Bare Island is arguably Sydneys most popular dive site, by both individuals and schools alike. Constructed during the Crimean War, the location was immortalised in the marvellously forgettable Mission Impossible 2, as the Virus Factory. The eastern side of Bare Island generally boasts superior visibility and its shallower depths make it more suitable for beginner divers. The visibility on the right (western) side of the island tends not to be as good as the left , but makes up for this with an abundance of aquatic life.
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The left side is usually diveable unless a big southerly (south easterly) swell is running. Bare Island is a good dive site due to its flexibility - if one side of the Island is too rough then the other side is usually diveable. The dives here are also great night dives.
Usually visibility is better on eastern side of the island, as it is closer to the open ocean. Navigation on this side of the island is pretty easy, as the reef runs basically north south. Following the main reef on the way out you swim in a southerly direction on the way back in a northerly direction. There are a few little overhangs, so a torch is a good idea.
In regards to the western side, you can hug the main reef, which is a rocky wall which gradually turns around the right hand side of the island. Here there are overhangs and if you follow it around far enoug, you will obtain about 18m. In winter, myriad Port Jackson sharks can be found on this dive.