With this function, you can display previously recorded mapping lines. All lines that the boat has already driven with a mapping recording are displayed in grey.

This can be particularly useful when making multiple mapping sessions to scan a lake or a specific area of a lake to create a depth map. The grey lines displayed on the map show all the lines that the boat has already covered during mapping.

This allows you to align the grid of the next mapping run with the previous mapping grid, so that there are no gaps in the mapping, resulting in a perfect, seamless depth map even when multiple mappings are combined to one map.

The closer the driving lines are to each other, the more accurate the depth map will be.