Radio question
 

Bobsprit claims to have made a VHF transmission of over 40nm. Given that his
antenna height is about 50 feet, that would require, for a line of sight
transmission, that the other antenna be about 800 - eight hundred - feet
above the water.

I believe that 40 miles is too close for skip, so could his transmission
have a 'terrain following' effect in the sense that the sea might act as a
ground plane?

Would anyone care to comment on the veracity of Bobsprit's claim?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Radio question
 

As usual . . .

Bobsprit lied. His antenna simply isn't high enough to get out forty miles.

I can receive Coast Guard transmissions from Group Key West - 90 miles,
Group Miami - 80 miles. This huge range is because their antennas are about
five hundred feet high. It wouldn't surprise me either if their transmission power
is higher than 25 watts.

S.Simon

"Wally" wrote in message ...
Bobsprit claims to have made a VHF transmission of over 40nm. Given that his
antenna height is about 50 feet, that would require, for a line of sight
transmission, that the other antenna be about 800 - eight hundred - feet
above the water.

I believe that 40 miles is too close for skip, so could his transmission
have a 'terrain following' effect in the sense that the sea might act as a
ground plane?

Would anyone care to comment on the veracity of Bobsprit's claim?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Radio question
 

As I mentioned in another post, its called "ducting" and works between layers of the
atmosphere. Its not the same as "skipping" which is bouncing off the troposphere. In
open water 20 to 40 miles is common - I encountered this a few days ago with some good,
but not very special equipment. Radar will also "duct" allowing you to sometimes see
features behind an island.

BTW, I often hear Woods Hole or Portland Maine CG - 80 and 100 miles from Boston. I
doubt they have a mile high antenna.

-jeff

Wally wrote:
Bobsprit claims to have made a VHF transmission of over 40nm. Given
that his antenna height is about 50 feet, that would require, for a
line of sight transmission, that the other antenna be about 800 -
eight hundred - feet above the water.

I believe that 40 miles is too close for skip, so could his
transmission have a 'terrain following' effect in the sense that the
sea might act as a ground plane?

Would anyone care to comment on the veracity of Bobsprit's claim?

Radio question
 

That 500 foot antenna only give LOS of 27 miles. You need ducting to get that to 90
miles. I assume that the CG is broadcasting at very high power, so that it will carry in
conditions too marginal for only 25 Watts.

Simple Simon wrote:
As usual . . .

Bobsprit lied. His antenna simply isn't high enough to get out forty
miles.

I can receive Coast Guard transmissions from Group Key West - 90
miles,
Group Miami - 80 miles. This huge range is because their antennas are
about
five hundred feet high. It wouldn't surprise me either if their
transmission power
is higher than 25 watts.

S.Simon

"Wally" wrote in message
...
Bobsprit claims to have made a VHF transmission of over 40nm. Given
that his antenna height is about 50 feet, that would require, for a
line of sight transmission, that the other antenna be about 800 -
eight hundred - feet above the water.

I believe that 40 miles is too close for skip, so could his
transmission have a 'terrain following' effect in the sense that the
sea might act as a ground plane?

Would anyone care to comment on the veracity of Bobsprit's claim?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Radio question
 

Would anyone care to comment on the veracity of Bobsprit's claim?

Don't doubt it at all ..... ducting

Shen

Radio question
 

Evanescent surface wave at the Brewster angle.



"Wally" wrote in message
...
Bobsprit claims to have made a VHF transmission of over 40nm. Given that
his
antenna height is about 50 feet, that would require, for a line of sight
transmission, that the other antenna be about 800 - eight hundred - feet
above the water.

I believe that 40 miles is too close for skip, so could his transmission
have a 'terrain following' effect in the sense that the sea might act as a
ground plane?

Would anyone care to comment on the veracity of Bobsprit's claim?


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Radio question
 

On Wed, 03 Sep 2003 16:33:14 GMT, "Wally" wrote this
crap:

Bobsprit claims to have made a VHF transmission of over 40nm. Given that his
antenna height is about 50 feet, that would require, for a line of sight
transmission, that the other antenna be about 800 - eight hundred - feet
above the water.

