Doctor Sonar Chips

[CatDaddy]

Anyone ever use these? Sounds like Perch Patrol guys use them on Devil's Lake along with some tournament fishermen. Neat concept.

Overlays aerial photos of the lake from 1949, 1980, or 1990 with contours of lake elevation to get you started finding the "spot on the spot". You can see all the old roads, farmsteads, trees, etc. that are now underwater. Seems like you can then turn on your contours on your head unit and see lake depth overlaid.

https://doctorsonar.myshopify.com/c...of-devils-lake-3-sd-card-set-1990-1980ir-1949

 

[svnmag]

I like to to get those Frito's Scoops, fill them with peanut butter then drizzle honey on the whole deal: It's good.

 

[Vollmer]

They are impressive chips.

 

[CatDaddy]

They are impressive chips.

There are some different options....side imaging, different years of overlay. Any insight into what a guy should start with or what the differences/benefits to variations are?