I will be arriving in Belize City on Sunday at 7:15am on Feb 16th, 2002. Is it possible and if so how, to attend mass and snorkel at Hol Chan and Shark Ray Alley and get back to Belize City by 3:15 or 3:30pm to get back on the cruise ship? Please advise if it would be better to attend mass in Belize City and snorkel somewhere cool closer to this area.