I believe that 40 miles is too close for skip, so could his transmission
have a 'terrain following' effect in the sense that the sea might act as a
ground plane?

Would anyone care to comment on the veracity of Bobsprit's claim?

You must be joking. The sea always acts as a ground plane. But a
skip is always on AM.

(Wally's answer: "Yes you are correct. I was just testing.")




Ave Imperator Bush!
Bush Was Right! Four More Years!

Radio question
 

AM (600-1600 KHz) is a ground wave. It doesn't skip.

It travels further at night because the ionic concentrations in the Appleton
layer decrease from lack of sunlight and the solar wind.


"Horvath" wrote in message
...
On Wed, 03 Sep 2003 16:33:14 GMT, "Wally" wrote this
crap:

Bobsprit claims to have made a VHF transmission of over 40nm. Given that
his
antenna height is about 50 feet, that would require, for a line of sight
transmission, that the other antenna be about 800 - eight hundred - feet
above the water.

I believe that 40 miles is too close for skip, so could his transmission
have a 'terrain following' effect in the sense that the sea might act as
a
ground plane?

Would anyone care to comment on the veracity of Bobsprit's claim?

You must be joking. The sea always acts as a ground plane. But a
skip is always on AM.

(Wally's answer: "Yes you are correct. I was just testing.")




Ave Imperator Bush!
Bush Was Right! Four More Years!

Radio question
 

On Thu, 04 Sep 2003 02:26:05 GMT, "Flounder" wrote
this crap:

AM (600-1600 KHz) is a ground wave. It doesn't skip.

It travels further at night because the ionic concentrations in the Appleton
layer decrease from lack of sunlight and the solar wind.

Well gee, that's a skip, isn't it?




Ave Imperator Bush!
Bush Was Right! Four More Years!

Radio question
 

www.physics.gatech.edu/gcuo/UltrafastOptics/ PhysicalOptics/Class08.ppt


"The Captains Master" wrote in message
...
On Wed, 03 Sep 2003 19:43:38 GMT, "Flounder"
wrote:

Evanescent surface wave at the Brewster angle.

WTF, you wanna try that in English!......if you can.....


Oz1...of the 3 twins.
I welcome you to crackerbox palace,We've been expecting you.

Radio question
 

Check out the HAM transmission records from Hawaii to the mainland.
Impressive.




"Vito" wrote in message
...
Wally wrote:

Bobsprit claims to have made a VHF transmission of over 40nm. ...
Would anyone care to comment on the veracity of Bobsprit's claim?


When it comes to radio, I've seen too many things that can't happen
actually occur that I'd never, ever doubt a report based on technical
improbability. Eg,I was monitoring a 2-meter (147 MHz) ham repeater here
in VA awhile back when a local QSO from Argentina came booming into my
handheld. Of course they couldn't hear me but the real oddity is that
other hams monitoring the same freq just a few miles away never heard
them!

Radio question
 

No, it's less attenuation in its normal mode of propagation. It has to do
with the decompression of the magnetosphere on the side of the earth away
from the sun..

Almost all AM radio stations transmit in the vertical polarization, the
antenna beam launch angle is low, it's difficult to get skip.

Horizontal polarized antennas (spaced properly above a ground plane) have a
launch angle that is favorable for skip.

If it was skip, there would be regions of no reception between regions of
reception. AM radio is continuous reception until it just fades out.

You can get AM wavelengths to skip, but it is not as common as in other
shorter wavelengths.

Henriech Hertz


"Horvath" wrote in message
...
On Thu, 04 Sep 2003 02:26:05 GMT, "Flounder" wrote
this crap:

AM (600-1600 KHz) is a ground wave. It doesn't skip.

It travels further at night because the ionic concentrations in the
Appleton
layer decrease from lack of sunlight and the solar wind.

Well gee, that's a skip, isn't it?




Ave Imperator Bush!
Bush Was Right! Four More Years!

Radio question
 

So, can you explain tropo scatter?
krj

Flounder wrote:
No, it's less attenuation in its normal mode of propagation. It has to do
with the decompression of the magnetosphere on the side of the earth away
from the sun..

