T.R | Title | User | Personal Name | Date | Lines |
---|
401.1 | It sounds like B.I.P. Is it? | SALEM::JUNG | half-day?>>> | Mon Aug 01 1994 11:15 | 1 |
|
|
401.2 | | DELNI::OTA | | Mon Aug 01 1994 11:28 | 11 |
| John
If you mark your spot I guarentee a few things will happen. Someone
will fish it, someone will use a lorance to mark it then someone will
remove your marker.
The only way you can do this is as you said triagulate three landmarks
or buy one of the new hand held lorance units
oats
|
401.3 | Not simple, but.... | BUOVAX::SURRETTE | | Mon Aug 01 1994 12:02 | 37 |
|
John,
What ever you, don't mark it permanently. It's the quickest way
to turn a nice unknown spot, into just another pounded spot, post
haste.
The only way to mark it, is to use "triangulation". It's method
that works if you can find 4 landmarks easily to mark the location.
As Brian said, you can use three spots, but it's not as accurate.
In order to identify a spot, you want to line up you landmarks as
follows:
o (landmark 1)
o (landmark 2)
(landmark 3) o xxx (your spot) o (landmark 4)
The key is landmarks #1 and #2. If you can find two land marks that
are aligned, but at different distances, you'll find your location
more easily. If you can't find landmarks aligned in positions
1 and 2, you'll have to settle for 2, 3 and 4.
Also, in regards to Brian's other suggestion regarding hand help
Loran or GPS systems, these devices are typically *NOT* accurate
enough to find such small humps etc.
Good luck,
Gus-man
|
401.4 | y | ECADSR::BIRO | | Mon Aug 01 1994 13:05 | 29 |
| The THREE land marks that I use now will give me a better point
then a non-militray GPS receiver. This spot is about then 10 ft
in diameter. I was told about in in 1991 and it took me this long
to find it. (as most lied about it location)
Thanks Gus-man, the idea of landmark 1 & 2 is a great one
and that should give me the + - 10 ft that I need to find this
spot. This way I don't have to look over my shoulder and add that
error into the location. One of my current land-marks is very
narrow and will make a nice land mark # 2.
One last trick I found out...
How to locate most of the shallow humps in the lake...
Go to the local boat house and find out who has sheared off
the most props pins in one day, in this case her name was Kim.
She has the lake record of SEVEN in one day..
Kim was more then willing to tell me where all the spots are
that can break a prop. Most were great spots, but this rock pile was
found by a Navy Plane during WWII when the Navy use the lake to practice
landings. One plane hit the rocks and flipped over.
thanks john
ps I was only going to leave the marker in long enougth to move
away from the spot to see if I could find a better land mark,
ie with land-mark 1 & 2 and the hot spot I should be able to
get less the 5 deg error or within 8 ft.
|
401.5 | | GNPIKE::HANNAN | Beyond description... | Mon Aug 01 1994 15:19 | 4 |
| How about using a hand-held compass along with the landmarks ?
sort of like dead reckoning ?
/Ken
|
401.6 | | BUOVAX::SURRETTE | | Tue Aug 02 1994 11:05 | 25 |
|
.re -1
A compass???
John,
If this rockpile is shallow enough to hit with a prop, I cannot
see how you could have trouble finding it even if you can get
only within 50 feet of it.
Of course I can think of two exceptions:
1) You're fish South Watuppa (Rock-tuppa) where the water
is so stained that you can't see 6 inches into the water.
2) You're looking for this small spot in a *huge* lake (unlikely
in a 7 foot boat).
Just curious.....
Gus-man
|
401.7 | | ECADSR::BIRO | | Tue Aug 02 1994 14:29 | 33 |
| Normall the water level would be 4 ft, but at times it could be as low
as 2 ft. The lake is lowered 2 to 5 ft each fall for spring flood
control. The winter run off and spring rains then set the summer levels
run + or - about 1 foot. A near by sand bar (18 inch) is what Kim
most likly has been hiting, plus how she trims the boat I think
see needs a good 3 ft.
The Water is stained, visability varies from 2 to 6 ft, worse on
weekends.
It is a very small spot about the size of my boat. It has
heavy boat traffic, a strong current, and a strong wind. If I was off
by 10 ft I dont think I would see the spot.
I will try the two post in a line trick.
The idea behind this one is to keep the two post in line, when
I see the 2nd post I am off line.
me -------hotSpot---------------------post1----post2
I will post the results.
|
401.8 | | MONTOR::HANNAN | Beyond description... | Tue Aug 02 1994 14:42 | 13 |
| re: <<< Note 401.6 by BUOVAX::SURRETTE >>>
> A compass???
Why not ? It would be a helluva lot more accurate than using just
your vision against landmarks. If you had n degrees for landmark 1,
and m degrees for landmark 2 for a given position, you should be able
to get back to the same position, or at least close.
Dead reckoning was a technique I learned in a coast guard class,
where you use a hand-held compass (preferably) to determine where you are.
/Ken
|
401.9 | Yet another way to locate sunken islands | ECADSR::BIRO | | Mon Oct 17 1994 08:23 | 9 |
| My next door neighbor told me about a way to find most sunken islands,
wait untill winter,then the ice above the sumerged island will bulge up,
now you can walk out to it and find accuracte shore line markers so
that you can return to it in the spring. This one should do that as it
is the only rock pile and all around it is a muddy bottom, plus it will
be only about 6 ft below the stiff water.
enjoy john
|
401.10 | Maping the Island and Rock concentrations | ECADSR::BIRO | | Mon Dec 12 1994 13:29 | 11 |
| This year the Dam needed repairs. To do this, they lowered the lake
about 5 ft instead of the normal 3 ft. The results were that the
sunken island was just above the water line for about 3 days. I was
able to get several good photos and a video of the area. I was also able
to get detail of boulder concentrations, breaks from rock to gravel or
clay to muck areas. I tried to find a note on making a readable map
for a lake but could not find one. Could someone point me to the right
area else If interest I will start one.
john
|
401.11 | ex | DELNI::OTA | | Mon Dec 12 1994 15:05 | 9 |
| I don't know if this is right for here or belongs elsewhere, but I have
also found that hot spots physically change from year to year.
Sometimes the vegetation changes or other changes like increased mud or
dead debris alters the location. Over the years I have seen my
favorite hot spots go stone cold for a couple of seasons before
returning later when it changes again. Anyone else have this
experience?
Brian
|
401.12 | | XCUSME::TOMAS | I hate stiff water | Tue Dec 13 1994 07:56 | 4 |
| re.: .10
Hey John... forget about trying to map that hump. They drained the lake
down so low that all the bass are now down river!
|
401.13 | detail mapping | ECADSR::BIRO | | Tue Dec 13 1994 09:36 | 29 |
|
The map is for next year, I am trying to make it both a bottom
structure map and one that has land reference points so that I
can return to these spots as suggested in the previous notes.
The hump now under water, it was only out of the water for about 3 days
and if you did not know it was there you would not have seen it. It
look like a pike moving threw the water more then a fix structure.
There is a drop off next to the hump and this should be a good
area for early ice fishing.
The area I like to fish has no water. I was able to walk the area and
mark all the logs locations, rock areas, the deep channel location,
and any surface changes. I have also found two unmarked under water
inlets. Next year I can add the seasonal weed growth. I now have
a better understanding of some areas that are better for SMB
or for LMB.
I also took overlapping photos so I have a 360 degree view of the
lakes bottom structure. Now all I need a good method of putting it on a
flat map.
john
|