Transponder Mode 3/A Codes (UK)

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Can you name the Transponder Mode 3/A Codes?

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Mode 3/A meaningSquawk
NATO Air Defence Priority (first in series)
Danger areas general
FIR lost
RN Ships
SSR unreliable
General conspicuity
MPA / FPA / METMAN conspicuity
General emergency
Non-SSR environment
Mode 3/A meaningSquawk
Royal flights - helicopters
Red Arrows transit / display
Pipeline / powerline inspection
High-energy manoeuvres
Radio failure
Autonomous ops within TRAs
Special purpose code - hi-jacking
Open Skies observation
Military low level conspicuity / climb-out

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