I just wanted to let everyone know not to make the same mistake I did. Unless you fish KY lake or Barkley DO NOT fall for hummingbird's "lake list" that shows a laundry list of lakes but provides ZERO useful info. I just bought a Lakemaster southeast ver.4 chip for my hummingbird and was astonished that Green River Lake, Cumberland and Dale hollow have ZERO usable info. It has the same useless 40' contour spacing like you get with the standard chart. I even contacted HB prior to purchasing and asked them and they confirmed that southeast ver.4 was what I needed for those 3 lakes.

SO unless you fish a lake listed as HD.. DO NOT waste your money like I did. They list a bunch of lakes but unless it says HD the chip provides ZERO benefit over the useless stock mapping that comes with it. I have a HB 700 series with built in navionics and even that basic mapping provides great detail anywhere in the US. Every other brand of graphs provide basic contour lines & info except for HB. I have owned 5 HB units and never had a different brand but I am seriously looking at Garmin now.

Just a heads up so no one else makes this mistake.