Tranquil Adventures a small boat and cruise charter operation specializing in charters for people with disabilities in Key Largo (south of Miami). The dock is completely wheelchair accessible.
There is a lift on the boat to help guests in and out of the water for swimming or snorkeling. The boat has all coast guard approved safety equipment and can comfortably accommodate 8 people max, 4 in wheelchairs.
You can go sightseeing, snorkeling, fishing in in the Atlantic… or a combination of any of those!
Check out their website, as well as this great video: