Flavio <<flavio.tebaldi>>
writes:

http://ozreport.com/22.103#3

In case you have to manage two different tracks of the same
flight.

The first solution [shown in the article linked to above] is bad because if you
insert time and distance manually, the program couldn’t calculate the leading
points, because it’s based on the pilot position related to the other pilots
position during the task.

The second tip could be correct but it’s much easier to merge the two tracks
automatically when you download them from the instrument, using GPS Dump. When
GPSDump opens the flight list of an instrument, you can select more than one
track for the day and it will merge them creating a single igc or kml file to
use with FS. Doing this you’ll not lose the digital signature inside the file.

Zhenya doesn't usually have access to the flight instruments,
that's why she didn't mention GPSDump.