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

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