In message , Glenfiddich
writes
On Thu, 11 Mar 2004 01:15:31 +0100, "Emmanuel Gustin"
wrote:

...
AFAIK they simply tuned their equipment to the British GEE
transmitters! The basic Gee (unlike Gee-H) was not a transponder
system, so they only needed the receiver to measure the phase
shifts, and then Gee worked for the Luftwaffe as well as the RAF.

The Allies did something similar with a German (naval) navigation
system, which turned out to be so efficient that it survived the war
a long time. Unlike Gee -- Wattson-Watt made an effort to have
Gee adopted by airlines, but the American airlines were having
none of it; it was too expensive and complicated to operate.

Are you refering to the Decca Navigator system?
I thought that was a development of GEE.

He's referring to 'Sonne', a neat system which needed only an ordinary
receiver and a stop-watch. It was a 'counting dots' system. It was later
developed as 'Consol', a neat pun.
The last transmitter was at Stavanger in Norway and went off the air in
about 1955 IIRC.
The system only gave a position line but with about 1 or 2 degrees
accuracy.

It may not have been adopted by US airlines, but was commecially used
in the UK - and by the RAF.
And their later moving map display was very simple to fly.

DN was also very popular with fishing vessels,
as it let them *accurately return to a favourite spot.

A demonstration I saw in a film allowed a fishing boat to return to
harbour and actually pass between the moles without the helmsman seeing
out of the wheelhouse.

Mike
--
M.J.Powell