Who changed the definition to include landmarks?

You're in Jaxworld now.

"otnmbrd" wrote in message
k.net...
Who changed the definition to include landmarks?

Who changed the definition to include landmarks?

jeffies.

Subject: Fog, DR and traffic lights.
From: (JAXAshby)
Date: 07/18/2004 12:06 Pacific Standard Time
Message-id:

Who changed the definition to include landmarks?

jeffies.


No he didn't, you did.
Typically, with your poor reading comprehension and lack of abilities where
navigation is concerned, you took a statement you didn't understand and tried
to turn it to your advantage.
Jeff said nothing about pilotage ... you did; Jeff said nothing about using
landmarks .... you did.
Jeff's comment was that when you start someplace, you know where you are (he
can correct me if I'm wrong) .... you could not understand this and
manufactured the rest.

Shen

That's right - starting with a Fix is pretty fundamental for DR navigation. One
could also say that the compass represents another reference, but that would be
too complex for jaxie.



"Shen44" wrote in message
...
Subject: Fog, DR and traffic lights.
From: (JAXAshby)
Date: 07/18/2004 12:06 Pacific Standard Time
Message-id:

Who changed the definition to include landmarks?

jeffies.


No he didn't, you did.
Typically, with your poor reading comprehension and lack of abilities where
navigation is concerned, you took a statement you didn't understand and tried
to turn it to your advantage.
Jeff said nothing about pilotage ... you did; Jeff said nothing about using
landmarks .... you did.
Jeff's comment was that when you start someplace, you know where you are (he
can correct me if I'm wrong) .... you could not understand this and
manufactured the rest.

Shen

One
could also say that the compass represents another reference

no, one can not. one can ONLY state which direction magnetic North is and
which direction relative to that the boat is pointed, but *no* deduction can be
made as to which direction actually is actually going. none.



but that would be
too complex for jaxie.

wasn't too complex for Einstein when he wrote his PhD thesis on the subject.
you can read that thesis, if you want, by looking up The Special Theory of
Relativity.

"JAXAshby" wrote in message
...
One
could also say that the compass represents another reference

no, one can not. one can ONLY state which direction magnetic North is and
which direction relative to that the boat is pointed, but *no* deduction can
be
made as to which direction actually is actually going. none.

I never claimed you had absolute certainty with infinite precision about the
direction of travel. You're the one claiming that's the only definition of DR.
In fact, formally speaking, the DR plot by itself makes no such presumption; it
only describes the position based on the ship's heading and speed through the
water. If you had any understanding of DR you would know this. Once again, you
just prove you don't know what DR is.





but that would be
too complex for jaxie.

wasn't too complex for Einstein when he wrote his PhD thesis on the subject.
you can read that thesis, if you want, by looking up The Special Theory of
Relativity.

Einstein's PhD thesis was not special relativity, it was "A New Determination of
Molecular Dimensions." And Special Relativity did not focus on the relative
motion issues that are significant for ship's navigation. That was fully
addressed by Galileo in his "Theory or Relativity" 300 years earlier. Einstein
only mentioned it by way of recapitulating traditional physics before showing
how Special Relativity is different. It looks like this is yet another topic
where you can show your ignorance.

jeffies, DR is just guessing, and the degree of uncertainty can not be
determined. That is physically impossible.

remember, jeffies, when you claimed to have a degree in physics from some
junior college? Well, if you had that associates degree in physics you might
have heard of the PhD thesis written a hundred some years ago by a young man by
the Al Einstein.

One
could also say that the compass represents another reference

no, one can not. one can ONLY state which direction magnetic North is and
which direction relative to that the boat is pointed, but *no* deduction
can
be
made as to which direction actually is actually going. none.

I never claimed you had absolute certainty with infinite precision about the
direction of travel. You're the one claiming that's the only definition of
DR.
In fact, formally speaking, the DR plot by itself makes no such presumption;
it
only describes the position based on the ship's heading and speed through the
water. If you had any understanding of DR you would know this. Once again,
you
just prove you don't know what DR is.





but that would be
too complex for jaxie.

wasn't too complex for Einstein when he wrote his PhD thesis on the
subject.
you can read that thesis, if you want, by looking up The Special Theory of
Relativity.

Einstein's PhD thesis was not special relativity, it was "A New Determination
of
Molecular Dimensions." And Special Relativity did not focus on the relative
motion issues that are significant for ship's navigation. That was fully
addressed by Galileo in his "Theory or Relativity" 300 years earlier.
Einstein
only mentioned it by way of recapitulating traditional physics before showing
how Special Relativity is different. It looks like this is yet another topic
where you can show your ignorance.

you
just prove you don't know what DR is.

well, what you claim is fine navigation practise has been illegal for pilots
(who easily understand why) for seventy some years.

JAXAshby wrote:
One
could also say that the compass represents another reference


no, one can not. one can ONLY state which direction magnetic North is and
which direction relative to that the boat is pointed, but *no* deduction can be
made as to which direction actually is actually going. none.

Wrong. If someone has experience with ones particular boat, one has
experienced in the past similar conditions, so that one has an educated
feel for how much set one has under many conditions, which one can apply
to ones magnetic heading to determine which direction one is actually going.

otn