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The CHS is administratively part of Fisheries and Oceans Canada's Oceans and Ecosystems Science Sector. According to mandated obligations of the Oceans Act and the Canada Shipping Act, the CHS is led by the Hydrographer General of Canada who is responsible for gathering, managing, transforming and disseminating bathymetric, hydrographic and nautical data and information into paper and ...
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 ...
Depths which have been measured are indicated by the numbers shown on the chart. Depths on charts published in most parts of the world use metres. Older charts, as well as those published by the United States government, may use feet or fathoms. Depth contour lines show the shape of underwater relief. Coloured areas of the sea emphasise shallow ...
The Northumberland Strait varies in depth between 17 and 65 metres, with the deepest waters at either end. The tidal patterns are complex; the eastern end has the usual two tides per day, with a tidal range of 1.2 to 1.8 metres, while the western end effectively has only one tide per day.
Sheet Harbour became a prosperous hub for the lumber industry. A sawmill was built around 1863 at the tide head of East River, though its operating company dissolved a few years later due to financial issues. The first sulphide pulp mill in Canada was built in 1885 at East River. [6] The mill closed in 1891 due to the cost of importing sulphide.
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).
If you’re stuck on today’s Wordle answer, we’re here to help—but beware of spoilers for Wordle 1262 ahead. Let's start with a few hints.
The Admiralty referred to the tidal bore in a hydrographic chart published in 1861, observing that "[after] its passage the rise of the tide is very rapid until high water is attained", and that "[during the lowest tides] the Bore still appears but its broken front usually is only a few inches high." [59]