Next message: Peter MacNeil: "GPS Jamming"
GPS jamming takes very little power. The signal is
actually very weak. As for jamming, it's less likely to
jam in the middle of the Ocean vice a harbour where ships
would be more likely to run agound then be easily
targeted.
And jamming is most likly conducted by a foregin power.
The US (as I stated in another post) still has Selective
Availability at their disposal as well as spoofing. Once
those are active, only military and certain government
recievers can accept encrypted siganls (which are still
sent) and separate carrier waves (L1 and L2) from the
satellite.
And some people may think there is no practical use for
continuing training with a sextant. Cross the Atlantic
and Pacific again without GPS or DGPS (which has a
limited range) and see how you do. You'll be looking for
that sextant.
Pete
> Bill, there is some question of exactly how easily the
> military signals (admittedly weak) can be jammed, but if
> you wanted to remove precision navigation capability from
> a radius of two or three thousand miles (say, over the
> Pacific and western Pacific Rim) it would require an awful
> lot of local jamming stations. If you wanted to take out a
> five thousand mile range (a penny in the bucket compared
> to the size of China) I suspect it would be cheaper and
> simpler to knock out the satellites.
Peter I. MacNeil
Lieutenant (N)
Fleet Navigating Officer Course
Serial 0601
NOTC VENTURE
"There can be only one!"
