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View Full Version : B737 NG - VNAV vs LNAV Arming criteria on ground


overhead
16th Mar 2018, 09:29
Hello


One of the VNAV arming criteria on ground is :

A valid flight plan has been entered

One of the LNAV arming criteria on ground is :

An active route in the FMC


Can some one please explain what is the difference between " A valid flight plan" and " An active route"

I understand active meaning route entered and executed, but what is the difference between flight plan and route?

Regards