I've had shoot-thru transducers mounted on the center line with NO
appreciable loss of signal. Yes, the prohibition is normally for transom
mounted t'ducers....

But, you have a number of suggestions for trying any position out...why not
build the dam of plumbers putty on the center line and try it out also?
--
RichG manager, Carolina Skiff Owners Group on MSN
http://groups.msn.com/CarolinaSkiffOwners
..

wrote in message
ups.com...
I will keep the transducer away from the center line. I thought the
"avoid the center line" restriction only applied to "transom mounted"
transducer. I didn't know that it also applies to "shoot through hull"
transducer. Thanks for the warning.

Jay Chan


Russ K wrote:
Mounting the transducer at the center line is not recommended.This is
because the thickness of the hull .This would definitely cut down on the
return signal and make the readings erratic.
wrote in message
ups.com...
I would like to get some info about fishfinder:

1. Is this OK to mount a "shoot through hull" transducer right at the
center line of the boat hull? The center line of the bottom of the
hull
is smooth; therefore, I am not expecting any turbulent at the center
line. The reason why I ask is that we are not supposed to mount a
transom-mount transducer at the center line where the outboard motor
is
to avoid the turbulent from the propeller. I am hoping that this
restriction only applies to transom-mount transducer, and doesn't
apply
to "shoot through hull" transducer.

2. Is "shoot through hull" transducer good enough for scanning the
sea
bottom for fishes? In other words, I would like to know if I can use
the fishfinder as a fish-finder instead of using it as a depth-sounder
if I use a "shoot through hull" transducer. I only intend to use the
fishfinder in shallow water, like 10-ft to 150-ft; hopefully, losing
some range will not be a problem.

3. Does 3-D fishfinder present a relatively static picture instead of
scrolling endlessly like a regular fishfinder? I have a hard time to
interpret the scrolling image displayed in a regular fishfinder to
relate it to the sea bottom. I am hoping that a 3-D fishfinder can
solve this problem. Yes, I have already read a book about fishfinder;
but I still cannot interpret the scrolling image.

4. Is 3-D fishfinder any good? 3-D fishfinder seemed to be "hot" a
couple years or more ago. Recently when I checked Cabela's web site, I
could only find _one_ 3-D fishfinder. Is this 3-D technology too
immature that no other manufacturer wants to try?

Thanks in advance for any info.

Jay Chan

RichG wrote:
I've had shoot-thru transducers mounted on the center line with NO
appreciable loss of signal. Yes, the prohibition is normally for transom
mounted t'ducers....

But, you have a number of suggestions for trying any position out...why not
build the dam of plumbers putty on the center line and try it out also?


On a sailboat with a rounded hull like my Sandpiper 565, the common
wisdom is to mount the transducer close to the centerline and forward of
the keel.
You want the unit to shoot straight down to the bottom, not off at an
angle and the keel would create some turbulence.

"RichG" wrote in message
om...
I've had shoot-thru transducers mounted on the center line with NO
appreciable loss of signal. Yes, the prohibition is normally for transom
mounted t'ducers....

But, you have a number of suggestions for trying any position out...why
not
build the dam of plumbers putty on the center line and try it out also?
--
RichG manager, Carolina Skiff Owners Group on MSN
http://groups.msn.com/CarolinaSkiffOwners

Don't Carolina skiffs have flat bottoms though?

Thanks for the good news. How good the signal that you get from the
shoot-through-hull transducer that you mount at the center line? Is it
"good enough" for you to spot fishes in the water column? Or is it
just good enough for a depth gauge, but not for a "fishfinder"?

And yes, I will likely try many different spots inside the bilge area
including the center line. I will flood the bilge area with water for
the test anyway; testing one more spot for the purpose of finding
possible spots (for further testing) should only take minutes if not
seconds.

Jay Chan


RichG wrote:
I've had shoot-thru transducers mounted on the center line with NO
appreciable loss of signal. Yes, the prohibition is normally for transom
mounted t'ducers....

But, you have a number of suggestions for trying any position out...why not
build the dam of plumbers putty on the center line and try it out also?
--
RichG manager, Carolina Skiff Owners Group on MSN
http://groups.msn.com/CarolinaSkiffOwners
.

wrote in message
ups.com...
I will keep the transducer away from the center line. I thought the
"avoid the center line" restriction only applied to "transom mounted"
transducer. I didn't know that it also applies to "shoot through hull"
transducer. Thanks for the warning.

Jay Chan


Russ K wrote:
Mounting the transducer at the center line is not recommended.This is
because the thickness of the hull .This would definitely cut down on the
return signal and make the readings erratic.
wrote in message
ups.com...
I would like to get some info about fishfinder:

1. Is this OK to mount a "shoot through hull" transducer right at the
center line of the boat hull? The center line of the bottom of the
hull
is smooth; therefore, I am not expecting any turbulent at the center
line. The reason why I ask is that we are not supposed to mount a
transom-mount transducer at the center line where the outboard motor
is
to avoid the turbulent from the propeller. I am hoping that this
restriction only applies to transom-mount transducer, and doesn't
apply
to "shoot through hull" transducer.

2. Is "shoot through hull" transducer good enough for scanning the
sea
bottom for fishes? In other words, I would like to know if I can use
the fishfinder as a fish-finder instead of using it as a depth-sounder
if I use a "shoot through hull" transducer. I only intend to use the
fishfinder in shallow water, like 10-ft to 150-ft; hopefully, losing
some range will not be a problem.

3. Does 3-D fishfinder present a relatively static picture instead of
scrolling endlessly like a regular fishfinder? I have a hard time to
interpret the scrolling image displayed in a regular fishfinder to
relate it to the sea bottom. I am hoping that a 3-D fishfinder can
solve this problem. Yes, I have already read a book about fishfinder;
but I still cannot interpret the scrolling image.

4. Is 3-D fishfinder any good? 3-D fishfinder seemed to be "hot" a
couple years or more ago. Recently when I checked Cabela's web site, I
could only find _one_ 3-D fishfinder. Is this 3-D technology too
immature that no other manufacturer wants to try?

Thanks in advance for any info.

Jay Chan