I could never find anything on CTI before we left. We received a schedule when we arrived but I have thrown it away. But while we were there snorkeling was at 11 & 3 (as on the schedule). Scuba was around 9 (as on the schedule)and again after the first snorkel session. I'm not sure if the second scuba time was the normal scuba time because the scuba boat was not working so they used the snorkel/glass bottom boat for everything. Also, we only did watersports one day because of the weather so that may have affected the schedule.
Catameran was at 3:30
hope this helps a little.