Perspective Shad

12' of water. fish were suspended about half way down.

Very limited time but bracket was at 90* (parallel to water surface)

I will bend the bracket to about 102* and try again Monday.

https://www.youtube.com/watch?v=h1LUWhkXAjI

That looks pretty cool!

Man, I need to whip me up a bracket while I'm waiting for my Garmin P-mount. Can't wait to look at crappie under a dock in Perspective mode.

That looks good. Why do you need to bend the bracket what will that change? Mine is set the same as yours but I do have adjustments I can change. Don

Quote:

---

Originally Posted by D Johnson

That looks good. Why do you need to bend the bracket what will that change? Mine is set the same as yours but I do have adjustments I can change. Don

---

The LS transducer's beam is only 20 deg vertically in this orientation. If the transducer is parallel to the water surface only 10 degrees of beam is going down toward the bottom and the other 10 degrees is going toward the water's surface. It would be around 68 feet out from the transducer before the beam would contact the bottom, if the transducer was 12' from the bottom.

If you are making a bracket, then you would want to bend it approximately 10 degrees down from horizontal to be able to utilize the full beam. I would agree that maybe 12 degrees (90+12 =102 total) is better, as it would keep you from seeing waves on the surface in all but the choppiest days, when you aren't likely to be using LS anyway.

In 12' of water and the transducer sitting at a 102 degree angle, the lower side of the beam will be 22 degrees from parallel with the surface, resulting in a bottom reading that is much closer to the boat. The bottom that you would first see in this case would be 29 feet away from the transducer.

Quote:

---

Originally Posted by MIZ-ZOU

The LS transducer's beam is only 20 deg vertically in this orientation. If the transducer is parallel to the water surface only 10 degrees of beam is going down toward the bottom and the other 10 degrees is going toward the water's surface. It would be around 68 feet out from the transducer before the beam would contact the bottom, if the transducer was 12' from the bottom.

If you are making a bracket, then you would want to bend it approximately 10 degrees down from horizontal to be able to utilize the full beam. I would agree that maybe 12 degrees (90+12 =102 total) is better, as it would keep you from seeing waves on the surface in all but the choppiest days, when you aren't likely to be using LS anyway.

In 12' of water and the transducer sitting at a 102 degree angle, the lower side of the beam will be 22 degrees from parallel with the surface, resulting in a bottom reading that is much closer to the boat. The bottom that you would first see in this case would be 29 feet away from the transducer.

---

If I am following you correctly and I believe I am...how much angle would you have to have in perspective view to see bottom 15' in front of boat in 15 feet of water? I use my livescope "always" for chasing shad and I love it. Saves me so much time and throwing blindly!

Quote:

---

Originally Posted by MIZ-ZOU

The LS transducer's beam is only 20 deg vertically in this orientation. If the transducer is parallel to the water surface only 10 degrees of beam is going down toward the bottom and the other 10 degrees is going toward the water's surface. It would be around 68 feet out from the transducer before the beam would contact the bottom, if the transducer was 12' from the bottom.

If you are making a bracket, then you would want to bend it approximately 10 degrees down from horizontal to be able to utilize the full beam. I would agree that maybe 12 degrees (90+12 =102 total) is better, as it would keep you from seeing waves on the surface in all but the choppiest days, when you aren't likely to be using LS anyway.

In 12' of water and the transducer sitting at a 102 degree angle, the lower side of the beam will be 22 degrees from parallel with the surface, resulting in a bottom reading that is much closer to the boat. The bottom that you would first see in this case would be 29 feet away from the transducer.

---

TY that explains it real well and glad I made my bracket so I can move it to any downward angle I want. May even move it down more as I really don't care about the top two feet and when the crappies and deeper the top 5 feet doesn't matter. Don

Quote:

---

Originally Posted by azbohunter

If I am following you correctly and I believe I am...how much angle would you have to have in perspective view to see bottom 15' in front of boat in 15 feet of water? I use my livescope "always" for chasing shad and I love it. Saves me so much time and throwing blindly!

---

If you want to see what is 15' in front of you in 15' of water, then your bracket must be bent downward at a 35 (125 degree total) degree angle from horizontal. The closest bottom that you would be able to see would be 15' in front of the boat.

This is where the perspective view has its limitations with deeper water. When you turn the bracket downward to see closer to the boat, you lose range. In the above situation, you would be able to see the bottom from 15' to 32' in front of the boat. You would see nothing that is more than 32' in front of the boat in a direct line from the transducer to the bottom. In other words, take a string from the transducer to the bottom 32' in front of you and you would see nothing that is above that string. The 20 degree transducer is great for pinpointing fish location, but it limits the effectiveness in deeper water.

Let's say that you are looking for shad that are 5' off of the bottom and you have the bracket at 125 degrees, like we are talking about. You wouldn't see them until they were less than 21 feet from the boat.

Bent bracket down and tried again today. No joy. Maybe useful in 5' or less.

Still shows suspended fish well in <15' but very little bottom detail if any and didn't see a fish on bottom all day.

wow your boat hold still like rock!