[time-nuts] GPS Spoofing

[J. Forster]

The failure rate does not matter a whole lot, if you or a loved one are
killed or injured.

How much comfort is it to a victim, if 1 person, or 5 million people,
survived ?

Failure rates only really matter to actuaries and insurance companies.

-John

=====================



> 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
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