From its wartime origins, the term "squawk" represents the importance of clear communication in aviation.
A Twitter post by the EGTTinfo account said: "Squawk 7700/7600/7500 detected: 'GBTRK' G-BTRK [Piper PA-28 161 Warrior II] of Stapleford Flight Centre of United Kingdom at 5223ft AMSL (Squawk 7700)." ...
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