It's not my first time there. I dove Dos Ojos, Nohoch, Tajma Ha, Carwash, Mayan Blue, Tortuga, Chikin Ha, Minotauro, Pedrin Fenomeno, Jailhouse. I also dove Aerolito in Cozumel many times. I have a general idea about the entrance, navigation, and other aspects, but I never planned out the full...