The technology is available, and well, you might already have everything you need to do it. Today, Raymarine, Simrad, Garmin, Navionics and C-Map offer the power to record your own soundings and convert them into a highly detailed bottom chart with contours down to 1-foot increments.
This ability is most valuable when getting to 1,000 feet requires passing through sometimes shallow Intracoastal Waterway areas or moving past poorly sounded reefs or shifting bars. But are 1-foot contours in 1,000 feet of water of dubious value?
Say you’re trolling a plain that ranges from 1,000 feet to 1,020 feet over a distance of several hundred yards. On a standard chart, that incline might look gradual, but as you pass over it with your sonar locked on the bottom, it records every…