Gents, I know what the US ones are, I posted them above. I’m wondering about the UK ones, as it isn’t readily apparent what “still alive” might mean in the context of a squawk code, much less “box of tricks”. 
Gents, I know what the US ones are, I posted them above. I’m wondering about the UK ones, as it isn’t readily apparent what “still alive” might mean in the context of a squawk code, much less “box of tricks”.