Output Navtex Manager navigational data Radar Integrator Board autopilot data current course segment transmission Navigation databases Tides and tidal currents Seasonal currents Weather forecast chart overlay Potential Errors in Marine Navigation On a number of occasions chart data, particularly in canals, locks, harbours, ports and alongside wharves could not withstand the resolution of the ECDIS ‘zooming’ function. In many instances, the result has been that the ship’s image on an ECDIS display is depicted as overlapping the dock or jetty. There are many contributing factors that may suggest that the ship’s image on the ECDIS screen is portrayed where ‘it does not belong’. These are due to GPS errors; DGPS errors; ECDIS
militarily. They don’t have factories that manufacture telephone equipments or telephone receivers; they don’t have factories that manufacture the cables used in laying the telephone lines or the fibre- optic technologically-advanced cables now being utilized. They don’t have factories that build jet- fighters or bombers. They don’t have the capability to build platforms to extract Africa’s oil. They don’t have the tankers to ply to Africa’s wharves and lift the crude oil. They don’t have the capability to refine the oil and return it to Africa for consumption. They don’t have oil refineries. They don’t have the expertise needed to extract Africa’s gold and diamonds and refine them, get the best price and pay a good price to the owners. They don’t have factories to manufacture clothing for Africa’s teeming millions. They don’t have the farms to produce enough food to feed Africa’s teeming millions
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