When flying an aircraft across the North Atlantic without the
availability of an approved long range navigation system,it is
necessary to use a set of airways usually referred to as the "Blue
Spruce Radio Routes."  My qustion concerns the origin of the name
"Blue Spruce".  Where and when did the name come from and who named
them "Blue Spruce"?
Thanks!
Dick Siano Pilot Instructor Flight Safety International Teterboro, New Jersey

Dick --

I originally tried to answer your question, even calling AOPA.  Here's
what's in the February 2006 "AOPA Pilot" magazine (pp. 120, 130):

They were called Blue Spruce routes because "it was necessary to
follow the coast of eastern Canada almost as far northeast as
possible, an area noted for its preponderance of blue spruce trees."

Best regards,

Omnivorous-GA