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  2. Canadian Hydrographic Service - Wikipedia

    en.wikipedia.org/wiki/Canadian_Hydrographic_Service

    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 ...

  3. Tide table - Wikipedia

    en.wikipedia.org/wiki/Tide_table

    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 ...

  4. Skookumchuck Narrows - Wikipedia

    en.wikipedia.org/wiki/Skookumchuck_Narrows

    Skookumchuck Narrows [1] is a strait forming the entrance of Sechelt Inlet on British Columbia's Sunshine Coast in Canada. Before broadening into Sechelt Inlet, all of its tidal flow together with that of Salmon Inlet and Narrows Inlet must pass through Sechelt Rapids. At peak flows, standing waves, whitecaps, and whirlpools form at the rapids ...

  5. Nautical publications - Wikipedia

    en.wikipedia.org/wiki/Nautical_publications

    In the UK, the United Kingdom Hydrographic Office, the Witherby Publishing Group and the Nautical Institute provide numerous navigational publications, including charts, publications on how to navigate and passage planning publications. [1] [2] In the US, publications are issued by the US government and US Coast Guard.

  6. Nautical chart - Wikipedia

    en.wikipedia.org/wiki/Nautical_chart

    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 ...

  7. Rivière du Nord (Laurentides) - Wikipedia

    en.wikipedia.org/wiki/Rivière_du_Nord_(Laurentides)

    Rising from its source at Lac Brûlé, the Rivière du Nord comes from the north-northwest rather than from the north and flows east of Sainte-Agathe-des-Monts and waters several settlements, including Val-David, Sainte-Adèle, Prévost (formerly Shawbridge) and Saint-Jérôme.

  8. Northumberland Strait - Wikipedia

    en.wikipedia.org/wiki/Northumberland_Strait

    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.

  9. Chart datum - Wikipedia

    en.wikipedia.org/wiki/Chart_datum

    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).