Those who choose to remain in Lunatia have the option of heading to Lunar Scientia Headquarters where they can volunteer at the control station and provide navigational assistance.

"For emergencies, the GIGA can be maneuvered remotely (limited to movement only, weapons and other features can’t be controlled) in case anyone is in danger or tries to fly out of the restricted air space. The control station has access to the emergency remote control in case pilots become mentally or physically incapacitated to continue flying. The staff will provide training and know-how for volunteers, teaching them about reading GPS, radars, and heat signatures.

Your character can remain in Lunatia and still keep in contact with those who are in voyage. They will be able to communicate until the signals eventually grow weak as indicated in the log.