Almost all AM radio stations transmit in the vertical polarization, the
antenna beam launch angle is low, it's difficult to get skip.

Horizontal polarized antennas (spaced properly above a ground plane) have a
launch angle that is favorable for skip.

If it was skip, there would be regions of no reception between regions of
reception. AM radio is continuous reception until it just fades out.

You can get AM wavelengths to skip, but it is not as common as in other
shorter wavelengths.

Henriech Hertz


"Horvath" wrote in message
...

On Thu, 04 Sep 2003 02:26:05 GMT, "Flounder" wrote
this crap:


AM (600-1600 KHz) is a ground wave. It doesn't skip.

It travels further at night because the ionic concentrations in the

Appleton

layer decrease from lack of sunlight and the solar wind.

Well gee, that's a skip, isn't it?




Ave Imperator Bush!
Bush Was Right! Four More Years!

Radio question
 

As in tropo scatter radar? Communication? Sensing? Profiling?


"Kelton Joyner" wrote in message
...
So, can you explain tropo scatter?
krj

Flounder wrote:
No, it's less attenuation in its normal mode of propagation. It has to
do
with the decompression of the magnetosphere on the side of the earth
away
from the sun..

Almost all AM radio stations transmit in the vertical polarization, the
antenna beam launch angle is low, it's difficult to get skip.

Horizontal polarized antennas (spaced properly above a ground plane)
have a
launch angle that is favorable for skip.

If it was skip, there would be regions of no reception between regions
of
reception. AM radio is continuous reception until it just fades out.

You can get AM wavelengths to skip, but it is not as common as in other
shorter wavelengths.

Henriech Hertz


"Horvath" wrote in message
...

On Thu, 04 Sep 2003 02:26:05 GMT, "Flounder" wrote
this crap:


AM (600-1600 KHz) is a ground wave. It doesn't skip.

It travels further at night because the ionic concentrations in the

Appleton

layer decrease from lack of sunlight and the solar wind.

Well gee, that's a skip, isn't it?




Ave Imperator Bush!
Bush Was Right! Four More Years!

Radio question
 

There's a layer of air on the surface of the water that has a difference in
temperature in the air above it. The permitivitty (index of refraction) of
the two layers of air are different. The difference is in the thousandth
decimal place. Because of the difference in the permitivitty a radio wave
striking the upper layer at or below the Brewster angle experiences total
internal reflection. The wave becomes trapped between the water and the
second air layer. Part of the wave does travel in the second layer, at the
boundary. That is the evanescent wave. That is also the type of wave that
allows your prism binoculars to work. The wave also travels at two different
velocities in the two air layers.
So, looking at the transmitting antenna as an isotropic radiator at 150 MHz,
the layer height at 30 meters how many modes propagate on the sea surface?

"The Captains Master" wrote in message
...
\
Umm yeah, but I asked if YOU could explain it in English.
I didn't want a direction to the webpage you used to get the stuff you
don't understand either.


On Thu, 04 Sep 2003 13:10:34 GMT, "Flounder"
wrote:


www.physics.gatech.edu/gcuo/UltrafastOptics/ PhysicalOptics/Class08.ppt


"The Captains Master" wrote in message
.. .
On Wed, 03 Sep 2003 19:43:38 GMT, "Flounder"
wrote:

Evanescent surface wave at the Brewster angle.

WTF, you wanna try that in English!......if you can.....


Oz1...of the 3 twins.
I welcome you to crackerbox palace,We've been expecting you.






Oz1...of the 3 twins.
I welcome you to crackerbox palace,We've been expecting you.

Radio question
 

"Flounder" wrote in message
ink.net...
There's a layer of air on the surface of the water that has a difference
in
temperature in the air above it. The permitivitty (index of refraction) of
the two layers of air are different. The difference is in the thousandth
decimal place. Because of the difference in the permitivitty a radio wave
striking the upper layer at or below the Brewster angle experiences total
internal reflection. The wave becomes trapped between the water and the
second air layer. Part of the wave does travel in the second layer, at the
boundary. That is the evanescent wave. That is also the type of wave that
allows your prism binoculars to work. The wave also travels at two
different
velocities in the two air layers.
So, looking at the transmitting antenna as an isotropic radiator at 150
MHz,
the layer height at 30 meters how many modes propagate on the sea surface?


