Convergence Conversion angle Convergency or Earth Convergence Convergency or Earth convergence is the angular difference between two meridians at a parallel of latitude Meridians converge towards the poles and diverge towards the equator At the equator, two meridians with 45 degrees of difference in longitude are parallel to each other Angular difference between the meridians is zero At the poles, the same two meridians with 45 degrees of difference in longitude are have an angle of 45 degrees Angular difference is same as their change in longitude At any other…
Category: General Navigation
Basics of Air Navigation is called General navigation. In thsi section, you can learn General Navigation required for DGCA Examinations.
Scale of Maps and Charts
Scale of Chart Measurement of Distances using Scale of Chart Scale is the relationship between distances on chart and on ground The relation can be give as a Graduated Scale Line, Statement in Words and as a Representative Fraction Graduated scale line is a visual representation of scale on a graduated line Graduated scale lines are useful for visual estimation of distances Statement in words is the scale explained as a statement A statement of ‘One inch is equal to twenty nautical miles’ means a length of 1 inch on…
Map Reading Technique
Navigation using Maps and Charts Topographical Maps Topographical Maps show natural and man-made features and are used for basic navigation Used for visual map reading during visual navigation Maps normally do not show radio navigation facilities since they are used for map reading during Visual Navigation Coverage of a maps are generally lesser than that of charts Aeronautical Charts Charts are used for Instrument or Radio Navigation Aeronautical Charts show Radio Navigation facilities and Air Routes since they are used for Instrument Navigation Coverage of a charts are normally much…