Before revision: Common chart datums are lowest astronomical tide (LAT)Australian Bureau of Meteorology National Tide Centre Glossary URL (retrieved 30 April 2013) and mean lower low water (MLLW).
After revision: Common chart datums are lowest astronomical tide (LAT)Australian Bureau of Meteorology National Tide Centre Glossary </ref> (retrieved 30 April 2013) and mean lower low water (MLLW).