You fish them more often than I do, but I have never noticed lakemaster being off by that much. If I am sitting on a ledge, maybe that will happen sometimes because of poor GPS signal at the time. But their charts are excellent, within 1-2 ft that I've noticed on Bluegrass and Loon. The difference would more than likely be a combination of bad GPS signal at the time that exceeds the 3 meter accuracy, water level offset not configured correctly for current water levels, depth offset not set right, etc. If you don't mind, next time you are out snap a screenshot of the area in question with GPS coordinates on screen and I will run the AC Live on it next time I'm there and take a screenshot of the difference.


Quote Originally Posted by Moveon View Post
Any lake that Lake master surveyed is marked as such. I think they list the name of those lakes in a different color or something.

I have the Lakemaster map for Bluegrass and have found that in some areas of Bluegrass the map says my boat is over 20 ft of water and I'm actually in 7 ft of water. I have to move about 30 ft to get over the 20 ft deep water. This is caused by the survey not sampling enough data points and the GPS locations not being exactly on the spot. Remember that all the GPS data is accurate to plus or minus 3 meters at best and this can vary and be off even more.

I was trolling crank baits along the South East Side of the lake where the depths vary a lot depending on how far out from the shoreline you get. This area the flats vary as to how far out into the lake they reach. Some areas reach out into the water farther and have a shallow depth where as just another 50 to 100 ft to the North the shallow water does not extend out as far into the lake. I found this out the very first time I went along that Eastern Shoreline after leaving the concrete launch ramp at the South end of the Lake. My depth finder was showing deep water and then shallow water and then deep water and then shallow water again for a few hundred yards going along that Eastern Shoreline. During the summer months you can see the milfoil growing in the shallower sections of this shoreline. It must be due to the way they mined this area.

Remember a few feet deeper water can block out the sunlight from reaching the lake bottom and keep the plants from getting any sunlight down there. Weed can be found in the 1 to 7 ft depths but at the 10 ft depths there may be no weeds growing at that depth. This depends on the turbidity of the water or the water clarity and the amount of sunlight hitting the surface of the water along with the angle of the sunlight and the amount of surface waves. Only part of the sunlight actually enters into the water as the rest is reflected off the surface and back out into space again.