Wanted to spend overnights on the Great Barrier Reef. This cruise visited both islands and reefs, with overnights off both. The crew were profession, friendly and cheerful. The meals were five star. Drinks were high quality. The cruise went from Cairns, south to Hinchinbrook and the Palm Island Group; then north to Cooktown, Lizard Island the Ribbon Reef. So quite a distance, with steaming mostly at night, but still some steaming during the day. Snorkelling was excellent. Of the seven days, five were calm but the last two were rough. So be prepared for rough conditions, and seasickness. There is a platform which descends from the back of the boat for launching of the glass bottom boat, and for snorkelling. This is a very civilised way of entering the water. Look outs are on duty at all times during diving and snorkelling sessions. Safety seemed paramount. The baot is not fast; maybe 9knots.