I've finally gotten around to creating depth contour maps using Reefmaster. I've loaded my sonar logs onto Reefmaster, but I only get my tracks/trails to show up on Reefmaster. Now looking back, I see I needed to "convert" and save the sonar logs on my unit to a depth/sonar log after collecting the data? I know I didn't take this step, but imagine I could put the files back on a card, put the card in the unit, and convert the files??? The sonar files are .SL3.