After completing the FMC CDU preflight actions, you look at the POS INIT page again. The SET IRS POS line is missing. What is required?
A.A.Nothing. This is a normal indication once both IRS's have entered the NAV mode.
B.B.Re-enter PPOS LAT/LONG into the FMC.
C.C.The alignment was not performed. Cycle the IRS's to OFF and start a new alignment, then re-enter PPOS LAT/LONG
D.D.Return to ALIGN, then NAV, and enter the PPOS LAT/LONG into the Left or Right IRS unit.
正确答案是A