Why do we "deplane"?


Where do flight attendants come up with these words? Take "deplane," for example.
Why do we "deplane"?
We don't "de-car."
I asked some frequent travelers.…
Alexander Basek responded: Cause we enplaned first?
Connie Heveron wondered: Is it a "Fantasy Island" thing?
Jon Sullivan said: de-bed, de-bike, de-run… I think you are onto new Americanisms!
Esther Schindler pointed out: We do debark. Why not deplane?
Dan Saltzstein noted: And we drive on a parkway, but park in a driveway.
Pardon me while I collect my "personal belongings"—are there any other kind of belongings?—and head for the plane's exit.
Heard any odd travel words lately?