<html><head></head><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1558187544214_14511"><br></div><div id="yui_3_16_0_ym19_1_1558187544214_14511" dir="ltr">Interesting idea Brian. I guess the effectiveness would depend upon the beam width of the depth sounder but the deeper you were the wider that beam would be as well. It looks like lower frequency transducers have wider beams. I wonder if there's a way to calculate beam width at various depths.</div></div></body></html>