2015 Australian Lighthouses-Aids to Navigation $1 Uncirculated Coin. On July 1st 1915, the Commonwealth of Australia officially accepted responsibility from the state governments for all landfall and coastal lights around Australia. Today, the Australian Maritime Safety Authority is responsible for maintaining aids to navigation at some 388 sites around 37,600 kilometres of Australia's coastline. This commemorative coin celebrates a century of national management of lighthouses in Australia. Mintage 30,000. Please contact Adelaide Exchange Jewellers to find out more on this item.