[SystemSafety] GPS jamming

Olwen Morgan olwen at phaedsys.com
Thu Jul 11 11:42:02 CEST 2019


AFAI recall, GPS was designed to permit accurate navigation for 
missile-carrying submarines. jamming is difficult to do in the open 
ocean. Presumably aircraft over open oceans are not going to have their 
navigation affected by GPS jamming? (Dunno, I'm not an expert.)  
Exploitation-creep has blinded us to the inherent technical weaknesses 
of GPS.

Call me old-fashioned but I navigate with a road atlas. Satnav is useful 
only in the last mile and I've only ever used it once for that purpose. 
... And on long distance routes in the UK, I can almost always pick a 
shorter route than any route-finder algorithm I've so far used.

Map-reading should, IMO, be part of the driving test.


On 11/07/2019 09:29, Peter Bishop wrote:
> Yes, it is absolutely crazy to be so dependent on such a vulnerable system.
> I guess eLORAN is regarded as an unnecessary expense,
> but I would see it necessary insurance.
> Peter Bishop
> On 10/07/2019 13:04, Martyn Thomas wrote:
>> But GPS is so easy to jam and so widely used across the economy for
>> precision position and timing that it is likely to be increasingly
>> jammed by terrorists and other hostile agents. A few watts in a
>> balloon takes out a very large area.
>> The world really needs a terrestrial backup, such as eLORAN.

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