Pooh Bear wrote:
Johnny Bravo wrote:

On Fri, 24 Feb 2006 14:44:10 GMT, Chad Irby wrote:
WWII bomber pilots routinely flew at 30-33,000 feet, navigating by
landmarks.

Or in the worst case, compass headings and time of travel adjusted
by wind
speed. The weather in Germany isn't always good enough for seeing
the ground from 30k feet.

Or indeed in the dark ! It's barely believable today that RAF
navigators used star sightings on early raids.

Even prior to WWII, WWI Zeppelins flew to London in night raids using dead
reckoning and an extremely crude radio navigation system. The radio system
required German ground stations determine the direction the Zeppelin's
radio transmissions were coming from and had to radio back that information
to the airships who then did the triangulation. It was not only relatively
inaccurate, it clued the British in to the airship raids.