Which is the purpose of the altimeter subscale?

Question

Quiz BPL Gas - Balloon Pilot License - Aircraft General Knowledge - Which is the purpose of the altimeter subscale?

QuizVDS · Accepted Answer

To reference the altimeter reading to a predetermined level such as mean sea level, aerodrome level or pressure level 1013.25 hPa

QuizVDS · Answer

To adjust the altimeter reading for non-standard temperature

QuizVDS · Answer

To set the reference level for the altitude decoder of the transponder

QuizVDS · Answer

To correct the altimeter reading for system errors

BPL Gas: Which is the purpose of the altimeter subscale?