Navigation Question number 2
 

Dead Reckoning

While beating into the wind you plot a series of course lines.

You cover 80 miles and plot 35 course lines.

How do you find a single equivalent course and distance?
What is that called?
What tables do you use?
How do you account for Set?
How do you account for Drift?

If you wanted to use a landmark like a water tower 8 mi to the east of
your departure point as a departure how do you account for that.

Joe

Navigation Question number 2
 

Joe wrote:
Dead Reckoning

While beating into the wind you plot a series of course lines.

Why?


You cover 80 miles and plot 35 course lines.


You haven't gotten a fix in 80 miles? WTF?

How do you find a single equivalent course and distance?

Drawing a line between origin & present DR

What is that called?
What tables do you use?
How do you account for Set?

Depends- over the course of 80 miles it is very likely... a
near certainty... that the current will have changed.


How do you account for Drift?


Some DR plotters include leeway, and with a full-keel boat
that's a good idea IMHO. It should be plotted for each tack,
not overall.

If you wanted to use a landmark like a water tower 8 mi to the east of
your departure point as a departure how do you account for that.


???
Use it for what? Did you take a bearing on it? If yes, then
plot the bearing... duh. That gives an LOP, but by itself
that's not a fix. If you got bearing AND range, then that's
a fix and is plotted as such for beginning your DR track.

If my boat were sailing in an area where we had to tack
approximately every two miles, and we went 80 miles with no
fix, I'd have given the "navigator" a bootleather enema and
taken over myself long before.

Fresh Breezes- Doug King

Navigation Question number 2
 

Joe wrote:
Dead Reckoning

While beating into the wind you plot a series of course lines.



Why?

to know where you are, maybe avoid a coral reef ect....maybe.


You cover 80 miles and plot 35 course lines.



You haven't gotten a fix in 80 miles? WTF?

Why plot a course and not know where you are?


How do you find a single equivalent course and distance?


Drawing a line between origin & present DR


What is that called?
What tables do you use?
How do you account for Set?


Depends- over the course of 80 miles it is very likely... a
near certainty... that the current will have changed.

So you could never use that "Drawing a line between origin & present
DR" method again could you


How do you account for Drift?


Some DR plotters include leeway, and with a full-keel boat
that's a good idea IMHO. It should be plotted for each tack,
not overall.

DR Plotters? The DR plotter is suppose to be in your head


If you wanted to use a landmark like a water tower 8 mi to the east of
your departure point as a departure how do you account for that.


???
Use it for what? Did you take a bearing on it? If yes, then
plot the bearing... duh. That gives an LOP, but by itself
that's not a fix. If you got bearing AND range, then that's
a fix and is plotted as such for beginning your DR track.

If my boat were sailing in an area where we had to tack
approximately every two miles, and we went 80 miles with no
fix, I'd have given the "navigator" a bootleather enema and
taken over myself long before.

Yeah well that has nothing to do with the questions.
Please sit in the corner with Commode Joe.

Next!

BTW where is Nav?

Joe

Navigation Question number 2
 

And you know nothing about Transverse sailing either.

Next!

Joe

Navigation Question number 2
 

While beating into the wind you plot a series of course lines.


Why?

Joe wrote:
to know where you are, maybe avoid a coral reef ect....maybe.


And so you follow a DR course for 80 miles, not getting a
fix, in an area where there are coral reefs?

Yeah right.


Depends- over the course of 80 miles it is very likely... a
near certainty... that the current will have changed.

So you could never use that "Drawing a line between origin & present
DR" method again could you


Sure you could. It would allow perfectly for set & drift
over that time & distance... if set & drift were constant
the whole time you were sailing along with no fix & not
having plotted set & drift for each tack...


Some DR plotters include leeway, and with a full-keel boat
that's a good idea IMHO. It should be plotted for each tack,
not overall.

DR Plotters? The DR plotter is suppose to be in your head

Umm, no... it is perfectly acceptable to work a DR plot on a
chart. Or did you think I meant some electronic gizmo?

"DR Plotter" means the person who is plotting the DR.

Not you, in other words.

DSK

Navigation Question number 2
 

Joe wrote:
Dead Reckoning

While beating into the wind you plot a series of course lines.

You cover 80 miles and plot 35 course lines.

How do you find a single equivalent course and distance?
take your point of departure and your most recent fix and connect them
with a line called the course made good or CMG.
What is that called?
CMG
What tables do you use?
??The chart table.
How do you account for Set?
You don't.
How do you account for Drift?
You don't.

If you wanted to use a landmark like a water tower 8 mi to the east of
your departure point as a departure how do you account for that.

Joe

Wierd queston. Not sure I get what you want. (I am confident that if I
understood what you want I could tell you.)

Navigation Question number 2
 

I was looking for someone to describe Transverse Sailing and the proper
use of transverse tables.

I just threw in the BS 80mi 35 tacks to throw off everyone, just like
the CG exams often do.



Joe

Navigation Question number 2
 

Joe wrote:
I was looking for someone to describe Transverse Sailing and the proper
use of transverse tables.

I just threw in the BS 80mi 35 tacks to throw off everyone, just like
the CG exams often do.



Joe

I have never used the transverse tables, always used a chart.

Navigation Question number 2
 

Gary you use transverse tables with a chart. It's a table giving
relative values of various parts of plane right triangles, for use in
solving such angles.

Joe

Navigation Question number 2
 

"Joe" wrote in news:1134572621.937498.202450
@f14g2000cwb.googlegroups.com:

Gary you use transverse tables with a chart. It's a table giving
relative values of various parts of plane right triangles, for use in
solving such angles.

Joe


"Traverse"

Navigation Question number 2
 

"Joe" wrote
Gary you use transverse tables with a chart. It's a table giving
relative values of various parts of plane right triangles, for use in
solving such angles.



otnmbrd wrote:
"Traverse"

Whatever. I knew what he meant, it's just a table of
multipliers for traveling at angles... if you know how to
use sine & cosine, you don't need it. A holdover from the
days of Columbus when mathematics was considered a "black art."

Fresh Breezes- Doug King

Navigation Question number 2
 

DSK wrote in news:KOXnf.169$zt1.95
@bignews2.bellsouth.net:

"Joe" wrote
Gary you use transverse tables with a chart. It's a table giving
relative values of various parts of plane right triangles, for use in
solving such angles.



otnmbrd wrote:
"Traverse"

Whatever. I knew what he meant, it's just a table of
multipliers for traveling at angles... if you know how to
use sine & cosine, you don't need it. A holdover from the
days of Columbus when mathematics was considered a "black art."

Fresh Breezes- Doug King




G I think the only time I ever used these tables was during license
exams, and to be honest, I had to check to confirm it was "traverse" not
"transverse".
In it's day, however, it was a nice shortcut.

otn

Navigation Question number 2
 

Opps..... I looked it up.... you are correct it is traverse tables.

joe

Navigation Question number 2
 

Joe wrote:
Gary you use transverse tables with a chart. It's a table giving
relative values of various parts of plane right triangles, for use in
solving such angles.

Joe

I know what they are, I've studied them but I get the same info using
chartwork.

If I was solving for sailings that were across different chart I might
use tables.

PS; Its Traverse Tables.

Gaz

Navigation Question number 2
 

Is your boat pulled out of the water?

What do you do in the winter? It's to cold to paint right?

Joe