Garmin GPSMAP 496 Owner's Manual (for North America) - Page 58

Total Air Temperature, Calibrated Airspeed

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Aviation Aviation Mode Pages > E6B Tab To calculate true airspeed and density altitude: 1. From the E6B tab, highlight the Indicated Altitude field (at the top of the page), and press Enter. 2. Use the ROCKER to enter the altitude shown on your altimeter. Press Enter when finished. 3. Repeat steps 1 and 2 to enter the Calibrated Airspeed, Baro Pressure, and Total Air Temperature. (For Calibrated Airspeed, use the speed shown on your airspeed indicator. Use the current altimeter 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.) The calculated figures for True Airspeed and Density Altitude are shown in the designated fields. Calculated figure Barometric pressure from the nearest METAR Calculated or user-entered figure Calculated figures E6B Tab To calculate winds aloft: 1. Follow the steps in the previous procedure to determine true airspeed. OR Use the ROCKER and Enter keys to manually enter a true airspeed figure in the True Airspeed field. 2. Use the ROCKER to highlight the Heading field, and press Enter. 3. Use the ROCKER to enter the aircraft heading shown on your directional gyro or compass. Press Enter when finished. The calculated figures for Head Wind, Wind From, and Wind Speed appears. Note: If a True North reference is currently selected as the heading reference on your GPSMAP 496, you must enter Heading using a True North reference to determine winds accurately. To restore defaults on the E6B tab: 1. Open the E6B tab on the Main Menu. 2. Press Menu to open the options menu. 3. Highlight Restore Default, and press Enter. 50 GPSMAP 496 Owner's Manual

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50
GPSMAP 496 Owner’s Manual
Aviation
Aviation Mode Pages >
E6B Tab
To calculate true airspeed and density altitude:
1. From the
E6B
tab, highlight the
Indicated Altitude
field (at the
top of the page), and press
ENTER
.
2. Use the
ROCKER
to enter the altitude shown on your altimeter.
Press
ENTER
when finished.
3. Repeat steps 1 and 2 to enter the
Calibrated Airspeed
,
Baro Pressure,
and
Total Air Temperature
. (For
Calibrated
Airspeed
, use the speed shown on your airspeed indicator.
Use the current altimeter 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.) The calculated figures for
True Airspeed
and
Density
Altitude
are shown in the designated fields.
E6B Tab
Calculated
figures
Calculated
figure
Calculated or
user-entered
figure
Barometric
pressure
from the
nearest
METAR
To calculate winds aloft:
1. Follow the steps in the previous procedure to determine true
airspeed.
OR
Use the
ROCKER
and
ENTER
keys to manually enter a true
airspeed figure in the
True Airspeed
field.
2. Use the
ROCKER
to highlight the Heading field, and press
ENTER
.
3. Use the
ROCKER
to enter the aircraft heading shown on your
directional gyro or compass. Press
ENTER
when finished.
The calculated figures for Head Wind, Wind From, and Wind
Speed appears.
NOTE:
If a True North reference is currently selected as the
heading reference on your GPSMAP 496, you must enter
Heading using a True North reference to determine winds
accurately.
To restore defaults on the E6B tab:
1. Open the
E6B
tab on the Main Menu.
2. Press
MENU
to open the options menu.
3. Highlight
Restore Default
, and press
ENTER
.