No jaxie, I didn't mention "known ladmarks" and I wasn't referring to
"pilotage." Its very simple: any DR plot begins with a known reference point
called a "fix." If you knew anything about DR you would understand that. I
would guess that most pilots know what their starting point is - that's a
reference point.




"JAXAshby" wrote in message
...
jeffies is not smart (without asking his wife) to use the word "pilotage". he
merely said something about known ladmarks. same same.

I didn't see anywhere, where Jeff introduced "pilotage" in a way to
change the definition.

jeffies, you definitely said *you* know where *you* are because you have
reference points in DR. listen to me. you do NOT have reference points in DR.
you ONLY have where you started (and you don't even know where that is once
you have started), your speed through the medium and which direction mag North
is. That's it.

No jaxie, I didn't mention "known ladmarks" and I wasn't referring to
"pilotage." Its very simple: any DR plot begins with a known reference
point
called a "fix." If you knew anything about DR you would understand that. I
would guess that most pilots know what their starting point is - that's a
reference point.




"JAXAshby" wrote in message
...
jeffies is not smart (without asking his wife) to use the word "pilotage".
he
merely said something about known ladmarks. same same.

I didn't see anywhere, where Jeff introduced "pilotage" in a way to
change the definition.

"JAXAshby" wrote in message
...
jeffies, you definitely said *you* know where *you* are because you have
reference points in DR.

Show us where I said that. You're fantasizing an entire discussion, jaxie.
Time for those meds.

listen to me. you do NOT have reference points in DR.
you ONLY have where you started

That's one reference point ...

(and you don't even know where that is once
you have started), your speed through the medium and which direction mag North
is.

That's another reference point.

That's it.

I think "2" is substantially difference than "0." You've just admitted that DR
has two reference points. Maybe you're catching on after all, jaxie.



No jaxie, I didn't mention "known ladmarks" and I wasn't referring to
"pilotage." Its very simple: any DR plot begins with a known reference
point
called a "fix." If you knew anything about DR you would understand that. I
would guess that most pilots know what their starting point is - that's a
reference point.




"JAXAshby" wrote in message
...
jeffies is not smart (without asking his wife) to use the word "pilotage".
he
merely said something about known ladmarks. same same.

I didn't see anywhere, where Jeff introduced "pilotage" in a way to
change the definition.

jeffies, you really, really, really need to have your wife check your posts
before you hit the send key.

jeffies, you definitely said *you* know where *you* are because you have
reference points in DR.

Show us where I said that. You're fantasizing an entire discussion, jaxie.

one post up, and the entire post below

you ONLY have where you started

That's one reference point ...

it is no longer a reference point once you have moved, for you no longer know
where it is. that is a fact of physics (which you said you have a degree in)

which direction mag North
is.

That's another reference point.

really? so, if that is true and you know North is "thata way" where on the
planet are you?

Are you proving you can't even navigate with a newsreader, jaxie?



"JAXAshby" wrote in message
...
jeffies, you definitely said *you* know where *you* are because you have
reference points in DR.

Show us where I said that. You're fantasizing an entire discussion, jaxie.

one post up, and the entire post below

you ONLY have where you started

That's one reference point ...

it is no longer a reference point once you have moved, for you no longer know
where it is. that is a fact of physics (which you said you have a degree in)

which direction mag North
is.

That's another reference point.

really? so, if that is true and you know North is "thata way" where on the
planet are you?

huh?

Are you proving you can't even navigate with a newsreader, jaxie?



"JAXAshby" wrote in message
...
jeffies, you definitely said *you* know where *you* are because you have
reference points in DR.

Show us where I said that. You're fantasizing an entire discussion,
jaxie.

one post up, and the entire post below

you ONLY have where you started

That's one reference point ...

it is no longer a reference point once you have moved, for you no longer
know
where it is. that is a fact of physics (which you said you have a degree
in)

which direction mag North
is.

That's another reference point.

really? so, if that is true and you know North is "thata way" where on the
planet are you?

List Jackass and listen good. DR in flying is just compass and speed. In
marine navigation it is compass, speed, leeway, current and tide. By
allowing for these variables accuracy is much greater.


Cheers

JAXAshby wrote:

jeffies, you definitely said *you* know where *you* are because you have
reference points in DR. listen to me. you do NOT have reference points in DR.
you ONLY have where you started (and you don't even know where that is once
you have started), your speed through the medium and which direction mag North
is. That's it.


No jaxie, I didn't mention "known ladmarks" and I wasn't referring to
"pilotage." Its very simple: any DR plot begins with a known reference
point
called a "fix." If you knew anything about DR you would understand that. I
would guess that most pilots know what their starting point is - that's a
reference point.




"JAXAshby" wrote in message
...

jeffies is not smart (without asking his wife) to use the word "pilotage".

he

merely said something about known ladmarks. same same.


I didn't see anywhere, where Jeff introduced "pilotage" in a way to
change the definition.

nav, are you saying that making more guesses *improves* the accuracy of prior
guesses?

mathematically, additional guesses degrades the accuracy of prior guesses.

what's more, aircraft also make leeway and also have current and actually have
air density differences (similar effect as the tide you mention re boats)

List Jackass and listen good. DR in flying is just compass and speed. In
marine navigation it is compass, speed, leeway, current and tide. By
allowing for these variables accuracy is much greater.


Cheers

JAXAshby wrote:

jeffies, you definitely said *you* know where *you* are because you have
reference points in DR. listen to me. you do NOT have reference points in
DR.
you ONLY have where you started (and you don't even know where that is
once
you have started), your speed through the medium and which direction mag
North
is. That's it.


No jaxie, I didn't mention "known ladmarks" and I wasn't referring to
"pilotage." Its very simple: any DR plot begins with a known reference
point
called a "fix." If you knew anything about DR you would understand that.
I
would guess that most pilots know what their starting point is - that's a
reference point.




"JAXAshby" wrote in message
...

jeffies is not smart (without asking his wife) to use the word "pilotage".

he

merely said something about known ladmarks. same same.


I didn't see anywhere, where Jeff introduced "pilotage" in a way to
change the definition.

Stick to what you know. Mathematically, incorporating additional
information (even if it has some uncertainty) can inproves the error
estimate. While aircraft may make leeway and have wind that is not
usually incorportaed in theit DR. But you knew that right?

Cheers


nav, are you saying that making more guesses *improves* the accuracy of prior
guesses?

mathematically, additional guesses degrades the accuracy of prior guesses.

what's more, aircraft also make leeway and also have current and actually have
air density differences (similar effect as the tide you mention re boats)


List Jackass and listen good. DR in flying is just compass and speed. In
marine navigation it is compass, speed, leeway, current and tide. By
allowing for these variables accuracy is much greater.


Cheers