You call *that* an explanation??

BTW, these "modes" that you refer to, - are they in any way similiar to the
"modes" in fibre optic transmission systems? They sound like they might be.

If they are, I would be very interested is a *plain* English explanation!
I really should know the difference between multi- and single-mode fibre
optics.

BTW this isn't a trick question. I'm genuinely interested.



Regards


Donal
--

Radio question
 

On Thu, 04 Sep 2003 02:26:05 GMT, "Flounder" wrote
this crap:

AM (600-1600 KHz) is a ground wave. It doesn't skip.

With the proper antenna, such as a dipolar, it will.




Ave Imperator Bush!
Bush Was Right! Four More Years!

Radio question
 

Absolutely the same thing as modes in a fibre optic cable. Except cables are
cylindrical (field solutions described by Bessel functions) and the
water-air geometry is described by some form of Hankel functions.

Single mode fibres are very thin. The thick cables have very many modes, all
traveling with different phase velocities and distorting pulses over the
length of the cable. Single mode fibres propagate only one mode and the
pulse retains its shape over very long distances.

The fibre optic cables act as waveguides. If the diameter of the cable is
too small (about less than 1/2 wavelength) a wave will not propagate in the
cable. If the diameter is greater than about 1/2 wavelength up to roughly .6
wavelengths then the first mode propagates called the HE11 mode. A little
larger diameter propagates the HE11 and the TE01 modes. As you increase the
diameter the number of modes increases. There's also degenerate modes,
hybrid modes, transverse electric and magnetic modes. It gets fairly
complex. There's a formula used to calculate the number of modes in big
fibres. This is all for stepped index fibres.

Fibre cables are clad to keep dust of the cable. The dust disturbs the
evanascent modes on the outside of the cable (kills the signal) just like
dirty prisms cause binoculars to work poorly.

Feel free to ask more questions, I can use the review.



"Donal" wrote in message
...

"Flounder" wrote in message
ink.net...
There's a layer of air on the surface of the water that has a difference
in
temperature in the air above it. The permitivitty (index of refraction)
of
the two layers of air are different. The difference is in the thousandth
decimal place. Because of the difference in the permitivitty a radio
wave
striking the upper layer at or below the Brewster angle experiences
total
internal reflection. The wave becomes trapped between the water and the
second air layer. Part of the wave does travel in the second layer, at
the
boundary. That is the evanescent wave. That is also the type of wave
that
allows your prism binoculars to work. The wave also travels at two
different
velocities in the two air layers.
So, looking at the transmitting antenna as an isotropic radiator at 150
MHz,
the layer height at 30 meters how many modes propagate on the sea
surface?


You call *that* an explanation??

BTW, these "modes" that you refer to, - are they in any way similiar to
the
"modes" in fibre optic transmission systems? They sound like they might
be.

If they are, I would be very interested is a *plain* English explanation!
I really should know the difference between multi- and single-mode fibre
optics.

BTW this isn't a trick question. I'm genuinely interested.



Regards


Donal
--

Radio question
 

On Thu, 04 Sep 2003 13:20:03 GMT, "Flounder" wrote
this crap:

No, it's less attenuation in its normal mode of propagation. It has to do
with the decompression of the magnetosphere on the side of the earth away
from the sun..

Actually it's the ionosphere,

Almost all AM radio stations transmit in the vertical polarization, the
antenna beam launch angle is low, it's difficult to get skip.

Were we talking about commercial AM radio? I thought we were talking
about SSB.




Ave Imperator Bush!
Bush Was Right! Four More Years!

Radio question
 

Horvath wrote in :

On Thu, 04 Sep 2003 02:26:05 GMT, "Flounder" wrote
this crap:

AM (600-1600 KHz) is a ground wave. It doesn't skip.

