| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 900.1 | re: fish size | PSMURF::MURPHY | | Thu Oct 20 1988 09:47 | 8 |
| Joe,,I have the 4000 LCR as well and I think the way it works is
that each pixel represents a given distance depending which scale
you're on. At the 15' depth setting, each pixel is 1 1/2", at 30'
it is 3" etc. ( I might have the exact number screwed up ). So even
if you see one on the top, it still follows that relationship.
Bob Murphy
|
| 900.2 | CUTE AS A PIXEL | SCOMAN::WOOLDRIDGE | Worm fishermen have stiffer rods | Thu Oct 20 1988 12:30 | 9 |
| YO,
Joe,
I was under the impression that it will "locate" fish, but
is not accurate as to the "size" relationship. ie; many pixels =
big Bass, 1 pixel= small 12" Bass (like you ususally catch).
In one of the past Bassmasters there was a good article on
this. Not sure which one......
NIGHTCRAWLER~~~~~~~~~~
|
| 900.3 | You should see what a whale looks like! | AD::GIBSON | Lobst'a Ayah | Thu Oct 20 1988 13:09 | 21 |
| The answer to your question is " It Depends".
I will substanuate as follows. If the distance for the signal to
travel a predetermined path out and back in a measured time is held
constant,and the path is broken by an object ( Fish) the angle of
deflection upon the intervening object will determine the ammount
of signal returning to the transducer at a given moment; Therefore
not only will the size of the fish determine the ammount of pixel
illumination, The angle at which the signal hits the fish will have
bearing.
Try this test. Take a piece of plywood wieghted down with two ropes
on it so you can hold it flat or tilt it. Lower it to different
depths under your boat and watch your sonar. Try tilting it at
different angles - The size of the plywood has not changed, only
the reflection on the sonar. This is good practice and will give
you a clearer understanding of what different size objects look
like at different depths.
Walt
|
| 900.4 | Easy to read as the paper... | NAC::SWEET | Capt. Codfish. Desperatly seeking Charlie | Thu Oct 20 1988 13:33 | 19 |
| My paper recorder diffinetly shows fish size. You can even tell
by the texture of the mark and where it is as to what type of fish
it its. Bait fish like sand eels show up as little light fuzzy marks,
bigger bait like pogies show up as black clouds, school pollock
show up as a thin light fuzz just off the bottom while cod show
up as darker arches just rising off the bottom. Blues show up
as a group of 5-10 arches usually around 30ft. Dog fish show up
as very short arches in big schools almost at any depth but they
have a definit texture difference between them and blues. The
big T (tuna) show up a large dark arch (up to 3/4 in long). I'm
sure every machine is different you just have to learn to read
them.
Rememeber on thing, it works both ways, I have caught fish when
I see them, I have caught fish when I haven't seen them, I have
seen fish and not caught them (I hate when that happens) and I
have not caught fish when I haven't seen them (this is easy to do!).
Bruce
|
| 900.5 | Fish Size....still a mystery!! | MENSCH::SCHOLZ | Ron....and thanks for all the fish | Thu Oct 20 1988 16:13 | 42 |
| Joe, let me try and answer your question real simply first and then
try and explain the answer..........NO, not really. The size of
the fish is a function of many varibles. Not the least of which is
the speed of the boat, speed of the fish, direction of boat and
fish, depth and water objects where the fish is.
Lets see if I can explain this. First the picture (display you see)
has no relation to the actual area that the finder is looking at.
The area (under a cone - that is what the signal is shaped like)
varies with the depth you are looking at. The deeper you look, the
more area you are looking at. Any echo within this area will be
returned and displayed for you. This is a two demensional display
of a three demensional world. The echo (from within the area under
the cone) doesn't know left right, front back. It (the system) only
knows that there is something within the area it just looked at.
So it paints a pixel on the screen for you. Now that one pixel
is made up of many echos, not just one. Now, for the rub...TIME
If you are standing still (or your boat is ;^) the echos will remain
constant.....that is they will be exactly the same and the system
will show you a FLAT line going across the display. Now a fish swims
into the area under the cone......depending on how fast the fish
is swimming will determine how long he is in this area and therefore
how many "times" the system gets an echo off of him. This will be
translated to how many times the echo will show up on your display.
The system simply moves the pixels along for you at some rate you
or it chose. So as long as it is getting an echo it will give you
a pixel and these will add up across the screen as long as the fish
is in the area the finder is looking at. Therefore if the fish is
moving slowly it will be there a long time and paint on the screen
accordingly. If moving fast, not so long and since we tend to look
at the size of the display to try and get an idea of the size of
the fish we are completely fooled. However, we do know that a fish
is there. And that is all we can ever really know. You can see that
the same applies if the boat is moving and the fish is still and
all combinations for boat and fish and depth.
I hope that helps. There is alot more to this, but it comes down
to time and depth (and frequency). Solid bottom objects are treated
the same way.
