I had my son-in-law run my Tcl GlassPanel simulation on his Linux
computer at Purdue where his is a professor in the mathematics
department.  Good news!  He said it appeared to run fine on his computer

... at least until the airplane flew off the map...

I've created compass images for only headings at 5 degree increments
from  0 < x < 135 degrees, it's time consuming work.

R