# XIV.	Suggestion of use

* <mark style="color:red;">**We suggest you to turn-on your instrument while preparing your flight in order to be sure you get the GPS fix before starting your flight.**</mark>
* Use the strap to <mark style="color:red;">**secure**</mark> your instrument while flying.
* Electromagnetic perturbations from antennas can disturb GPS signal
* If the instrument is very hot and you fly in very cold air, fog can appear on the screen. It will dissipate within minutes.
* Only use the backlight if required. Otherwise the autonomy will decrease significantly.
* A Factory Reset from SYS PC Tool (Settings icon à Repair button) allows you to get your instrument back to default state (every recorded flight will be deleted).
* When you connect your instrument to a USB charger, the battery will start charging, even if the instrument is turned-off.