With the proper antenna, such as a dipolar, it will.


So that explains why you can get radio in your head so well.


Bertie

Radio question
 

Horvath wrote in :

On Thu, 04 Sep 2003 13:20:03 GMT, "Flounder" wrote
this crap:

No, it's less attenuation in its normal mode of propagation. It has to do
with the decompression of the magnetosphere on the side of the earth away
from the sun..

Actually it's the ionosphere,

Almost all AM radio stations transmit in the vertical polarization, the
antenna beam launch angle is low, it's difficult to get skip.

Were we talking about commercial AM radio? I thought we were talking
about SSB.

You just never seem to be on the right page, do you?

Bertie

Radio question
 

I seem to recall commercial advertisement for single mode fibres that
involved a graduated refractive index rather than extremely small diameter.
One thing is certain, until the amount of work involved with polishing the
ends is reduced, it will never replace copper wire for low cost or casual
applications.

"Flounder" wrote in message
ink.net...
Absolutely the same thing as modes in a fibre optic cable. Except cables
are
cylindrical (field solutions described by Bessel functions) and the
water-air geometry is described by some form of Hankel functions.

Single mode fibres are very thin. The thick cables have very many modes,
all
traveling with different phase velocities and distorting pulses over the
length of the cable. Single mode fibres propagate only one mode and the
pulse retains its shape over very long distances.

The fibre optic cables act as waveguides. If the diameter of the cable is
too small (about less than 1/2 wavelength) a wave will not propagate in
the
cable. If the diameter is greater than about 1/2 wavelength up to roughly
..6
wavelengths then the first mode propagates called the HE11 mode. A little
larger diameter propagates the HE11 and the TE01 modes. As you increase
the
diameter the number of modes increases. There's also degenerate modes,
hybrid modes, transverse electric and magnetic modes. It gets fairly
complex. There's a formula used to calculate the number of modes in big
fibres. This is all for stepped index fibres.

Fibre cables are clad to keep dust of the cable. The dust disturbs the
evanascent modes on the outside of the cable (kills the signal) just like
dirty prisms cause binoculars to work poorly.

Feel free to ask more questions, I can use the review.



"Donal" wrote in message
...

"Flounder" wrote in message
ink.net...
There's a layer of air on the surface of the water that has a
difference
in
temperature in the air above it. The permitivitty (index of
refraction)
of
the two layers of air are different. The difference is in the
thousandth
decimal place. Because of the difference in the permitivitty a radio
wave
striking the upper layer at or below the Brewster angle experiences
total
internal reflection. The wave becomes trapped between the water and
the
second air layer. Part of the wave does travel in the second layer, at
the
boundary. That is the evanescent wave. That is also the type of wave
that
allows your prism binoculars to work. The wave also travels at two
different
velocities in the two air layers.
So, looking at the transmitting antenna as an isotropic radiator at
150
MHz,
the layer height at 30 meters how many modes propagate on the sea
surface?


You call *that* an explanation??

BTW, these "modes" that you refer to, - are they in any way similiar to
the
"modes" in fibre optic transmission systems? They sound like they might
be.

If they are, I would be very interested is a *plain* English
explanation!
I really should know the difference between multi- and single-mode fibre
optics.

BTW this isn't a trick question. I'm genuinely interested.



Regards


Donal
--

Radio question
 

Yeah Wally.... 40 nautical miles for a good VHF is possible.

CM

"Wally" wrote in message
...
| Bobsprit claims to have made a VHF transmission of over 40nm. Given that
his
| antenna height is about 50 feet, that would require, for a line of sight
| transmission, that the other antenna be about 800 - eight hundred - feet
| above the water.
|
| I believe that 40 miles is too close for skip, so could his transmission
| have a 'terrain following' effect in the sense that the sea might act as a
| ground plane?
|
| Would anyone care to comment on the veracity of Bobsprit's claim?
|
|
| --
| Wally
| www.makearatherlonglinkthattakesyounowhere.com
| Things are always clearer in the cold, post-upload light.
|
|
|

Radio question
 

Yeah Wally.... 40 nautical miles for a good VHF is possible.

