Diving at the Outer Barrier Reef From Cairns HotelClub. Sail to the Outer Barrier Reef, go diving and see the stunning beauty of the coral. Why book this tour: The cruise is conducted on a luxury reef craft and buffet lunch and afternoon tea will be provided. All equipment is included and the dives are led by expert instructors. Informative reef ecology presentation. Personal space is assured with guest numbers limited to 60, but seating provided for 120. Book Now.