Can Navio 2 seamlessly switch between power sources?

Hello all,
The navio docs say navio can be powered via 3 sources.
My question is can navio switch between these sources seamlessly? I am building a quad and I want the navio and onboard electronics (RC reciever, GPS and telemetry radio) to be powered by a discrete power source via maybe the servo rail as backup for the 4s LiPo battery.
Also i want to know where navio would draw power from (the 4s LiPo or the servo rail) while in flight.

@Kharroe Hi! Yes, Navio does switch between power sources seamlessly.
If you connect a Power Module to a Power port and 5V BEC to a servo-rail then Navio will be powered by the Power Module first.