Looking at charts: 1  Types of chart.Looking at charts: 2  Depths and heights.Giving a position: 1  Latitude and longitude.Giving a position: 2  Range and bearing.Finding your position: 1  GPS.Finding your position: 2  A fix.Finding your position: 3  A DR position.Finding your position: 4  An Estimated Position.

Looking at tides: 1  General introduction.Looking at tides: 2  Tide tables and tidal heights.Looking at tides: 3  Tidal streams. Looking at tides: 4  Using tidal heights.Sierra on passage. Pin Mill towards Brightlingsea.Course to steer: 1  The basic plot.Course to steer: 2  .

so much more.