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S-63 is an International Hydrographic Organization (IHO) standard for encrypting, securing and compressing electronic navigational chart (ENC) data.. The Data Protection Scheme was prepared by the IHO Data Protection Scheme Advisory Group, and was based on the protection scheme developed and operated by Primar as part of providing their protected ENC service.
An Electronic Navigational Chart (ENC) is a digital representation of a real-world geographical area for the purpose of Marine navigation.Real-world objects and areas of navigational significance, or to a lesser degree - informational significance, are portrayed through Raster facsimiles of traditional paper charts; or more commonly through vector images, which are able to scale their relative ...
The United Kingdom Hydrographic Office (UKHO) is now a part of the Ministry of Defence rather than a naval department and is located in Taunton, Somerset, near Creechbarrow hill. It is best known for producing the well-known Admiralty chart series of nautical charts that covers almost every navigable stretch of water on Earth. The UKHO also ...
United Kingdom – United Kingdom Hydrographic Office United States – Office of Coast Survey; National Ocean Service; National Geospatial-Intelligence Agency Uruguay – Oceanographic, Hydrographic and Meteorological Service of the Uruguayan Navy Vanuatu – Ministry of Lands, Geology, and Minerals
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Using this system, the navigator does not immediately update every chart in the portfolio when a new Notice to Mariners arrives, instead creating a card for every chart and noting the correction on this card. When the time comes to use the chart, he pulls the chart and chart's card, and makes the indicated corrections on the chart.
Due to the changing nature of the seabed and other charted features, chart information must be up-to-date to maintain accuracy and general safety. This is ensured by UKHO continually assessing hydrographic data for vital safety information, with urgent updates issued via weekly Notices to Mariners (NMs)
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