Types of charts • Have you heard of SNC’s? • Are there any other types? Coverage Why do you need a ‘folio’ of charts? Mercator charts Why are these so popular? Gnomic charts What are these used for? Scales What are the most common scales used? Chart Title block What information are you likely to find on a paper chart? Chart symbols Where can you find what any chart symbol represents? Chart - Colours • Do all charts have the same colours to represent areas on the chart? • What colours are you likely to see and what do they represent? • Water depth is usual shown by different colours, what are they? Latitude & Longitude • Which lines go vertically from North Pole to the South Pole? • Which lines go horizontally around the earth? Compass Rose Can you have more than one Compass Rose on a chart? Notice to Mariners How often do you update a chart? Electronic charts Would you think it necessary to have a paper chart if you had a chart plotter?