In Alan Browne
wrote:

On 10-01-21 11:05 , HIPAR wrote:
'Gen. Norton Schwartz, Air Force Chief of Staff, told a conference
organized by Tuft University’s Institute for Foreign Policy Analysis
that GPS signals are particularly vulnerable in time of war since
enemies know of the reliance U.S. forces place on its highly accurate
signal'.


The US military operates mostly C/A receivers for many of its
"non-critical" operations and systems as the cost and security
requirement of P/Y receivers and operations are too high. The ability
of a sophisticated enemy to effectively jam or spoof P/Y over a
significant area is pretty low - for an unsophisticated enemy it is
close to nil.

Since the "unsophisticated" enemy is often acting as a surrogate for,
and is being supplied by, a more sophisticated one, I wouldn't be so
sanguine.

Besides, jamming isn't the only threat.

--
Bert Hyman St. Paul, MN