Air Navigation Pro 5.2 User Manual - Xample

ADF
The ADF instrument in Air Navigation uses
GPS track information and does of course
not receive any radio waves. It can still be
of value for practicing ADF navigation.
The top part is the ADF indicator. The yellow
needle is pointing towards the selected
waypoint relative to the longitudinal axis of
the aircraft.
The compass card can be manually rotated
using touch and swipe up/down gesture on
the left or the right of the indicator. This
way you can set the ADF to the magnetic
heading.
Below the main indicator the name of the
active waypoint is displayed as well as the
distance from the waypoint (great circle
distance) and GPS accuracy. It is possible to
select any kind of waypoint (Airports, VOR,
NDB, etc) as an ADF target waypoint unlike
with a real ADF which requires NDB or AM
transmitters as waypoints.
You can select a new waypoint from the
database by pressing the blue disclosure
button on the bottom part of the
instrument. Please read the “Selecting waypoints from the database” to get information
about waypoint search and selection.
A “NAV” warning flag (as shown in the image above) will let you know that you
should Not trust the ADF indicator in the following cases:
‣ No waypoint is selected for the instrument;
‣ the waypoint distance is over 250 nautical miles;
‣ the GPS accuracy is bad;
‣ Groudspeed is less than 3 Kts.
Note: remember that you will ONLY find the spinball at the bottom of the instrument on iPhone/iPod
Touch devices.
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