The best slide-rule-style flight computer on the market, now enhanced with color
for even easier readability. On the circular side, black is used for
the rate arrow and units to be calculated; Red is used for weight and
volume; Blue is used for distance, time and temperature scales. On the
wind side, colors are used to identify wind variation: blue
identifies west (or right wind correction angle) and red identifies east
(or left wind correction angle). ASA