I’ve been exploring the FMC(flight management computer) on the PMDG 777 and noticed that under the route section you can insert VIA and TO points. From what I’ve learnt this is where you would insert SIDs and STARs. What are SIDs and STARs? And how are they different?
Both are predefined routes through the air which connect the airport areas (terminal areas) to the enroute airway system in a way remotely similar to local roads that everyone follows from and to highways. This ensures (in theory) an orderly fashion of after departure reaching (SID) and leaving towards the airport (STAR) the enroute airspaces for all aircraft.
SID stands for Standard Instrument Departure.
STAR stands for Standard Terminal Arrival Route.
The links touch upon everything else.
The "VIA" and "TO" on the PMDG 777 can accept Airways, SIDS and STARS and their transitions.
SID Stand for Standard Instrument Departure, which is a predefined route involving GPS waypoints or navigation aids. It prevents chaos near the airport airspace by having everyone exit the airspace the same way.
STAR Stands for Standard Terminal Arrival Route. This once again is a predefined route to enter the airspace Ina orderly fashion to land on a runway.