# Adding filter and icon marker for emergency aircraft, such as transponder codes 7700, 7600 and 7500

**URL:** <https://adsbx.discourse.group/t/adding-filter-and-icon-marker-for-emergency-aircraft-such-as-transponder-codes-7700-7600-and-7500/1304>\
**Category:** Flight Events\
**Created:** [March 9, 2026, 1:59pm UTC](https://adsbx.discourse.group/t/adding-filter-and-icon-marker-for-emergency-aircraft-such-as-transponder-codes-7700-7600-and-7500/1304 "2026-03-09T13:59:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![batesjoe01](https://avatars.discourse-cdn.com/v4/letter/b/df705f/32.png) [@batesjoe01](https://adsbx.discourse.group/u/batesjoe01)\
**Post date:** [March 9, 2026, 1:59pm UTC](https://adsbx.discourse.group/t/adding-filter-and-icon-marker-for-emergency-aircraft-such-as-transponder-codes-7700-7600-and-7500/1304/1 "2026-03-09T13:59:04Z")

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An interesting enhancement would be to enable filtering aircraft with emergency transponder codes, such as 7700, 7600, and 7500. Additionally, perhaps tagging the subject aircraft with a red letter “E” or perhaps flashing the aircraft icon displayed.