Paul answered Art's riddle with:
When you're navigating with paper and pencil, you really need a working
point on the pencil?

Art replied:
Well done Paul. Eactly right.


Not good enough Art, really old time, mechanical pencils prevent all those
pesky shavings from floating around and.....really good navigators use ink
(well ballpoint).
Only Russian Cosmonauts use pencils. any more.
Pilot brand "Razor Points", blue or black, work really well under the red
light.

Rick
Now give me back my eraser