When staying in Cancun, to dive the reefs at Cozumel, dive shops offer a number of different options depending largely on where the dive shop is located:
Boat from Cancun to Cozumel and return.
Dive shop sends car to pick you up and take you to a boat launch at a hotel South of Cancun or Puerto Morelos.
Dive shop sends car to pick you up and take you to a boat in Playa del Carmen then depart by water out of Playa del Carmen.
Dive shop sends car and takes you to ferry docks in Playa del Carmen, you take ferry across, boat/car is waiting for you at the docks in Cozumel. If car, they pick you up and drive you to the boat launch.
Fly to Cozumel, car picks you up and takes you to boat launch. Reverse to depart.
You can also rent a car or take the bus or colectivo to Puerto Morelos or Playa del Carmen on your own and go directly to a dive shop and go from there.
CENOTES AND CAVE DIVING
If you have never dove a cave or cenote then you are missing something that you might find fascinating. It is such an experience being down in the caves and caverns you will never forget it. We are not cave-divers ourselves, but we have snorkeled into caverns a few times.
Truth is we at TravelYucatan.com are terrified of going deep into the caves. We have sat around and watched the divers come up and out of their dives and we can honestly say that every person comes out like they have experienced some magical event.
The cave and cenote diving is by large located South of Cancun along the Mayan Riviera. Many dive shops service both open water and cave/cenote diving.
Your options for getting there is to rent a car and drive to the location given to you by the dive shop. They may ask you to meet them at their shop or on the highway at the entrance to the cenote or at the cenote.
All equipment is provided and the divers taking you out should be certified.
There are two state-of-the-art Hyperbaric Chambers on Cozumel, one in Cancun and one in Playa del Carmen.