From Air Navigation User Manuals
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The top part is the analog ground speed indicator. On the bottom part you will find the digital speed value as well as the current GPS status symbol.

The speed unit can be set as knots, miles per hour or kilometers per hour in the application settings.


A Question mark will show instead of a digital altitude value when:

  • GPS accuracy is bad;

Note: remember that you will ONLY find the spinball at the bottom of the instrument on iPhone/iPod Touch devices.

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