[time-nuts] GPS Spoofing

[Chris Albertson]

What is the failure rate?   The number of failures does not matter unless
we know the total number of attempts.

Do 1% of the ships that leave a harbor to become involved in an accident or
is  it more like one in one ten million?

I'd bet there are tens of thousands of cases of GPS failures where the user
said to himself "darn, it's broken" turned the thing off and went on his
way.




On Sat, Jul 27, 2013 at 1:51 AM, Robert Atkinson <robert8rpi at yahoo.co.uk>wrote:

> It seems you can't rely on the human backup. The UK Marine accident
> Investigation Branch Has recorded numerous accidents due to poor lookout.
> See
> http://www.maib.gov.uk/cms_resources.cfm?file=/KarinSchepersReportWeb.pdf
> http://www.maib.gov.uk/cms_resources.cfm?file=/CoastalIsle.pdf
> http://www.maib.gov.uk/cms_resources.cfm?file=/Beaumont.pdf
> http://www.maib.gov.uk/cms_resources.cfm?file=/Seagate_ReportWeb.pdf
> for recent examplesThe other problem is that AIS, a significant
> anti-collision aid, relies on GPS and is susceptable to spoofing.
>
> Robert G8RPI.
>
>
> ________________________________
>  From: Chris Albertson <albertson.chris at gmail.com>
> To: jfor at quikus.com; Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Sent: Saturday, 27 July 2013, 4:18
> Subject: Re: [time-nuts] GPS Spoofing
>
>
> I boat?  The backup is a competent captain.  He'd see the compass heading
> move and quickly disengage the autopilot.   I had a boat for years  I'd
> notice a 5 degree change.  Mine was a sailboat so I'd be more sensitive to
> heading changes than a power boater but still the human is the backup.
>
> Most autopilots don't directly follow GPS, they use GPS to determine a
> heading, follow it then use GPS to detect drift and re-compute the heading.
> the heading would be held by a compass sensor in a low-cost setup or in a
> larger setup a lazer ring gyro backed up by a compass.     So a spoofed GPS
> would cause the autopilot to "think" there was a bigger crooswnd or current
> and make a bigger heading change.
>
> I bet you could hijack a drone not a manned vehicle the pilot is trained to
> monitor the automation and he'd very quickly turn it off thinking it was
> broken.
>
>
>
>
>
>
> On Fri, Jul 26, 2013 at 8:41 AM, J. Forster <jfor at quikus.com> wrote:
>
> > Prof. Humphry from Texas just reported being able to spoof GPS in the Med
> > and take over the nav system of a luxury yacht. He's done this before
> with
> > a drone in the US.
> >
> > LORAN as a backup, at least?
> >
> > -John
> >
> > ==============
> >
> >
> >
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>
>
> --
>
> Chris Albertson
> Redondo Beach, California
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-- 

Chris Albertson
Redondo Beach, California