Most fishing maps and charts that show depth contour lines interpolate those lines from historical sounding data. In other words, the contours are drawn by looking at the measured depth at a number of points and then making educated guesses about what the bottom looks like between those points. In many cases, the results are fairly accurate. But isolated features — a 5-foot ledge between two soundings a quarter mile apart, for example — are easily missed.

In contrast, CMOR Mapping data is the result of methodical surveys with high-resolution echosounders. There is no interpolation, no guesswork, and no unverified “hotspots” reported by local captains. All you see is a complete, accurate, and highly detailed representation of the bottom, including many features that are not shown on any other chart or fishing map.