ALT-1 Operating Manual
Page 4
Use the rotary control to adjust the local pressure setting. Pressing the F1/up key will allow the pilot to enter a reference
altitude and the deviation band.
Adjust the reference altitude using the rotary control. This is the altitude that the pilot wants to
maintain. Press the F1 key to accept, press the F2 key to return to the main display.
Adjust the deviation band above and below your reference altitude that is still acceptable to fly in.
Any altitude outside this band will activate the alarm. Press the F1 key to accept, press the F2
button to return to the main display.
Select whether you want the altitude deviation feature enabled or not. Press the F1 key to enable
the altitude deviation feature, press the F2 key to disable the altitude deviation feature.
3.5 Relative Altitude display
Use the rotary control to adjust the local pressure setting. Pressing the F1/up key will allow the pilot to enter a reference
altitude.
Enter the reference altitude you would like to use in relative mode. Use the rotary control to adjust
the reference altitude. Press the F1/up key to accept.
3.6 Density Altitude display
Density altitude is a perceived altitude that pertains to your current altitude and temperature (and to a lesser extent on
your current moisture content of the air). Density altitude is relevant for performance calculations of your aircraft. Density
altitude affects the performance of your engine, propeller and airfoils. The most noticeable affects of density altitude are
length of take-off and landing runs and the ability of your aircraft to carry weight. There are several methods to calculate
density altitude, all result in readings that are very close to each other. We decided to implement a popular formula that is
often used by pilots to calculate density altitude at their location.
Local pressure readout (either in
millibars or in inches of mercury)
Altitude unit
Barometer, can be
turned off in the
menu system
Digital VSI readout,
can be turned off in
the menu system
Reference Altitude
