Transition Altitude
Specified in AIP, Approach Plates
Rounded to next 1000ft
Aerodromes in close proximity to use highest.
Transition Level
Set by ATC
When QNH is passed
Taxi
Final Approach
Altimeter accuracies
60ft - 0-30000ft
80ft 0-50000ft
Equipped with two altimeters
One must be set to QNH before taking off
When can you change to SPS before reaching TA?
Cleared to flight level by ATC
Is QNH rounded up or down?
Down