``` me["nav-src"].setText(""); # TODO: Simulate RNP sources ``` https://github.com/sriemmanuel787/737-MAX/blob/73fc023292a5d31cd4dd1db5d7b871256a1fc660/Nasal/Displays/PFD.nas#L325
https://github.com/sriemmanuel787/737-MAX/blob/73fc023292a5d31cd4dd1db5d7b871256a1fc660/Nasal/Displays/PFD.nas#L325