M
Mxsmanic
I have yet to see this, although I suppose it's possible.
Of course, compasses have the same problem.
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I have yet to see this, although I suppose it's possible.
Of course, compasses have the same problem.
M
Mxsmanic
How likely is it this compared to all engines quitting at the
same time?
Quite comparable, since it would usually correspond to a power failure.
It would likely take a total loss of
electrical power, which likely entails loss of usefulness of all
control surfaces.
So what's the backup for that?
M
Mxsmanic
Just out of
curiosity, what exact length of full, worldwide shutdown of GPS are
you assuming for your crackpot scenarios?
At least hours.
K
kashe
This is logically equivalent to saying that GPS serves no useful
purpose, which is manifestly untrue.
No, it is equivalent to saying it's not critical (for those
who plan properly), as opposed to merely useful.
For many applications, there are no alternatives to GPS, and thus no
plan to "deal with" an outage is possible. That's rather like saying
that an airline should have a plan for operating without jet fuel.
The greater the impact of a GPS outage in a specific domain, the more
likely that there is no workaround for that outage.
As always -- Proper planning prevents piss-poor performance.
Don't allow yourself to get into a life or business threatening
situation without fully assessing the risks.
K
kashe
Many of the wonderful purposes served by GPS are applications that were
impossible before GPS existed. Organizations that depend on these
applications are necessarily dependent on GPS; they cannot be otherwise.
Suggesting that they somehow find a way to do without something that
cannot be done without is illogical.
If ease, cheapness, or speed are of the essence of the communications
application, then the application is dependent on GPS, and there can be
no backup.
GPS navigation.
You have yet to describe a single action carried out by terrorists that
would be definitively prevented by shutting off GPS. And the burden of
proof is upon you.
There is little that can't operate without the beating of your heart.
As already pointed out, lungs can also be really necessary,
without which the heart doesn't have much to contribute.
In your case, impaired brain function (i.e. the gross
inability to accept anything which contradicts your notions, even when
presented by people vastly more knowledgeable than you) does not seem
to be a completely debilitating deficit.
I suggest consulting a philosophy book to bone up on the
distinction between necessary and sufficient causes.
K
kashe
Name one.
This is, in any case, begging the question (or circular
argument, if you prefer). It makes as much sense to communication
without a pencil is impossible because you've defined pencil and paper
as one form of communication.
K
kashe
What is "fairly high accuracy"? There are one whole lot of ships on the
bottom of the sea to prove that their navigational accuracy was not
quite good enough.
Poor navigation is only a single, and perhaps not very
significant, contributor to the number of ships on the bottom of the
sea. Severe weather and sub-optimal seamanship are much more likely
causes.
K
kashe
Apparently they must carry more than that, now.
Unlike aircraft, ships weigh 100,000 tons and will continue to coast
unstoppably for miles after being "stopped." Just turning large ships
can be a challenge.
No argument there, but I believe Alan was referring to
reducing speed well before entering an area of heavy traffic.
K
kashe
There's a limit to how much they can slow down and still get the job
done.
There's a much more severe limit on how _fast_ they can go and still
get the job done.
K
kashe
No, but with GPS you're less likely to have to do so.
Keeping the required adequate lookout and use of radar will do
far more than a GPS unit for avoiding collisions.
K
kashe
Sinking is not the risk. The risk is in ships going where they don't
belong.
Only a lunatic believes ships without GPS must go "where they
don't belong."
K
kashe
Yup. So GPS must remain available. Like electricity.
Touche! Electricity suffers many interruptions. Life goes on.
Theoretically[0], a solar flare could kill out the whole GPS
constellation along with all the other satelites.
Fortunately, the President cannot order solar flares.
With GPS, there is no insurance... if your company depends solely on
GPS to work, tough luck, the landsharks^Wlawyers will have you for
lunch.
Not if you can demonstrate that there was no alternative to GPS, and
especially if you can show that GPS was deliberately sabotaged.
K
kashe
So why don't air passengers have parachutes?
You have just outdone yourself in terms of asking silly-ass
questions.
K
kashe
A human being, or a signal from a computer.
No, dodo -- a battery or a shot from an air compressor.
K
kashe
Not to mention diesels running generators can be kept online
and transfer as rapidly as required.
Now fire up your little forklift and move the goalposts for
the fortieth time to a ridiculous new location.
and transfer as rapidly as required.
Now fire up your little forklift and move the goalposts for
the fortieth time to a ridiculous new location.
K
kashe
Components aren't good enough.
When in doubt (and especially when irrevocably refuted),
redefine the problem to suit your taste.
M
Mxsmanic
Only a lunatic believes ships without GPS must go "where they
don't belong."
Or a ship owner who has lost valuable property to piracy or theft.
M
Mxsmanic
Electricity suffers many interruptions.
Does it? Not where I live.
M
Mxsmanic
Not to mention diesels running generators can be kept online
and transfer as rapidly as required.
Without fuel?
J
Juergen Nieveler
Mxsmanic said:Or a ship owner who has lost valuable property to piracy or theft.
A ship will still report its position after being stolen by pirates?
Only if the pirates are extremly stupid...
Juergen Nieveler