And STILL I get no apology from Wally who infered that I was lying.
For shame!

RB

Radio question
 

"Bobsprit" wrote in message
...
| Yeah Wally.... 40 nautical miles for a good VHF is possible.
|
| And STILL I get no apology from Wally who infered that I was lying.
| For shame!

Hang on... I'll cut you a slice from my round of gouda to go with that
whine... err wine.

CM

Radio question
 

Bobsprit wrote:
Yeah Wally.... 40 nautical miles for a good VHF is possible.

And STILL I get no apology from Wally who infered that I was lying.

If you think I inferred that you were lying, it would have been because the
evidence empirically presented would lead one to draw such an inference.
However, the word I believe you are attemptng to utilise is not 'infer', but
'imply'. To use 'infer' in place of 'imply' is slack.

I didn't apologise, because I made no such implication. I did question the
veracity of your claim, but did so with the qualification that I stand to be
corrected. This was clearly implied, and the inference thus readily
available to be drawn by the reader, by the title of the thread in which I
enquired into the veracity of your claim, namely, "Radio question" - this
very thread. I invite you to read the original post again. Furthermore, on
the matter of your attempting to troll for a butt-kiss, I responded to your
similar comment regarding this yesterday.

Happy now, battery boy?

Oh, when did you say your next trip is? Let me know - I'll keep my handheld
switched on. Hail me! Channel 9!


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Radio question
 

I did question the
veracity of your claim, but did so with the qualification that I stand to be
corrected.

Since Morris Cove is a specific distance and you sought clarification about VHF
range, the only alternative would have been that I was lying.
Therefore the inference was clear. You were wrong about VHF range and following
your challenging my claim, were alerted to this.
A good chap might say, "Sorry for doubting you."
Then again....

RB

Radio question
 

Happy now, battery boy?

Yes. Happy that you were wrong and I was right.
But maybe you learned something about radio?
Maybe.

RB

Radio question
 

Furthermore, on
the matter of your attempting to troll for a butt-kiss,

This is how you view a simple apology? I see.

RB

Radio question
 

Yeah ... Gosh Already... it's not as if Bob ever lied about anything before.

CM

"Bobsprit" wrote in message
...
| I did question the
| veracity of your claim, but did so with the qualification that I stand to
be
| corrected.
|
| Since Morris Cove is a specific distance and you sought clarification
about VHF
| range, the only alternative would have been that I was lying.
| Therefore the inference was clear. You were wrong about VHF range and
following
| your challenging my claim, were alerted to this.
| A good chap might say, "Sorry for doubting you."
| Then again....
|
| RB

Radio question
 

Yeah ... Gosh Already... it's not as if Bob ever lied about anything before.

There is no case in this NG where I have lied for any other reason, but to
troll and joke. All such lies were ALWAYS admitted by ME and were of a
generally unimportant nature.
I NEVER lie in areas about safety, where the subject of radio range clearly
falls. Neal has constantly claimed that his boat is good for ocean passages.
You won't ever hear me tell such tales.
What's more, I back up what I say with pictures and anyone may pay me a visit
if they so choose.

RB

Radio question
 

Bobsprit wrote:

There is no case in this NG where I have lied for any other reason,
but to troll and joke. All such lies were ALWAYS admitted by ME and
were of a generally unimportant nature.
I NEVER lie in areas about safety, where the subject of radio range
clearly falls. Neal has constantly claimed that his boat is good for
ocean passages. You won't ever hear me tell such tales.

May we take it, then, that you *do* know about traditional navigation? With
a newbie navigator and failing GPS batteries, you must surely concede that
there was a lack of proper preparation which could have led to a safety
issue arising. If your somewhat cavalier attitude to not having a decent
backup (batteries that aren't ob their last legs) is to be believed, then
the 'real' backup to possible errors by Suzy must be your own skills in
navigating using traditional means.

I realise that you may well really know about traditional nav, and are
trolling insofar as you make it appear that you don't, but, without
waylaying that appearance, the 'battery troll' does seem to contradict what
you say above. IOW, the battery troll is only a troll/joke if you have the
skills to supplant a failing GPS.


