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Tide tables, sometimes called tide charts, are used for tidal prediction and show the daily times and levels of high and low tides, usually for a particular location. [1] Tide heights at intermediate times (between high and low water) can be approximated by using the rule of twelfths or more accurately calculated by using a published tidal ...
A chart datum is the water level surface serving as origin of depths displayed on a nautical chart and for reporting and predicting tide heights. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum. [1] Common chart datums are lowest astronomical tide (LAT) [1] and mean lower low water (MLLW).
Pittwater is a semi-mature tide dominated drowned valley estuary, [2] located about 40 kilometres (25 mi) north of the Sydney central business district, New South Wales, Australia; being one of the bodies of water that separate greater Metropolitan Sydney from the Central Coast.
North of the dam, the river forms the western edge of Sydney, flowing past the town of Camden and the city of Penrith, south of which flowing through the Nepean Gorge. Near Wallacia it is joined by the dammed Warragamba River ; and north of Penrith, near Yarramundi , at its confluence with the Grose River , the Nepean becomes the Hawkesbury River.
Nautical charts are essential tools for marine navigation; many countries require vessels, especially commercial ships, to carry them. Nautical charting may take the form of charts printed on paper (raster navigational charts) or computerized electronic navigational charts. Recent technologies have made available paper charts which are printed ...
The Murray forms part of the 3,750 km (2,330 mi) long combined Murray–Darling river system that drains most of the inland of Victoria, New South Wales and the southern part of Queensland. The Murray carries only a small fraction of the water of comparably sized rivers in other parts of the world, and with great annual variability of its flow.
Looking north-east across the Hawkesbury River, with Dangar Island to the right of the image. Looking south-east across the Hawkesbury River, from near Brooklyn. The headwaters of the Hawkesbury River, the Avon River, the Cataract River, and the Cordeaux River, rise only a few kilometres (miles) from the sea, about 80 kilometres (50 mi) south of Sydney.
The river rises on the northern slopes of the Liverpool Range, at the junction of the Great Dividing Range and Mount Royal Range, south of the village of Nundle, and flows generally north, west and north west and emerges into the Liverpool Plains near Tamworth.