Contact Diveheart for more general information, also. Look for their Facebook page. Diveheart has "prepared" several resorts and boats. Including trained HSA buddies as local divemasters.
Also, Some of us are currently assembling a cloud database for divers with adaptive needs to help,ensure this does not happen when they try to travel mainstream and not require a facilitation agency such as Diveheart, Achilles Divers, Eels on Wheels, etc to travel along. W
With more specific destination info., I/we can recommend locations globally for not only the diving operations but also the Accomodations and local transportation. Our pilot non-USA located program is just being established in the next few weeks.
for,example, I am in Roatan currently checking out dive operation/resort compatibility for adaptive needs.
Operations leading in this are in Cozumel, key Largo, cayman, Bonaire, and a couple of others. Don't overlook the rest of the local factors.