# Double echo

**URL:** <https://forum.safesky.app/t/double-echo/313>\
**Category:** English\
**Created:** [June 17, 2021, 10:21am UTC](https://forum.safesky.app/t/double-echo/313 "2021-06-17T10:21:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![LionelM](https://avatars.discourse-cdn.com/v4/letter/l/dfb087/32.png) [@LionelM](https://forum.safesky.app/u/LionelM)\
**Post date:** [June 17, 2021, 10:21am UTC](https://forum.safesky.app/t/double-echo/313/1 "2021-06-17T10:21:35Z")

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Hi I used SafeSky for the first time the other day and was pleased with its performance. However as I was approaching my destination I noticed traffic heading in my direction that has the apperance of possibley two aircraft flying in close formation.  
(Oh, apparently as a ‘new user’ I can’t upload an image).  
As there was only one aircraft, I was interested to know if was transmitting more than one signal, which then looks as two close targets.

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**Author:** ![dIrlandais](https://avatars.discourse-cdn.com/v4/letter/d/ce73a5/32.png) [@dIrlandais](https://forum.safesky.app/u/dIrlandais)\
**Post date:** [June 17, 2021, 6:01pm UTC](https://forum.safesky.app/t/double-echo/313/2 "2021-06-17T18:01:38Z")

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A likely reason for the double echo is that the aircraft was transmitting on ADSB and SafeSky. This can be avoided by putting the aircraft’s hexadecimal code in the SafeSky information.