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

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