A boat will take you to and from the submarine ,during the boat ride there is a safety briefing. After the short boat ride to the submarine, the hatches are secured and the tour begins. Only natural daylight is initially used but as it gets dark the lights on the submarine are switched on ,revealing a different perspective of the coral reef. This lends to the ambience and gives a romantic mood to the tour. You are able to experience the best of both worlds day and night. There is less activity on the reef as predators and reef fish are fewer in number than during the day. On surfacing you are transferred back aboard the boat for the return to the dock.