Air Navigation Pro 5.2 User Manual - Xample

Compass
The “compass” instrument displays the
current GPS course (not the magnetic
heading) on a virtual animated compass
card. The course can be displayed either
as true course or magnetic course
depending on the settings.
The outer ring is user adjustable by
touching and sliding your finger up or down
on the left or right of the compass indicator.
Air Navigation’s "compass" only shows
the GPS course. Due to the large error
of the iPhone 3GS/4′s integrated compass in
the cockpit environment we decided to
stick with GPS data for all course
information.
The bottom part contains the compass
information, current ground speed and GPS
accuracy as digital values. Units are
adjustable in the settings. If the course
information is magnetic the digital
course label will be
“MC” (Magnetic Course)
otherwise it will be
“TC” (True Course).
A “NAV” warning flag will let you know that you should Not trust the
Compass 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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