Ocean Free offers you the opportunity to experience the wonders of the Great Barrier Reef as it was intended. Cruise, sail, snorkel and scuba dive aboard personalized tours with fun and professional crew. Explore Green Island in the Great Barrier Reef Marine Park with Ocean Free. Whether you snorkel, are an experienced or first time scuba diver, let us show you the incredible underwater world of the Great Barrier Reef and this stunning tropical island paradise.