[USPS Ensign]
[BPS Burgee] Birmingham Power Squadron [BPS Burgee]
0515 on Thursday, August 28th, 2008

How to Use a Chart

Charts provide information essential to your safety afloat. Even with GPS and electronic navigation, the chart is needed to tell you what is around you and between you and your intended destination. A system of symbols is used by cartographers to tell you what lies below the surface of the water and the depths of water. There is key information about visible landmarks and navigation aids to help you navigate your course. The chart also is your link with the GPS via its grid scale, compass rose, and distance scales. A brief introduction to latitude and longitude provides insight to the operation of GPS receivers.