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Radio question
 

May we take it, then, that you *do* know about traditional navigation?

My rule here requires that I never admit to anything that might weaken my
control.

Capt RB

Radio question
 

With
a newbie navigator and failing GPS batteries, you must surely concede that
there was a lack of proper preparation

We never had a problem with navigation via the GPS as there is a power cable
for the unit. It was powered up for most of the trip. I also have a set of NH
batteries on board, always charged.

RB

Radio question
 

Bobsprit wrote:
May we take it, then, that you *do* know about traditional
navigation?

My rule here requires that I never admit to anything that might
weaken my control.

You do appear, however, to have painted yourself into a corner in your
foregoing post.




--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Radio question
 

If your somewhat cavalier attitude to not having a decent
backup (batteries that aren't ob their last legs) is to be believed, then
the 'real' backup to possible errors by Suzy must be your own skills in
navigating using traditional means.

Not only were we prepared, but my GPS 38 was also set to go if needed.
And though Donal and Jeff already figured it out, our "dinner stop" was to
avoid ebb with a strong NW wind on a night with a severe storm watch.
I can outsail most of the people here, Wally! If they felt otherwise, they'd
actually show up at some point to take me on!

RB

Radio question
 

To excel at trolling one must be very smart and very
knowledgeable like me. Then one acts a little dumb,
waits until a bunch of people jump at the bait and then
slams the jaws of the proffered trap shut with force
equal to the obnoxiousness of the victim.

Booby is really a poor troller because, although he
has the 'dumb' part down pat he hasn't the vast
knowledge and experience it takes to do the
job like yours truly.

S.Simon - a Captain with an aux/troll endorsement




"Wally" wrote in message ...
Bobsprit wrote:

There is no case in this NG where I have lied for any other reason,
but to troll and joke. All such lies were ALWAYS admitted by ME and
were of a generally unimportant nature.
I NEVER lie in areas about safety, where the subject of radio range
clearly falls. Neal has constantly claimed that his boat is good for
ocean passages. You won't ever hear me tell such tales.

May we take it, then, that you *do* know about traditional navigation? With
a newbie navigator and failing GPS batteries, you must surely concede that
there was a lack of proper preparation which could have led to a safety
issue arising. If your somewhat cavalier attitude to not having a decent
backup (batteries that aren't ob their last legs) is to be believed, then
the 'real' backup to possible errors by Suzy must be your own skills in
navigating using traditional means.

I realise that you may well really know about traditional nav, and are
trolling insofar as you make it appear that you don't, but, without
waylaying that appearance, the 'battery troll' does seem to contradict what
you say above. IOW, the battery troll is only a troll/joke if you have the
skills to supplant a failing GPS.


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Radio question
 

Bobsprit wrote:
With
a newbie navigator and failing GPS batteries, you must surely concede
that there was a lack of proper preparation

We never had a problem with navigation via the GPS as there is a
power cable for the unit.

I didn't think you had that during the trip?


It was powered up for most of the trip. I
also have a set of NH batteries on board, always charged.

So, the dud batteries story was a troll? (Quite apart from the 'losing the
ones you forgot to buy' story...)


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.

Radio question
 

"Steve Thomas" wrote in message
. ..
I seem to recall commercial advertisement for single mode fibres that
involved a graduated refractive index rather than extremely small
diameter.
One thing is certain, until the amount of work involved with polishing the
ends is reduced, it will never replace copper wire for low cost or casual
applications.


We've just finished putting in 1700 fibre links at US$111.00 each.

The ends were all hand polsihed, but we used a special connector that almost
eliminates split fibre.

Personally, I think that soon fibre will be economical for general use.
How much does Cat6 cost?


Regards


Donal
--

Radio question
 

"Bobsprit" wrote in message
...

Since Morris Cove is a specific distance and you sought clarification
about VHF
range, the only alternative would have been that I was lying.

It isn't that complicated at all! If you wrote it, then a lie is inferred.

Look it up in your copy of "Hutchins"!

Regards

Donal
--