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The Medieval and Early Modern Nautical Chart: Birth, Evolution and Use, Lisbon-based ERC-funded academic project. They develop and maintain the MEDEA-CHART Database, a sophisticated search engine and aggregator of early nautical charts data. Online version of Chart No.1 with "Symbols, Abbreviations and Terms" used in nautical charts
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 ...
Graphical and textual descriptions of navigational light sequences and colours are displayed on nautical charts and in Light Lists with the chart symbol for a lighthouse, lightvessel, buoy or sea mark with a light on it. Different lights use different colours, frequencies and light patterns, so mariners can identify which light they are seeing. [1]
Standard chart of "International Flags and Pennants" of the International Code of Signals (also known as "Pub. 102") "The purpose of the International Code of Signals is to provide ways and means of communication in situations related essentially to safety of navigation and persons, especially when language difficulties arise."
Marks are shown on nautical charts, using symbols that indicate their colour, shape and light characteristic, and are usually identified by name or number. In a wider sense the phrase "sea mark" is often understood to include all types of landmarks, structures and devices that can be used to provide warning and guiding signs to mariners.
In the past, the gnomonic projection was widely used for navigation charts, and also for polar charts. [29] Since the late 1970s, all charts at a scale of 1:50,000 or larger have used the transverse Mercator projection, [30] which is the projection used for the Ordnance Survey National Grid.
The symbols consist of a letter of the ISO basic Latin alphabet in a rhombus, printed in purple ink. [b] On any particular chart each tidal diamond will have a unique letter starting from "A" and continuing alphabetically. [1] Either somewhere on the chart (generally on land) or else on a separate sheet, will be a Tidal Diamond table. This ...
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