Atmospheric flight is allowed on any of the original 10 ground planets (Corellia, Dantooine, Dathomir, Endor, Lok, Naboo, Rori, Talus, Tatooine, and Yavin 4).
Use the Launch Ship radial menu option from the ship control device in the datapad to launch the ship into atmospheric flight. You can also launch the ship into atmospheric flight using the toolbar.
Use the Land Ship radial menu option from the ship control device in the datapad to land/store the ship from atmospheric flight. You can also land/store the ship from atmospheric flight using the toolbar, or the newly added /landShip command.
Once in flight, use the newly added /inviteShip (or /target , followed by /inviteShip) command to invite passengers/gunners aboard the ship (either POB ship or non-POB ship with a currently unoccupied turret slot).
Passengers/gunners can leave the ship by using /escapePod or the escape hatch.
Atmospheric Flight pt.1: