Thread: Sonar Quiz #25

Originally Posted by cache22

I am just hard to convince, but I still think it is outside the 2d cone.

This is why I believe SI is king.......With SI, you know where the fish or other structure actually is........ You may miss it on 2D......With DI, you see it, but the range side to side is pretty large and you don't know where it's at ..... With SI, you can narrow the range to get a good look and know exactly where it is.
I haven't used 360....but with it you have even more location information.......You could see the fish and go back and locate it with 360.

Originally Posted by rnvinc

Here is more info for discussion of "target masking" from HB's Mark Gibson ...

403 Forbidden

Rickie

This article must have been before HB announced the 360, since there was only mention of the Furino Omni?

Which would be more accurate about the dead zone?
(1) the transducer cannot ping off of objects that are close to a sharp drop.
(2) the transducer does ping objects close to a sharp drop, but the control head ,that the transducer is connected to, simply ignores the pings received from the transducer, that are deeper in the water than the control head deems to be deeper than the bottom.

I just read what I just posted and I'm not your if I understand it

Originally Posted by kosmo

I just read what I just posted and I'm not your if I understand it

Happens to me all the time....

Originally Posted by kosmo

Which would be more accurate about the dead zone?
(1) the transducer cannot ping off of objects that are close to a sharp drop.
(2) the transducer does ping objects close to a sharp drop, but the control head ,that the transducer is connected to, simply ignores the pings received from the transducer, that are deeper in the water than the control head deems to be deeper than the bottom.

Kos ... I understand perfectly what you're trying to convey in your choices.
#1 is saying it's the tdx's fault & #2 is saying it's the control board/program's fault ... but, in the case of choice #1, the tdx is simply a sending/receiving module, so it has little to factor in on the "reading" of the information being transmitted through it, since that's the job of the program. That would preclude choice #1 ... so #2 wins by default.

... cp

How about an answer #3 than?
(3) the sonar signal from the transducer does reflect off of objects close to a sharp drop, but the control head that the transducer is connected to, does not display them due to user controlled settings (such as Bottom Black in the Matrix 67 unit) or because the stronger signal strength of the sloped bottom is overpowering them.

By “overpowering” I am meaning that the unit can only display one color for each pixel in the display and it is programmed to display the strongest sonar signal returned to it. So the weaker returned signal from the object does not get displayed.
- Having said that; if the sloped bottom were very soft and did not reflect a lot of sonar while the object was very hard and reflected a lot of sonar: you would see a stronger signal within the sloped bottom. But most would just assume that this was a part of the drop.