl
- Messiah Cruise
- Messiah Cruise – Five East island Tours
- Messinia Sailing – My Green Life
- 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
- Miami Beach Boat Rental Deals – Sea Ray 31
- Miami Beach Boat Rental Deals – Sea Ray 33
- Miami Beach Catamarans, LLC
- Miami Boat Tour, Raccoon Island, Sandbar
- Miami Vice Live Boat Charters
- Michael LR Jackson Tours & Travel
- Michael LR Jackson Tours & Travel
- Michelle Charters
- Michigan Charters
- Middle Bay Fishing Charters
- Midnight Fleet – Midnight Star
- Midnight Pass/Siesta Key Sandbar Tour
- Midos Charter
- Mighty Heron Charters
- Mika Tours Portugal
- Mike Harter LLC
- Mike's Watersports
- Mikula Mali – Antares 760
- Mikula Mali – Sun Odyssey 43
- Mila Majka Cruise Boat
- Miles Escape Charters
- Miller Cruises Pensacola
- Miller Time Tours
- Milos Private Sailing Cruises
- Milos VIP Services
- Milosblu Luxury Cruises
- Milwaukee Boating Tours – Dorado
- Milwaukee Offshore Fishing – Tiara
- Mimi
- Mimi Sails
- Mimosa Jamaica Yacht Charter - 55ft Mimosa
- Mina Boat Tours
- Mini Salt Maine
- 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
- Mirissa Water Sports
- Mirse Azul
- Misraab by Merenga
- Miss B Haven
- Miss Emily Charters
- Miss Madison Charter Service LLC
- 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
- Moana Charter – First Yacht 53
- Moana Charter – Little Moana
- Mod Squad Charters
- Molamola Diving Center
- Mollys Boats
- Moloko Charter
- Mona Lisa Cruises Bermuda