Tight lines, Ranger Ron
|
| 900.6 | Walkin in my winter underwear. | ADVAX::ALLINSON | | Fri Oct 21 1988 09:50 | 17 |
|
Anyone out there ever use an LCR for ice fishing???
Am interested,but I don't know if it would be worth it
considering most lakes in Mass are fairly shallow.
I have read alot about them in the IN-Fisherman and
it sounds great if your looking for school fish such as
sunfish,perch,etc.... and I figure if you can find these
then you can get the gamefish that eat them.Are they
just an pain in the @&& or will they produce more FLAGS!!!!
Any comments?
The Keg
|
| 900.7 | | VAX4::TOMAS | Joe | Fri Oct 21 1988 12:24 | 25 |
| Thanks all for the input. Ron, I kind of suspected that determining fish
size would be difficult, however, I do think that I'll do some experimenting
next spring. Considering most of my fishing is in 30' or less, I'll drop
something (1' in lenght) over the side under the transducer and try to get
some relative measurements. Maybe this way I'll have a better idea whether
to work an area because I actually see fish because I'll have an approximate
idea to its size. No use fishing for shorts!
Keg...I've used my Lowrance flasher (not LCR) for ice fishing and it can
help make a difference. First of all, if the ice does not have a lot of air
trapped in it, you can actually read thru it to determine the depth. Simply
pour a little water (or even something like Wesson oil) on the surface of
the ice, place the transducer in it and locate bottom. If you can do it, it
will save a lot of time having to drill a hole.
Once you've drilled a hole, put the transduced in it, off to one side, and
start jigging. The LCR or flasher should show your jig and anything that
moves within range. One advantage to using an LCR is that it will prepare
you in advance for a potential strike. Also, if you're fishing deep water
for lakers, etc., it will help you to determine the proper depth to fish.
Not all fish hug the bottom.
Have fun!
-HSJ-(who_isn't_looking_forward_to_winter!)
|
| 900.8 | Isn't this topic a little early this year ??? | VICKI::DODIER | | Fri Oct 21 1988 12:26 | 18 |
| re:6
One obvious thing to think about is how easy is it for
you to run around making new holes. If you have a gas ice auger
and a snowmobile to cart it around or the ice isn't that thick,
then no problem. If this is not the case it may become just one more
thing to carry and possibly break.
Almost all my ice fishing is for smelt and white perch in tidal
water so it definetly wouldn't do much good for something like that.
About all it might do is show you what you aren't catching.
RAYJ
P.S. It may help you keep those dead tomycods off your line :-) It may
even keep Joe from trying to fish out of Don's hole because there are
no fish in his hole, right Don ;-)
|
| 900.9 | I really should try it at Winny | CIMNET::GAFFNEY | NASCAR **** 600 HORSEPOWER | Fri Oct 21 1988 13:48 | 5 |
| I used my portable LCR in 3 different lakes last winter and all
I ever saw was my shinner swimming around :*(
But I must say, it does work well at the Quabbin, which is where
I'm headed Sunday, only two weekends left.
|
| 900.10 | ice fishing | SCOMAN::KERSWELL | | Mon Oct 24 1988 11:08 | 11 |
| RE;6
In Fisherman, I read that same article in the last In.F copy about
ice fishing, sounds like it makes sense to have one along with ya,
depending on where your going fishing,
Also, if we read the same article, did you notice the little carrying
box you can build to hold it at a level possition? I think the carrying
box is made up so it doest fall through an 8" hole also,, cause
it would be a pain in the whoossy whutsas jigging for an LCR, but
would become an expensive catch.
Ronni
|
| 900.11 | Hello down there!!! | ADVAX::ALLINSON | | Mon Oct 24 1988 11:26 | 13 |
|
Re:.10
Yes,that was the same article I read.I like the idea
of the box and it also had a pole on the side for the
transducer so it would stay level in the hole and then
you would get an exact picture of what was directly
below you and not to the sides.
The Keg
|
| 900.12 | dead tomycods don't wear plaid | DONMAC::MACINTYRE | Fish are rising up like birds | Mon Oct 24 1988 12:15 | 17 |
| � P.S. It may help you keep those dead tomycods off your line :-) It may
� even keep Joe from trying to fish out of Don's hole because there are
� no fish in his hole, right Don ;-)
I'd take RayJ's advice on the dead tomycod tip, nobody catches dead
tomycod like RayJ. Most people probably are not aware of this but
RayJ happens to be the most well respected dead tomycod angler this
side of the Lamprey.
Yeap, it's pretty tough keeping HSJ out of other people's holes...
He never has much luck with all those Crazy Crawlers that he insists
on using in all his holes. So eveytime someone else get's a hit,
he's always right there, "MIND IF I SHARE THIS ONE WITH YA!!!"
