Jwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 19
Reply 1, posted (12 years 3 weeks 4 days 6 hours ago) and read 2596 times:
It isn't necessary...
When you file a flightplan it is automatically loaded into the GPS which serves as a flight computer in FS, but it is your choice to use it or not. Myself, I often use it only as a moving map display.
And you can always fly without a flightplan of course.