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Main Menu
E6B Tab
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E6B Tab— displays Density Altitude, True Airspeed and Winds Aloft information, based upon
information you enter.
To calculate density altitude and true airspeed:
1. From the ‘E6B’ tab, use the ARROW KEYPAD to hightlight the ‘Indicated Altitude’ fi eld (at the top of
the page) and press ENTER.
2. Use the ARROW KEYPAD to enter the altitude displayed on your altimeter. Press ENTER when
fi nished.
3. Repeat steps 1 and 2 to enter the ‘Calibrated Airspeed’, ‘Baro Pressure’ and ‘Total Air Temperature’.
(For ‘Calibrated Airspeed’, use the speed displayed on your airspeed indicator. Use the current altim-
eter setting for ‘Baro Pressure’. ‘Total Air Temperature’ is the temperature of the outside air including
the heating effect caused by speed. For most aircraft, this is the temperature reading on a standard
outside air temperature gauge.)
4. The calculated fi gures for density altitude and true airspeed are displayed at the bottom of the page.
To calculate winds aloft:
1. Follow the steps above to determine true airspeed. Or, use the ARROW KEYPAD and ENTER to
manually enter a true airspeed fi gure in the ‘True Airspeed’ fi eld.
2. Use the ARROW KEYPAD to highlight the ‘Heading’ fi eld and press ENTER.
3. Use the ARROW KEYPAD to enter the aircraft heading displayed on your directional gyro or com-
pass. Press ENTER when fi nished.
4. The calculated fi gures for head/tail wind, wind direction and speed are displayed at the center of the
page.
If a True North reference is currently selected (as the heading reference; see page 95) on
your GPSMAP 196, you must enter ‘Heading’ using a True North reference to accurately
determine winds.
To calculate density altitude and true airspeed, enter Indicated
Altitude, Baro Pressure, Calibrated Airspeed and Total Air Temp.
To calculate winds aloft, perform the above calculations to deter-
mine true airspeed or enter it manually. Then enter
aircraft heading.
190-00283-00Backup.indd 81 12/8/2002, 8:09:37 PM
