Instrumentationmedium#459
IRS alignment on the ground typically takes:
A
A few seconds
B
1 hour
C
5-15 minutes, depending on latitude
CorrectD
No alignment is needed
Explanation
IRS alignment uses Earth's rotation to establish a reference; it typically takes 5-15 minutes (longer at higher latitudes).
Ready for a timed quiz?
Test yourself with random questions from Instrumentation and all other ATPL subjects.
Start a Practice Quiz