Explore the great barrier reef aboard a sleek luxury catamaran on this snorkel and dive cruise from cairns spend six hours on the great barrier reef at two different snorkel and dive sites cruise in style on the comfortable catamaran before taking a glass bottom boat tour to upolu cay with your onboard marine naturalist where you can either snorkel or scuba dive see options below enjoy a delicious buffet lunch on board the catamaran before heading to upolu reef to continue snorkeling or