Radar geek pop quiz…
Can anyone tell me what Modes 1, 2 and 3 were used for in the old skool IFF/SSR code system?
I suppose technically they’re still used for non ADS-B equipped aircraft.
I can give clues if required.
#QuizQuestion #RadarLove
@rafadrm.bsky.social isn’t allowed to play. 😆
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