Meanwhile he's already got his weighted treble hook down there trying
to snag the fish off your line before you got it up... 8^)
Don Mac
|
| 900.13 | | VAX4::TOMAS | Joe | Mon Oct 24 1988 13:47 | 7 |
| I don't even wanna discuss or comment about ICE FISHING!
I'M DEPRESSED....I JUST WINTERIZED THE BOAT THIS WEEKEND!
A A R R R G H !!
-HSJ- (whose_wife_is_going_YEAH!)
|
| 900.14 | Don't put them poles away yet it ain't ice-in. | ADVAX::ALLINSON | | Wed Oct 26 1988 10:48 | 14 |
|
Re:.13 A A R R R G H !!
You don't have to give it up yet Joe.We are still getting
BASS on shiners down at Lake Urine (Cochituate).I tell ya
They are in 2-3 feet of water not 5 feet from shore.I also
found out that they must have put more Tiger Muskies in there
cause we keep catchin 8-12" fish that are eatin 4-6" bait.
The Keg (who can't wait to walk on water)
|
| 900.15 | Tiger Muskies? | CASV02::PRESTON | NO Dukes!! | Wed Oct 26 1988 14:09 | 8 |
|
� I also found out that they must have put more Tiger Muskies in
� there cause we keep catchin 8-12" fish that are eatin 4-6" bait.
I'm not sure I understand... please explain.
Ed
|
| 900.16 | HUMMMMMMMMM.... | SCOMAN::WOOLDRIDGE | Worm fishermen have stiffer rods | Wed Oct 26 1988 14:14 | 5 |
| YO,
Yes, I think I do not understand you either Keg. Do you mean
you are catching 12" Tigers or do you mean 12" bass is all you catch
or what do you mean? I'm so confused.
NIGHTCRAWLER~~~~~~~~
|
| 900.17 | What'd he say?? I knew that. | ADVAX::ALLINSON | | Wed Oct 26 1988 15:04 | 15 |
|
Re: HUH????
We have been catching 8" to 12" Muskies that I believe they
just stocked in the Lake.We were using 4" to 6" shiners for
bait.As for the bass,alot have been 12" and a couple up to
16".
Sorry,I type to fast for my brain??
The Keg
|
| 900.18 | Hungry baby monsters | SCOMAN::WOOLDRIDGE | Worm fishermen have stiffer rods | Wed Oct 26 1988 15:53 | 4 |
| YO KEG,
8" fish on 6" shiners. I love it!
NIGHTCRAWLER~~~~~~~~~
|
| 900.19 | Lake Mess monster AKA Messie! | ADVAX::ALLINSON | | Thu Oct 27 1988 14:21 | 14 |
|
Re:Small fish on large shiners.
These small monster will probably grow 6 inches before ice-in.
From what I can gather a pike or muskie will grow a foot or
more in there first year depending on how well I feed them.
Sure would like to see one of them grow inside a fishtank,
but it would probably cost a fortune in shiners,neighbors
pets etc......
The Keg
|
| 900.20 | I think we need a bigger boat!!!! | ADVAX::ALLINSON | | Thu Nov 10 1988 15:17 | 11 |
|
This summer I recall fishing Lake Cochituate,we were using
an Eagle LCR.I noticed while cruising over 40 feet of water
a line of 4 dots in a row at 30 feet could this be the monster
Muskie/Pike I have been looking for???How big do you think
this THING was??
The Keg
|
| 900.21 | X5 anyone? | NAC::SWEET | Capt. Codfish...GW Fishing Team | Thu Nov 10 1988 16:24 | 4 |
| Anyone have any experience with a lowrance X5? The new grady has
one on it and I would like to know what to expect out of it.
Bruce
|
| 900.22 | call me | HPSCAD::BPUISHYS | Bob Puishys | Mon Nov 14 1988 14:13 | 5 |
| I have one Bruce. Call me some time and I will give you all
the details.
Bassin Bob dtn:297-7841
|
| 900.23 | 20� cone angle transducer | MPGS::NEAL | I'm the NRA | Thu Jan 19 1989 14:07 | 36 |
| I was going to enter this under the fishing sonar note, but it seems that
changed to a SSS note. :-) I thought it might be easier to find here.
Rich
Eagle/Lowrance fans:
The following chart is depth in relation to diameter of bottom on the screen
when using a transducer with a 20� cone angle. It might help you understand
why you aren't catching that fish right under the boat. :-)
20� Cone
Depth Diameter
10' 3.5'
20' 6.9'
30' 10.0'
40' 13.9'
50' 17.4'
60' 20.8'
70' 24.3'
80' 27.8'
90' 31.3'
100' 34.7'
110' 38.2'
120' 41.7'
130' 45.1'
140' 48.6'
150' 52.1'
160' 55.6'
170' 59.0'
180' 62.5'
190' 66.0'
200' 69.5'
|