ASA E6-B Aluminium Flight ComputerHigh quality aluminum E6 B manual flight planning computer. Vinyl case and instruction booklet included. The best slide rule style flight computer on the market, with solid aluminum construction and easy to read lettering. ASA's E6 B features a wind component grid and comprehensive crosswind correction chart, and on the other side the slide computes time, speed, distance, altitude, true airspeed, and density altitude problems as well as conversions.