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OpenSeaMap is a software project collecting freely usable nautical information and geospatial data to create a worldwide nautical chart. This chart is available on the OpenSeaMap website, and can also be downloaded for use as an electronic chart for offline applications. [1] The project is part of OpenStreetMap. OpenSeaMap is part of the ...
Print/export Download as PDF; Printable version; In other projects ... Pages in category "Nautical charts" The following 12 pages are in this category, out of 12 ...
The appropriate lights may also be displayed during the day at times of restricted visibility or other necessary circumstances. [3] Vessels under 7 meters are generally not required to display day shapes even if they are required to display lights at night. [4] A square black flag displayed over the ball may be used as a distress signal. [5]
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 "on demand" with cartographic data that has been downloaded to the commercial printing company as recently as the night before printing.
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[8]: 10 [9] The most common chart size was early established as the "Double-elephant", about 39 X 25.5 inches, and this has continued to be the case. [10] Chart design gradually simplified over the years, with less detail on land, focusing on features visible to the mariner. Contours were increasingly used for hills instead of hatching.
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 ...
The information in the Notice to Mariners is formatted to simplify the correction of paper charts and navigational publications. The NOTMAR.gc.ca site is a free 24/7 service providing mariners with up-to-date safety advisories. It provides mariners with a quick and easy to use interface to access Notices to Mariners information.