Navionics charting questions - need help with charting?

[wallyandre]

Hi. I messed up some parts of my map (Navionics+ on a Furuno 1971f) with Sonarchart Live because I was going too fast. I found the .lsd files on the Navionics SD card and I would like to remove the ones that are faulty, but I can't read their content which looks like gibberish when I open it with notepad. An example of an .lsd file name is "N4678_E2135.lsd" which kind of resembles coordinates, but then again not really. Does anyone know how to identify and edit those .lsd files?

I don’t think there is any way you can identify the bad ones. Why do you want to erase those?

[nik33134]

I don’t think there is any way you can identify the bad ones. Why do you want to erase those?

I was "recording" at a high speed and the transducer sent a false 1000ft depth when in fact the true depth was 300ft. Sonarchart Live then created a large hole on the map, with a bunch of false contour lines. I have four such areas already on my map. It takes a very long time of boating on top of the faulty area in order to correct it completely, if it ever does at all... If I could somehow locate the coordinates of the fault in the .lsd files then I would delete them or change them manually and the problem would be fixed. Ideally that would be done with a Sonarchart Live editor app, if such an app existed... I am guessing that each .lsd file contains coordinate and depth information for a "block" on the map, but I don't know how to see that information...