So I have been doing some more research on depth finders.  I am leaning towards the 9 SI GPS.  I have not even considered the Lowrance units yet.  My head was spinning just considering the humminbird lines lol.  Right now it looks like I want a unit with DI SI and GPS compatible with Navionics.  (to be honest I do not really know what Navionics is but if it is what I think it is... I want it)  I also like the fact that I can add the 360 scan in the future if I see fit.    

 

I have a queston though.  What happens if I am trying to look at structure under a weed bed.  Will it show me the structure in there or will it be blocked by the weeds?  If so is there a specific technology for looking through the weeds?  

 

Man the choices are just astronomical considering depth finders.  There are so many models and each model has several variations... It was easier choosing a wife than a depth finder lol.   

Sonar is somewhat like light, it cannot see through or around solid objects.

It measures distance.

That is what I thought.  Thank you.

This is a submerged weed bed somewhat like hydrilla with Side Imaging:

 

 

This is what the weed point looked like with Down Imaging:

 

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This is how regular 2D sonar and Down Imaging displays it:

 

That is very helpful! Thank you Wayne.

Sonar is somewhat like light, it cannot see through or around solid objects.

It measures distance.

 

 

Not until StructureScan 3D is release later this month or early January.

Not until StructureScan 3D is release later this month or early January.

Sonar is still SOUND NAVIGATION AND RANGING regardless of how the sound pulses are processed.