I've go tone of those little 10-ft Bass Raider pontoon boats that I use in the pond I live on. I'd like a depth finder/fish finder that is best for ponds. I have no clue how deep the pond is at certain areas. I'd like to figure out the fish and locations in this and the other ponds in my neighborhood. Any suggestions?

I use this for my kayak and it works great. You might not need the GPS so you could save money and or get more res. or a color screen. Also the battery last for ever.

http://www.cabelas.com/product/Boating/Boating-Electronics/Portable-Sonars-Flashers%7C/pc/104794380/c/104707080/sc/104510880/Eagle174-Cuda-350-SMap-SonarGPS-Portable-Sonar-Unit-Soft-Pack/701279.uts?destination=%2Fcatalog%2Fbrowse%2Fboating-boating-electronics-portable-sonars-flashers%2F_%2FN-1100522%2FNs-CATEGORY_SEQ_104510880%3FWTz_l%3DSBC%253BMMcat104794380%253Bcat104707080

I have an Eagle Cuda portable sounder, powered by 8 AA batteries which last for hours and hours. It was less than a hundred bucks. It does fine in a small pond, but had the one posted by BassininVT been available, I would have opted for that. My favorite pond which I fish in my canoe has several brush piles, mostly sunken Christmas trees.

I have stumbled across several of them, and the GPS would be invaluable to record them for future reference rather than relying on ranges from landmarks.