mine has internal also but they only update 1 time per second i was looking to update 5x per second


thanks that's just what i needed to know

Not sure if this is a Lowrance or Navionics question. I have an HDS7 on the GPS screen in certain spots on the lake it shows a circle of dots. I have know idea what this is. Anyone have any ideas? Thanks

Cajunslo

As you might suspect, I know exactly where that bridge is located.

The bridge is definitely flat and not curved as your pictures show: have you ever wondered why it shows curved?

In a few days (on this thread), I will try to explain why with some 'technical' stuff. My intention is to help anyone that is new to this side scan technology.

I was going along the other day past some large floating docks, and started seeing some thin, oblong lines on Downscan, extending up from the bottom and back down. Took me a while to figure out these pretty well had to be cables running from the docks to the bed of the lake.

No, I did not think it was flat, I sure can use all the help you have to offer. And yes I figured you knew where this particular bridge was located, its pretty well known. I will be headed up to TB tomorrow on the south end to try and locate bridges, etc. I enjoy taking sonar logs and reviewing later as much as I do fishing. I just updated my Navionics Platium card and there or alot more bridges showing now, or I just never paid that much attention. I am sure alot of them or gone, but its still fun to look for them. Again i appreciated any help or advice on scanning and logging, etc.

Bobby, why doesn't pvc show up with si/di? Or does anybody else know the answer? I made the most beautiful fish houses and dagnabit they don't show up .

They will show up if you are tuned in correctly.

Possible solutions: Decrease your scan distance to about 40' and make sure you are passing close to your waypoint. The broader your scan distance, the smaller objects appear.

One of the biggest issues I see with a lack of clariety is the fact that the LSS transducer is not exactly parallel with the water surface while scanning (4-6 MPH).

See my post in the early part of this thread for an explaniation.

grout I read where Doc Samson suggested switching SI frequencies when is shallow water. If your hotels are shallow you might give it a try.

Yesterday I was looking for some wood pallets that a guy tied together along the bank when Pomme de Terre was 5' low. I couldn't see them until I switched frequencies then I was able to pick out their shadows as I passed them.

They are in 27 ft of water and I'll try it guys but I'm not sure it'll work, I was running 800mhz. I can get them on 2d but they didn't show up on si or di . It seems like I heard someone else say something about the density being not thick enough or something to that extent. I guess in reality it's better if they don't show up for everybody else. I need to check out this Doc Samson, seems I hear his name quite a bit.

Not trying to play expert here, just wanted to pass along information that may help other TFF's.







Hope it helped.
Bobby

Thanks Bobby, that is good info to know for future reference. I never would have thought that bridge was flat and it makes sense after you explained it . Hey Bobby are the lake maps your have linked to the same ones Bass Pro is selling (san antonio, anyways)? They are about the same price and the fella at the register couldn't tell me much about them.

Keep up the good work fellas!

Bobby,

I just want to make sure I understand this so I catch it when I do it out on the water. This may seem a little elementary for some, if so I apologize.

Lets say I record a pass by a bridge and when I get home I want to review it. I can turn on the range lines and use those to show how you were close to the object and then drifted farther away or closer to it causing the curved look. And if you see that you stayed the same distance away from the object the whole time but the object still looks curved then odds are it is curved.

Does this sound right?

I have one other question.

If I run my cursor over the bridge (where the red dots are) and set way points, will they appear in a straight line (sense the bridge is straight) on my chart?

Yes, with very limited selection.