Fog, DR and traffic lights.
 

"JAXAshby" wrote in message
...
you still haven't told us what buoy you were looking for
then

it was a light, at night.

You keep saying that, but you still haven't told us which light. The prinmary
light, Diamond Shoals, has a nominal range of 18 miles. Are you claiming your
GPS was so far off you couldn't find that?

Frankly, I can remember virtually every major landmark I've passed in the last 5
years or so - I'll admit that I don't remember everything from 40 years ago.
But I have a log entry for every day I've sailed in the last 15 years or so.
Certainly I would remember which light was so elusive as to cause such a radical
solution!


if we didn't find that light we were going to do the
prudent thing and turn around, go back from where we came,

Where did you come from? New York?

turn east, travel
well away from Hatteras and hope we didn't hit the Gulf Stream that would take
us back north, and then resume going south.

jeffies, we were trying to go between the Gulf Stream and Hatteras, and that
was a tight squeeze that day.

Obviously it was too tight for you. You can go more than 5 miles inside of
Diamond Shoals light. In fact, you could navigate it safely just using
soundings. Its pretty clear you had no idea what was going on, and you still
haven't looked at a chart to figure it out. It sound like you were down below
soiling yourself, while the adults were goofing on you!



you, jeffies, would have done what?

I don't know - I've never been so badly lost that I couldn't find an 18 mile
light on a clear night, with a GPS.

Fog, DR and traffic lights.
 

JAXAshby wrote:
absolutely not. DR has no reference points in it, and I have never stated that
it does.

In that case, you best look up "reference point". The starting point of
a DR plot is generally at a known reference point and it can easily be
said that the ending point of your DR is also a reference point.

LOL Why is it, every time I open a Jax post now, my computer starts
playing the music from "Twilight Zone"?

otn

Fog, DR and traffic lights.
 

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

Fog, DR and traffic lights.
 

"otnmbrd" wrote in message
nk.net...


JAXAshby wrote:
absolutely not. DR has no reference points in it, and I have never
stated that
it does.

In that case, you best look up "reference point". The starting point of
a DR plot is generally at a known reference point


This is just too cruel!


I'm almost tempted to post photos of Jax in his underpants.



Regards


Donal
--

Fog, DR and traffic lights.
 

and goes to where??

jeffies, the ONLY thing you know for sure in DR is where you started, and you
don't even know where that is for sure once you are moving. ask your wife to
explain it to you.

Wrong jaxie. Every DR plot starts with a reference point. You're just
showing
you have no idea what you're talking about.



"JAXAshby" wrote in message
...
absolutely not. DR has no reference points in it, and I have never stated
that
it does.

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

Fog, DR and traffic lights.
 

the starting point is no longer a reference point once you are moving, because
you no longer know where it is in relation to where your boat is.

this ain't hard stuff, dood. every pilot on the planet knows it.

absolutely not. DR has no reference points in it, and I have never stated
that
it does.

In that case, you best look up "reference point". The starting point of
a DR plot is generally at a known reference point and it can easily be
said that the ending point of your DR is also a reference point.

LOL Why is it, every time I open a Jax post now, my computer starts
playing the music from "Twilight Zone"?

otn

Fog, DR and traffic lights.
 

it can easily be
said that the ending point of your DR is also a reference point.

while it may be easily said, it is in no way accurate, for you do not with any
degree of certainty just where you are once you have started. It is physically
impossible to know.

Fog, DR and traffic lights.
 

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.

Fog, DR and traffic lights.
 

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.

Fog, DR and traffic lights.
 

No, and that sort of thinking has been illegal for pilots to put into practise
for seventy some years. there is a reason why it is illegal. a good,
scientific reason.

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