Celestial Navigation Net - ZetaTalk

Plotting Sheet
up and down from the 90° and 270° points to find 36°, 144°, 216° and 324° respectively. Mark these points. Draw two vertical longitude lines through these two pairs.
You now have a rectangular-projection map of your local area. Feel free to draw in some sea monsters and mermaids if it makes it look more like a map to you.
See this picture to see a plotting sheet with working lines added for latitude 54°.
Scale
This scale deserves some special attention. The plotting sheet is a map, and all maps need some scales. The marks on
the central vertical line represent nautical miles (as well as minutes of latitude.) Measurements anywhere on the map
may be made by using dividers to transfer distances to this scale.
This scale in the corner is used to measure minutes of longitude. To use, find your working latitude in the scale on
the right edge and draw a horizontal line through the scale. Now, minutes of longitude may be measured along this
horizontal line.
http://www.efalk.org/Navigation/plot1.html (3 of 3) [9/6/2004 1:14:30 PM]