Question about transducer offset

[yupitsme]

Some people.... I swear.... MichaelJ3. The work you did creating those diagrams is not worthless. Common sense folks have the ability to realize we are dealing with a “fluid” environment. There are undefined variables that need to be considered. NORMAL folks get that. I for one will not be “throwing out” the information presented in those diagrams. Typically, in problem solving, the assumption of “perfect” is the starting point then the variables are applied and reality begins to take shape. But to make an all encompassing statement that your starting point, which you clearly stated was indeed simply a starting point, was worthless is asinine. ALL problem solving begins with what we know while we struggle, at times, to fill in the unknown. Thanks again for the effort expended.

There’s a lot more I could add - A LOT. But I won’t!

[MichaelJ3]

That is a LOT of really good work. So kudos, wish I knew how to create those images.
In the real world however your boat is NOT perfectly parallel with the bottom. Bow rise is always there to varying degrees...the angles shown here are perfect 90 degrees to bottom....
almost impossible in real life...assuming the transducer is in fact seeing straight down..again not likely. So on paper what you show is excellent and well done.

Figure in bow rise, transducer tilt both forward and port to starboard....even a minimum of just a few degrees...and all of that is out the window.
SO, for discussion example...my boat using a Suunto clinometer or Iphone app, pretty accurate,... bow rise at slow idle is 6 degrees, say my transducer mount is in error...slightly tilted toward bow...couple, maybe three degrees which s a VERY easy error...Now this diagram which is great on paper is now useless since we are looking at a target way in front of the hypothetical "straight down" 90 degree perfect transducer view.

That is my only point in saying that each angler needs to test what he has to consistently locate the target...by whatever means. But to rely on perfect angled hypothetical scenarios is questionable on the water. It just is not like that at all. Way tooooo many variables to assume anything is dead on accurate. I said in a prior post this will make your brain explode...as most can see it is a VERY difficult set of parameters to try to justify an absolute answer.
My money goes on the old orange float markers. :))) I think with technology now, to drop the floating marker ON the target (with double lead weights to counter current etc) that we could idle back over the marker and put the GPS puck right on top of it...and mark it with pretty good accuracy. Assuming the transducer is pointing perfectly straight down, then would lessen the "offset" somewhat.
This really is a brain twister since everything on the water is always inconsistent. Each angler, each boat, different installations etc. Very tough, if not impossible to figure it accurately and dependably.
Tommy
Prostaff
Lowrance/Navico

Exactly why I added the words about boat listing, tilting the transducer, and said my net was that GPS gets you in the area, rest needs something else. I usually use the Lindy dumbbell marker bouys

[jjjaymmman]

I know that you believe you understand what you think I said, but I'm not sure you realize that what you heard is not what I meant.

Ok, that one was freaking hilarious!!!!

[prostaff1]

Michael J3....Thought what you did was great...about as good of display as I have seen. As I said, my only point is, and with your comments as well, to pin this down with any degree of certainty is darn near impossible. With the variances in GPS itself and those unknowns, and add the tilts, less than ideal angles and it is REALLY tough to come close to any claim that someone can pin it down. Which is why in an earlier post I suggested casting to the target "area" with braid and weight, such as ounce of Tungsten to try to feel the target...which, location is the goal. I think I have exhausted my exploded brain on this...since there is not a dependable answer, and the different methods, some good some not...not much use in beating the dead horse to death again. So to speak...
Tnx for the work and excellent display..!! Back to the orange markers and weighted string :)))
Tommy
Prostaff
Lowrance/Navico

[MichaelJ3]

Tommy,

Exactly. A good straw man would be assume GPS gets you within a boat length. On a good day, maybe half a boat length.

[jjjaymmman]

What a mess.... just add a 360 unit and you won't have this problem anymore.

You could also get spotlight scan

[twitch]

very informative and well done by both prostaff1 and Michaelj3 thank you for putting your thoughts and knowledge on this thread

[RangerGW17]

What a mess.... just add a 360 unit and you won't have this problem anymore.

You could also get spotlight scan

Oh look,it's the bird troll again... still looking for a life I see

[yupitsme]

Oh look,it's the bird troll again... still looking for a life I see

Jjjjjjjjjjjjjj you're gonna have to get a new pair of sunglasses - ev'a boddies starting to recognize you with the ones you have now!

[jjjaymmman]

Oh look,it's the bird troll again... still looking for a life I see

Lol, I said you could get spotlight scan.

[RangerGW17]

Lol, I said you could get spotlight scan.

I'm not sure what that is, sounds like something used for deer hunting at night

[jjjaymmman]

I'm not sure what that is, sounds like something used for deer hunting at night

Go buy one. I'm sure you can find one real cheap.

It's a "game changer" lol.

[RangerGW17]

Go buy one. I'm sure you can find one real cheap.

It's a "game changer" lol.

I think I will pass, I'm not much into gamechangers... A new set of Irons and a new 3 wood sounds better too me

[jjjaymmman]

I think I will pass, I'm not much into gamechangers... A new set of Irons and a new 3 wood sounds better too me

Add an Approach S60 to your purchase list!

[RangerGW17]

Add an Approach S60 to your purchase list!

My skill level isn't high enough for electronic golf gadgets yet.. under 90 is a good day for me

[FES313]

I think this is relevant.

[sonarandgps]

Tommy, you can lead a horse to water.....

[jjjaymmman]

... I know first hand that the Elite Pros use that practice among other methods off season to create new info maps and spots.
I have made maps for some of them and marked the higher productive spots for select elite pros.
Tommy
Prostaff Lowrance/Navico
Prostaff Marine Specialist/Navionics

Whoa!!! Would this be considered cheating by BASS rules since you marked waypoints for select pros??? Or have you made these waypoints publicly available for everyone? And if so, where can we all find them?

2019 Elite Rule # C3 (ii) (a). "2019 qualified Elite anglers cannot gather waypoints or specific fishing locations i.e. creek, river, area of the lake, etc. from any source that is not publicly available."

Especially if the elite pro is fishing a "high[ly] productive spot" you marked for them in the past to win a current tournament! You might need to discuss this with BASS for clarification.

[RangerGW17]

Whoa!!! Would this be considered cheating by BASS rules since you marked waypoints for select pros??? Or have you made these waypoints publicly available for everyone? And if so, where can we all find them?

2019 Elite Rule # C3 (ii) (a). "2019 qualified Elite anglers cannot gather waypoints or specific fishing locations i.e. creek, river, area of the lake, etc. from any source that is not publicly available."

Especially if the elite pro is fishing a "high[ly] productive spot" you marked for them in the past to win a current tournament! You might need to discuss this with BASS for clarification.

Jay, we finally agree on something! Nothing worse than a pro that is actually just a potlicker having someone else do the work for them! Hope these "pros" that have locations marked for them are caught!

[H-D Dad]

I'm not positive, I believe that only applies to off limit period. Not all the time.